./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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 10:59:45,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:59:45,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:59:45,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:59:45,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:59:45,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:59:45,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:59:45,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:59:45,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:59:45,996 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:59:45,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:59:45,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:59:45,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:59:46,000 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:59:46,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:59:46,002 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:59:46,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:59:46,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:59:46,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:59:46,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:59:46,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:59:46,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:59:46,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:59:46,013 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:59:46,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:59:46,017 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:59:46,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:59:46,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:59:46,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:59:46,019 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:59:46,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:59:46,020 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:59:46,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:59:46,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:59:46,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:59:46,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:59:46,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:59:46,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:59:46,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:59:46,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:59:46,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:59:46,026 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 10:59:46,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:59:46,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:59:46,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:59:46,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:59:46,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:59:46,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:59:46,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:59:46,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:59:46,049 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:59:46,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:59:46,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:59:46,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 10:59:46,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:59:46,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:59:46,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 10:59:46,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:59:46,052 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:59:46,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:59:46,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:59:46,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:59:46,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:59:46,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:59:46,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:59:46,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:59:46,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:59:46,054 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:59:46,054 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:59:46,054 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:59:46,054 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:59:46,054 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-12-13 10:59:46,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:59:46,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:59:46,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:59:46,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:59:46,285 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:59:46,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 10:59:48,873 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:59:49,002 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:59:49,002 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 10:59:49,010 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/cddf46e5d/ff4f91102e75488a9bb3536421c9b926/FLAG26186eabd [2022-12-13 10:59:49,023 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/cddf46e5d/ff4f91102e75488a9bb3536421c9b926 [2022-12-13 10:59:49,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:59:49,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:59:49,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:49,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:59:49,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:59:49,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:49" (1/1) ... [2022-12-13 10:59:49,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4570bae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:49, skipping insertion in model container [2022-12-13 10:59:49,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:49" (1/1) ... [2022-12-13 10:59:49,039 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:59:49,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:59:49,202 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,203 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,203 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,205 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,205 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,206 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,206 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,206 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,209 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,210 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,211 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,212 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,213 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,216 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,216 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,217 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:49,218 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:49,225 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 10:59:49,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:49,242 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 10:59:49,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55ab54f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:49, skipping insertion in model container [2022-12-13 10:59:49,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:49,243 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 10:59:49,244 INFO L158 Benchmark]: Toolchain (without parser) took 217.17ms. Allocated memory is still 140.5MB. Free memory was 99.6MB in the beginning and 87.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 10:59:49,245 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 140.5MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 10:59:49,245 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.00ms. Allocated memory is still 140.5MB. Free memory was 99.6MB in the beginning and 87.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-13 10:59:49,246 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 140.5MB. Free memory is still 84.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.00ms. Allocated memory is still 140.5MB. Free memory was 99.6MB in the beginning and 87.4MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 163]: 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 --- 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 10:59:50,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:59:50,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:59:50,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:59:50,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:59:50,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:59:50,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:59:50,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:59:50,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:59:50,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:59:50,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:59:50,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:59:50,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:59:50,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:59:50,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:59:50,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:59:50,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:59:50,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:59:50,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:59:50,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:59:50,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:59:50,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:59:50,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:59:50,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:59:50,790 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:59:50,790 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:59:50,790 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:59:50,791 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:59:50,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:59:50,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:59:50,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:59:50,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:59:50,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:59:50,795 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:59:50,796 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:59:50,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:59:50,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:59:50,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:59:50,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:59:50,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:59:50,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:59:50,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 10:59:50,825 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:59:50,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:59:50,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:59:50,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:59:50,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:59:50,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:59:50,827 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:59:50,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:59:50,827 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:59:50,827 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:59:50,827 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:59:50,827 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 10:59:50,828 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:59:50,829 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:59:50,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:59:50,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:59:50,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:59:50,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:59:50,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:59:50,831 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 10:59:50,832 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:59:50,832 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ceec73f9e554c485344f34d2b1865bfa0707ac614302bf3f054f6fb35398f61 [2022-12-13 10:59:51,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:59:51,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:59:51,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:59:51,083 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:59:51,083 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:59:51,084 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 10:59:53,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:59:53,831 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:59:53,832 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 10:59:53,837 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/f00aa0bb1/db6df2ef57b0483b9a4b9ff5caf836a2/FLAGda16a3f2b [2022-12-13 10:59:54,216 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/data/f00aa0bb1/db6df2ef57b0483b9a4b9ff5caf836a2 [2022-12-13 10:59:54,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:59:54,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:59:54,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:54,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:59:54,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:59:54,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379c68fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54, skipping insertion in model container [2022-12-13 10:59:54,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:59:54,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:59:54,373 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,375 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,383 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,383 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,384 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,384 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,385 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,385 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,387 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,395 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,407 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 10:59:54,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:54,429 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 10:59:54,433 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:59:54,443 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,444 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,444 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,446 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,447 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,448 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,449 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,450 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,451 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,451 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,452 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,452 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,453 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,454 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,455 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,456 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,457 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,457 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,458 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,459 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,459 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,466 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,467 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,467 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,473 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 10:59:54,478 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:54,482 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:59:54,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,493 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,494 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,495 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,496 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,497 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,498 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,499 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,500 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,501 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,502 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,503 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,504 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-13 10:59:54,506 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-13 10:59:54,511 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_ec9d6a8b-c9d4-4fb7-8754-b73421431319/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c[4293,4306] [2022-12-13 10:59:54,513 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:54,525 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:59:54,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54 WrapperNode [2022-12-13 10:59:54,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:54,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:59:54,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:59:54,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:59:54,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,561 INFO L138 Inliner]: procedures = 28, calls = 79, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 306 [2022-12-13 10:59:54,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:59:54,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:59:54,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:59:54,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:59:54,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,585 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:59:54,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:59:54,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:59:54,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:59:54,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (1/1) ... [2022-12-13 10:59:54,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:59:54,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:59:54,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:59:54,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:59:54,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 10:59:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 10:59:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 10:59:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 10:59:54,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-13 10:59:54,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:59:54,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:59:54,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 10:59:54,654 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 10:59:54,759 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:59:54,760 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:59:55,348 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:59:55,472 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:59:55,472 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 10:59:55,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:59:55 BoogieIcfgContainer [2022-12-13 10:59:55,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:59:55,476 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:59:55,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:59:55,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:59:55,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:59:54" (1/3) ... [2022-12-13 10:59:55,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cca9339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:59:55, skipping insertion in model container [2022-12-13 10:59:55,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:54" (2/3) ... [2022-12-13 10:59:55,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cca9339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:59:55, skipping insertion in model container [2022-12-13 10:59:55,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:59:55" (3/3) ... [2022-12-13 10:59:55,480 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2022-12-13 10:59:55,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:59:55,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-12-13 10:59:55,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 10:59:55,566 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 10:59:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 262 places, 268 transitions, 568 flow [2022-12-13 10:59:55,674 INFO L130 PetriNetUnfolder]: 19/264 cut-off events. [2022-12-13 10:59:55,674 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 10:59:55,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 264 events. 19/264 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 229 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 212. Up to 2 conditions per place. [2022-12-13 10:59:55,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 262 places, 268 transitions, 568 flow [2022-12-13 10:59:55,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 253 places, 259 transitions, 542 flow [2022-12-13 10:59:55,691 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:59:55,702 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 259 transitions, 542 flow [2022-12-13 10:59:55,705 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 259 transitions, 542 flow [2022-12-13 10:59:55,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 259 transitions, 542 flow [2022-12-13 10:59:55,757 INFO L130 PetriNetUnfolder]: 19/259 cut-off events. [2022-12-13 10:59:55,757 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-13 10:59:55,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 259 events. 19/259 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 227 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 212. Up to 2 conditions per place. [2022-12-13 10:59:55,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 3392 [2022-12-13 11:00:23,334 WARN L233 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 158 DAG size of output: 157 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 11:00:30,952 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 167 DAG size of output: 164 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-13 11:00:33,009 INFO L134 LiptonReduction]: Checked pairs total: 6857 [2022-12-13 11:00:33,009 INFO L136 LiptonReduction]: Total number of compositions: 265 [2022-12-13 11:00:33,021 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:00:33,026 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;@636426a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:00:33,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-12-13 11:00:33,028 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 11:00:33,028 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:00:33,028 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:33,028 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:00:33,029 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:00:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash 39779, now seen corresponding path program 1 times [2022-12-13 11:00:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:00:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113077585] [2022-12-13 11:00:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:33,041 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 11:00:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:00:33,042 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:33,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:33,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:00:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:33,304 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:00:33,305 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 11:00:33,337 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 11:00:33,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:33,338 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:00:33,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113077585] [2022-12-13 11:00:33,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113077585] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:33,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:33,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:00:33,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391059676] [2022-12-13 11:00:33,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:33,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:00:33,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:00:33,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:00:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:00:33,494 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 533 [2022-12-13 11:00:33,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 156 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 11:00:33,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:33,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 533 [2022-12-13 11:00:33,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:36,356 INFO L130 PetriNetUnfolder]: 21072/26499 cut-off events. [2022-12-13 11:00:36,356 INFO L131 PetriNetUnfolder]: For 223/223 co-relation queries the response was YES. [2022-12-13 11:00:36,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53205 conditions, 26499 events. 21072/26499 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 1944. Compared 137260 event pairs, 14510 based on Foata normal form. 0/8208 useless extension candidates. Maximal degree in co-relation 47480. Up to 26073 conditions per place. [2022-12-13 11:00:36,501 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 56 selfloop transitions, 1 changer transitions 0/63 dead transitions. [2022-12-13 11:00:36,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 63 transitions, 264 flow [2022-12-13 11:00:36,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:00:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:00:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-12-13 11:00:36,516 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450281425891182 [2022-12-13 11:00:36,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-12-13 11:00:36,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-12-13 11:00:36,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:36,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-12-13 11:00:36,526 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 11:00:36,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:36,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:36,535 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 156 flow. Second operand 3 states and 720 transitions. [2022-12-13 11:00:36,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 63 transitions, 264 flow [2022-12-13 11:00:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 8 redundant places. [2022-12-13 11:00:36,609 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 136 flow [2022-12-13 11:00:36,610 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, 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=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2022-12-13 11:00:36,614 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2022-12-13 11:00:36,614 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 136 flow [2022-12-13 11:00:36,614 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 11:00:36,615 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:36,615 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:00:36,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:36,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:36,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:00:36,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:36,818 INFO L85 PathProgramCache]: Analyzing trace with hash 39780, now seen corresponding path program 1 times [2022-12-13 11:00:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:00:36,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2018193369] [2022-12-13 11:00:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:36,820 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 11:00:36,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:00:36,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:36,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:00:37,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:37,195 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:00:37,195 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 11:00:37,219 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 11:00:37,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:37,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:00:37,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2018193369] [2022-12-13 11:00:37,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2018193369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:37,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:37,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:00:37,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234730799] [2022-12-13 11:00:37,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:00:37,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:00:37,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:00:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:00:37,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 533 [2022-12-13 11:00:37,418 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 136 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 11:00:37,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:37,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 533 [2022-12-13 11:00:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:41,877 INFO L130 PetriNetUnfolder]: 42143/52995 cut-off events. [2022-12-13 11:00:41,877 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:00:41,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105588 conditions, 52995 events. 42143/52995 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3684. Compared 296720 event pairs, 29020 based on Foata normal form. 0/16973 useless extension candidates. Maximal degree in co-relation 105582. Up to 26074 conditions per place. [2022-12-13 11:00:42,199 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 107 selfloop transitions, 4 changer transitions 0/117 dead transitions. [2022-12-13 11:00:42,200 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 117 transitions, 474 flow [2022-12-13 11:00:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:00:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:00:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2022-12-13 11:00:42,203 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4834271419637273 [2022-12-13 11:00:42,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2022-12-13 11:00:42,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2022-12-13 11:00:42,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:42,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2022-12-13 11:00:42,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 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 11:00:42,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:42,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:42,209 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 136 flow. Second operand 3 states and 773 transitions. [2022-12-13 11:00:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 117 transitions, 474 flow [2022-12-13 11:00:42,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 117 transitions, 473 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:00:42,211 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 167 flow [2022-12-13 11:00:42,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=167, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2022-12-13 11:00:42,212 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2022-12-13 11:00:42,212 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 167 flow [2022-12-13 11:00:42,213 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 11:00:42,213 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:42,213 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:00:42,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:00:42,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:42,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:00:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1240193, now seen corresponding path program 1 times [2022-12-13 11:00:42,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:00:42,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115006437] [2022-12-13 11:00:42,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:42,422 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 11:00:42,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:00:42,427 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:42,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:00:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:42,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,688 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-13 11:00:42,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-13 11:00:42,734 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-13 11:00:42,735 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 40 treesize of output 34 [2022-12-13 11:00:42,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:42,788 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 11:00:42,818 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 11:00:42,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:42,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:00:42,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115006437] [2022-12-13 11:00:42,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115006437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:42,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:42,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:00:42,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92490811] [2022-12-13 11:00:42,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:42,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:00:42,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:00:42,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:00:42,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:00:43,138 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 533 [2022-12-13 11:00:43,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 167 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 11:00:43,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:43,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 533 [2022-12-13 11:00:43,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:46,299 INFO L130 PetriNetUnfolder]: 33863/42913 cut-off events. [2022-12-13 11:00:46,299 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:00:46,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85438 conditions, 42913 events. 33863/42913 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2880. Compared 239329 event pairs, 23140 based on Foata normal form. 0/14259 useless extension candidates. Maximal degree in co-relation 85429. Up to 42061 conditions per place. [2022-12-13 11:00:46,506 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 57 selfloop transitions, 1 changer transitions 0/64 dead transitions. [2022-12-13 11:00:46,506 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 64 transitions, 279 flow [2022-12-13 11:00:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:00:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:00:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 732 transitions. [2022-12-13 11:00:46,509 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45778611632270166 [2022-12-13 11:00:46,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 732 transitions. [2022-12-13 11:00:46,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 732 transitions. [2022-12-13 11:00:46,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:46,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 732 transitions. [2022-12-13 11:00:46,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.0) internal successors, (732), 3 states have internal predecessors, (732), 0 states have call successors, (0), 0 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 11:00:46,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:46,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:00:46,513 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 167 flow. Second operand 3 states and 732 transitions. [2022-12-13 11:00:46,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 64 transitions, 279 flow [2022-12-13 11:00:46,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:00:46,515 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 157 flow [2022-12-13 11:00:46,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, 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=157, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2022-12-13 11:00:46,516 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2022-12-13 11:00:46,516 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 157 flow [2022-12-13 11:00:46,516 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 11:00:46,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:46,517 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:00:46,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:00:46,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:46,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:00:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1237837, now seen corresponding path program 1 times [2022-12-13 11:00:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:00:46,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177497646] [2022-12-13 11:00:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:46,719 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 11:00:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:00:46,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:46,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:46,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 11:00:46,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:46,938 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:00:46,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-13 11:00:47,001 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 11:00:47,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:47,201 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 11:00:47,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:00:47,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177497646] [2022-12-13 11:00:47,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177497646] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:00:47,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:00:47,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 11:00:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598632967] [2022-12-13 11:00:47,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 11:00:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:00:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 11:00:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 11:00:48,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 533 [2022-12-13 11:00:48,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 157 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 11:00:48,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:48,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 533 [2022-12-13 11:00:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:54,206 INFO L130 PetriNetUnfolder]: 50800/64378 cut-off events. [2022-12-13 11:00:54,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:00:54,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128171 conditions, 64378 events. 50800/64378 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3904. Compared 371839 event pairs, 34710 based on Foata normal form. 0/22147 useless extension candidates. Maximal degree in co-relation 128162. Up to 21032 conditions per place. [2022-12-13 11:00:54,569 INFO L137 encePairwiseOnDemand]: 525/533 looper letters, 152 selfloop transitions, 17 changer transitions 0/175 dead transitions. [2022-12-13 11:00:54,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 175 transitions, 751 flow [2022-12-13 11:00:54,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:00:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:00:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1435 transitions. [2022-12-13 11:00:54,574 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2022-12-13 11:00:54,574 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1435 transitions. [2022-12-13 11:00:54,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1435 transitions. [2022-12-13 11:00:54,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:54,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1435 transitions. [2022-12-13 11:00:54,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 239.16666666666666) internal successors, (1435), 6 states have internal predecessors, (1435), 0 states have call successors, (0), 0 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 11:00:54,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 533.0) internal successors, (3731), 7 states have internal predecessors, (3731), 0 states have call successors, (0), 0 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 11:00:54,582 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 533.0) internal successors, (3731), 7 states have internal predecessors, (3731), 0 states have call successors, (0), 0 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 11:00:54,583 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 157 flow. Second operand 6 states and 1435 transitions. [2022-12-13 11:00:54,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 175 transitions, 751 flow [2022-12-13 11:00:54,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 175 transitions, 750 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:00:54,586 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 285 flow [2022-12-13 11:00:54,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2022-12-13 11:00:54,586 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2022-12-13 11:00:54,586 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 285 flow [2022-12-13 11:00:54,587 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 11:00:54,587 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:54,587 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 11:00:54,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:54,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:54,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:00:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:54,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1240192, now seen corresponding path program 1 times [2022-12-13 11:00:54,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:00:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975656286] [2022-12-13 11:00:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:54,794 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 11:00:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:00:54,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:54,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:00:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 11:00:54,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:00:55,059 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-13 11:00:55,059 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 11:00:55,989 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-12-13 11:00:55,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 11:00:56,236 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 11:00:56,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:00:56,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:00:56,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975656286] [2022-12-13 11:00:56,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975656286] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:56,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:56,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:00:56,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653399601] [2022-12-13 11:00:56,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:56,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:00:56,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:00:56,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:00:56,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:00:56,713 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 533 [2022-12-13 11:00:56,714 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 285 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 11:00:56,714 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:56,714 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 533 [2022-12-13 11:00:56,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:01,149 INFO L130 PetriNetUnfolder]: 38378/49253 cut-off events. [2022-12-13 11:01:01,149 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:01:01,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97966 conditions, 49253 events. 38378/49253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 2939. Compared 287331 event pairs, 25890 based on Foata normal form. 0/18157 useless extension candidates. Maximal degree in co-relation 97952. Up to 47975 conditions per place. [2022-12-13 11:01:01,388 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 66 selfloop transitions, 1 changer transitions 0/73 dead transitions. [2022-12-13 11:01:01,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 399 flow [2022-12-13 11:01:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:01:01,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:01:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2022-12-13 11:01:01,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4527829893683552 [2022-12-13 11:01:01,391 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2022-12-13 11:01:01,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2022-12-13 11:01:01,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:01,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2022-12-13 11:01:01,393 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 11:01:01,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:01,395 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:01,395 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 285 flow. Second operand 3 states and 724 transitions. [2022-12-13 11:01:01,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 399 flow [2022-12-13 11:01:01,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 73 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:01:01,398 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 248 flow [2022-12-13 11:01:01,398 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2022-12-13 11:01:01,399 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2022-12-13 11:01:01,399 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 248 flow [2022-12-13 11:01:01,400 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 11:01:01,400 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:01,400 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:01:01,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:01:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:01,602 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 11:01:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:01,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1191854096, now seen corresponding path program 1 times [2022-12-13 11:01:01,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:01:01,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750374031] [2022-12-13 11:01:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:01,605 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 11:01:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:01:01,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:01,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:01:01,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:01,832 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-12-13 11:01:01,832 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 11:01:02,475 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-12-13 11:01:02,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 11:01:02,706 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 11:01:02,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:01:02,706 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:01:02,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750374031] [2022-12-13 11:01:02,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750374031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:02,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:02,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:01:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842207312] [2022-12-13 11:01:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:02,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:01:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:01:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:01:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:01:03,106 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 533 [2022-12-13 11:01:03,107 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 248 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 11:01:03,107 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:03,107 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 533 [2022-12-13 11:01:03,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:07,033 INFO L130 PetriNetUnfolder]: 36959/47366 cut-off events. [2022-12-13 11:01:07,033 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:01:07,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94183 conditions, 47366 events. 36959/47366 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2825. Compared 273860 event pairs, 24783 based on Foata normal form. 0/17746 useless extension candidates. Maximal degree in co-relation 94168. Up to 46088 conditions per place. [2022-12-13 11:01:07,288 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 64 selfloop transitions, 1 changer transitions 0/71 dead transitions. [2022-12-13 11:01:07,288 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 374 flow [2022-12-13 11:01:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:01:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:01:07,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 722 transitions. [2022-12-13 11:01:07,290 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4515322076297686 [2022-12-13 11:01:07,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 722 transitions. [2022-12-13 11:01:07,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 722 transitions. [2022-12-13 11:01:07,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:07,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 722 transitions. [2022-12-13 11:01:07,292 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 11:01:07,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:07,294 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:07,294 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 248 flow. Second operand 3 states and 722 transitions. [2022-12-13 11:01:07,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 374 flow [2022-12-13 11:01:07,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 71 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:01:07,296 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 245 flow [2022-12-13 11:01:07,296 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2022-12-13 11:01:07,296 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2022-12-13 11:01:07,297 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 245 flow [2022-12-13 11:01:07,297 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 11:01:07,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:07,297 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:01:07,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:07,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:07,498 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 11:01:07,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1191854097, now seen corresponding path program 1 times [2022-12-13 11:01:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:01:07,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897072339] [2022-12-13 11:01:07,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:07,501 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 11:01:07,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:01:07,504 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:07,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:07,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:01:07,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,740 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-12-13 11:01:07,740 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 11:01:07,766 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 11:01:07,766 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 11:01:07,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:01:07,827 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 11:01:07,864 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 11:01:07,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:01:07,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:01:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897072339] [2022-12-13 11:01:07,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897072339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:07,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:07,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:01:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406130117] [2022-12-13 11:01:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:01:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:01:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:01:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:01:08,089 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 533 [2022-12-13 11:01:08,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 245 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 11:01:08,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:08,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 533 [2022-12-13 11:01:08,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:11,452 INFO L130 PetriNetUnfolder]: 35540/45479 cut-off events. [2022-12-13 11:01:11,452 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:01:11,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90410 conditions, 45479 events. 35540/45479 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 2715. Compared 260881 event pairs, 23676 based on Foata normal form. 0/17335 useless extension candidates. Maximal degree in co-relation 90394. Up to 44201 conditions per place. [2022-12-13 11:01:11,710 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 62 selfloop transitions, 1 changer transitions 0/69 dead transitions. [2022-12-13 11:01:11,710 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 367 flow [2022-12-13 11:01:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:01:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:01:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-12-13 11:01:11,712 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4540337711069418 [2022-12-13 11:01:11,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-12-13 11:01:11,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-12-13 11:01:11,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:11,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-12-13 11:01:11,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 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 11:01:11,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:11,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:01:11,719 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 245 flow. Second operand 3 states and 726 transitions. [2022-12-13 11:01:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 69 transitions, 367 flow [2022-12-13 11:01:11,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:01:11,722 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 242 flow [2022-12-13 11:01:11,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=68, 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=242, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2022-12-13 11:01:11,722 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, -3 predicate places. [2022-12-13 11:01:11,723 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 242 flow [2022-12-13 11:01:11,723 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 11:01:11,723 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:11,723 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 11:01:11,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:11,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:11,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:01:11,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:11,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1773679196, now seen corresponding path program 2 times [2022-12-13 11:01:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:01:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419570943] [2022-12-13 11:01:11,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:01:11,928 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 11:01:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:01:11,931 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:11,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:12,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:01:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:01:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 11:01:12,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:12,242 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:01:12,242 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 11:01:12,365 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 11:01:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:01:13,004 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 11:01:13,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:01:13,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419570943] [2022-12-13 11:01:13,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419570943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:01:13,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:01:13,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 11:01:13,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598385686] [2022-12-13 11:01:13,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:01:13,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 11:01:13,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:01:13,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 11:01:13,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 11:01:16,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 533 [2022-12-13 11:01:16,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 242 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 11:01:16,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:16,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 533 [2022-12-13 11:01:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:20,445 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 11:01:22,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:01:25,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:01:27,717 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 11:01:39,712 INFO L130 PetriNetUnfolder]: 94764/121257 cut-off events. [2022-12-13 11:01:39,712 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 11:01:40,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240988 conditions, 121257 events. 94764/121257 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 6002. Compared 754895 event pairs, 63136 based on Foata normal form. 9/47583 useless extension candidates. Maximal degree in co-relation 240971. Up to 14739 conditions per place. [2022-12-13 11:01:40,440 INFO L137 encePairwiseOnDemand]: 526/533 looper letters, 348 selfloop transitions, 29 changer transitions 0/383 dead transitions. [2022-12-13 11:01:40,440 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 383 transitions, 1760 flow [2022-12-13 11:01:40,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 11:01:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-13 11:01:40,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3142 transitions. [2022-12-13 11:01:40,449 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4534564872275942 [2022-12-13 11:01:40,449 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3142 transitions. [2022-12-13 11:01:40,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3142 transitions. [2022-12-13 11:01:40,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:40,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3142 transitions. [2022-12-13 11:01:40,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 241.69230769230768) internal successors, (3142), 13 states have internal predecessors, (3142), 0 states have call successors, (0), 0 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 11:01:40,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 533.0) internal successors, (7462), 14 states have internal predecessors, (7462), 0 states have call successors, (0), 0 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 11:01:40,472 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 533.0) internal successors, (7462), 14 states have internal predecessors, (7462), 0 states have call successors, (0), 0 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 11:01:40,472 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 242 flow. Second operand 13 states and 3142 transitions. [2022-12-13 11:01:40,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 383 transitions, 1760 flow [2022-12-13 11:01:40,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 383 transitions, 1759 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:01:40,479 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 449 flow [2022-12-13 11:01:40,479 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=449, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-12-13 11:01:40,479 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2022-12-13 11:01:40,480 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 449 flow [2022-12-13 11:01:40,481 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 11:01:40,481 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:40,481 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:01:40,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:01:40,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:40,682 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:01:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1707235659, now seen corresponding path program 1 times [2022-12-13 11:01:40,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:01:40,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705519998] [2022-12-13 11:01:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:40,683 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 11:01:40,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:01:40,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:40,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:40,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:01:40,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:40,890 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 11:01:40,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:01:40,890 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:01:40,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705519998] [2022-12-13 11:01:40,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705519998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:40,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:40,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:01:40,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954920326] [2022-12-13 11:01:40,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:01:40,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:01:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:01:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:01:40,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 533 [2022-12-13 11:01:40,984 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 449 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 11:01:40,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:40,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 533 [2022-12-13 11:01:40,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:01:53,254 INFO L130 PetriNetUnfolder]: 106172/137522 cut-off events. [2022-12-13 11:01:53,254 INFO L131 PetriNetUnfolder]: For 69/69 co-relation queries the response was YES. [2022-12-13 11:01:53,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273465 conditions, 137522 events. 106172/137522 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 6424. Compared 895363 event pairs, 71712 based on Foata normal form. 0/57009 useless extension candidates. Maximal degree in co-relation 273439. Up to 117848 conditions per place. [2022-12-13 11:01:54,294 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 124 selfloop transitions, 3 changer transitions 0/133 dead transitions. [2022-12-13 11:01:54,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 133 transitions, 898 flow [2022-12-13 11:01:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:01:54,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:01:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 983 transitions. [2022-12-13 11:01:54,297 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46106941838649157 [2022-12-13 11:01:54,297 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 983 transitions. [2022-12-13 11:01:54,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 983 transitions. [2022-12-13 11:01:54,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:01:54,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 983 transitions. [2022-12-13 11:01:54,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 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 11:01:54,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:01:54,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:01:54,301 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 449 flow. Second operand 4 states and 983 transitions. [2022-12-13 11:01:54,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 133 transitions, 898 flow [2022-12-13 11:01:54,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 133 transitions, 815 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-12-13 11:01:54,307 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 403 flow [2022-12-13 11:01:54,308 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=403, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2022-12-13 11:01:54,308 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2022-12-13 11:01:54,309 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 403 flow [2022-12-13 11:01:54,309 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 11:01:54,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:01:54,309 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:01:54,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:54,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:54,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:01:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:01:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash 916967966, now seen corresponding path program 1 times [2022-12-13 11:01:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:01:54,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022023902] [2022-12-13 11:01:54,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:01:54,514 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 11:01:54,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:01:54,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:54,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:01:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:01:54,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 11:01:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:01:54,737 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:01:54,737 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 11:01:54,762 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:01:54,763 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 11:01:54,778 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 11:01:54,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:01:54,778 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:01:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022023902] [2022-12-13 11:01:54,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022023902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:01:54,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:01:54,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:01:54,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944636891] [2022-12-13 11:01:54,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:01:54,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:01:54,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:01:54,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:01:54,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:01:54,984 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 533 [2022-12-13 11:01:54,985 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 403 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 11:01:54,985 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:01:54,985 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 533 [2022-12-13 11:01:54,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:02:04,229 INFO L130 PetriNetUnfolder]: 74108/97330 cut-off events. [2022-12-13 11:02:04,229 INFO L131 PetriNetUnfolder]: For 9463/9463 co-relation queries the response was YES. [2022-12-13 11:02:04,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213179 conditions, 97330 events. 74108/97330 cut-off events. For 9463/9463 co-relation queries the response was YES. Maximal size of possible extension queue 4493. Compared 634886 event pairs, 50688 based on Foata normal form. 0/53018 useless extension candidates. Maximal degree in co-relation 213151. Up to 94549 conditions per place. [2022-12-13 11:02:04,958 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 65 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2022-12-13 11:02:04,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 83 transitions, 549 flow [2022-12-13 11:02:04,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:02:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:02:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 921 transitions. [2022-12-13 11:02:04,961 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43198874296435275 [2022-12-13 11:02:04,961 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 921 transitions. [2022-12-13 11:02:04,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 921 transitions. [2022-12-13 11:02:04,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:02:04,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 921 transitions. [2022-12-13 11:02:04,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 230.25) internal successors, (921), 4 states have internal predecessors, (921), 0 states have call successors, (0), 0 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 11:02:04,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:02:04,965 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:02:04,965 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 403 flow. Second operand 4 states and 921 transitions. [2022-12-13 11:02:04,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 83 transitions, 549 flow [2022-12-13 11:02:04,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 543 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 11:02:04,971 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 413 flow [2022-12-13 11:02:04,972 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=413, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2022-12-13 11:02:04,972 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 16 predicate places. [2022-12-13 11:02:04,972 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 413 flow [2022-12-13 11:02:04,973 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 11:02:04,973 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:02:04,973 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:02:04,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:05,174 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 11:02:05,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:02:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1384452313, now seen corresponding path program 1 times [2022-12-13 11:02:05,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:02:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761049031] [2022-12-13 11:02:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:02:05,177 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 11:02:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:02:05,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:02:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:02:05,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:02:05,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:05,447 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-13 11:02:05,448 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 11:02:05,510 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:02:05,510 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 11:02:05,549 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 11:02:05,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:02:05,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:02:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761049031] [2022-12-13 11:02:05,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761049031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:02:05,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:02:05,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:02:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787474658] [2022-12-13 11:02:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:02:05,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:02:05,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:02:05,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:02:05,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:02:05,723 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 533 [2022-12-13 11:02:05,724 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 413 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 11:02:05,724 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:02:05,724 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 533 [2022-12-13 11:02:05,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:02:14,430 INFO L130 PetriNetUnfolder]: 72916/95562 cut-off events. [2022-12-13 11:02:14,430 INFO L131 PetriNetUnfolder]: For 9385/9385 co-relation queries the response was YES. [2022-12-13 11:02:14,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209380 conditions, 95562 events. 72916/95562 cut-off events. For 9385/9385 co-relation queries the response was YES. Maximal size of possible extension queue 4479. Compared 619098 event pairs, 49864 based on Foata normal form. 0/52442 useless extension candidates. Maximal degree in co-relation 209351. Up to 92794 conditions per place. [2022-12-13 11:02:15,232 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 74 selfloop transitions, 1 changer transitions 0/81 dead transitions. [2022-12-13 11:02:15,232 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 559 flow [2022-12-13 11:02:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:02:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:02:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2022-12-13 11:02:15,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44777986241400874 [2022-12-13 11:02:15,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2022-12-13 11:02:15,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2022-12-13 11:02:15,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:02:15,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2022-12-13 11:02:15,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 11:02:15,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:02:15,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:02:15,237 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 413 flow. Second operand 3 states and 716 transitions. [2022-12-13 11:02:15,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 559 flow [2022-12-13 11:02:15,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 546 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:02:15,246 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 398 flow [2022-12-13 11:02:15,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=85, 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=398, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2022-12-13 11:02:15,246 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2022-12-13 11:02:15,246 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 398 flow [2022-12-13 11:02:15,247 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 11:02:15,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:02:15,247 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:02:15,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Forceful destruction successful, exit code 0 [2022-12-13 11:02:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:15,448 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:02:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:02:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1384452312, now seen corresponding path program 1 times [2022-12-13 11:02:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:02:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1154844741] [2022-12-13 11:02:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:02:15,451 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 11:02:15,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:02:15,454 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:15,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:02:15,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 11:02:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:02:15,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:15,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:15,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:15,764 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-13 11:02:15,764 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 11:02:15,779 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 18 treesize of output 16 [2022-12-13 11:02:15,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:15,830 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 11:02:15,892 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 11:02:15,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:02:15,892 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:02:15,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1154844741] [2022-12-13 11:02:15,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1154844741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:02:15,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:02:15,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:02:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805490336] [2022-12-13 11:02:15,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:02:15,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:02:15,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:02:15,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:02:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:02:16,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 533 [2022-12-13 11:02:16,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 398 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 11:02:16,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:02:16,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 533 [2022-12-13 11:02:16,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:02:24,612 INFO L130 PetriNetUnfolder]: 71724/93794 cut-off events. [2022-12-13 11:02:24,612 INFO L131 PetriNetUnfolder]: For 9273/9273 co-relation queries the response was YES. [2022-12-13 11:02:25,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205572 conditions, 93794 events. 71724/93794 cut-off events. For 9273/9273 co-relation queries the response was YES. Maximal size of possible extension queue 4465. Compared 603419 event pairs, 49040 based on Foata normal form. 0/51866 useless extension candidates. Maximal degree in co-relation 205543. Up to 91026 conditions per place. [2022-12-13 11:02:25,523 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 72 selfloop transitions, 1 changer transitions 0/79 dead transitions. [2022-12-13 11:02:25,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 540 flow [2022-12-13 11:02:25,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:02:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:02:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-12-13 11:02:25,526 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.450281425891182 [2022-12-13 11:02:25,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-12-13 11:02:25,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-12-13 11:02:25,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:02:25,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-12-13 11:02:25,527 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 11:02:25,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:02:25,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:02:25,529 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 398 flow. Second operand 3 states and 720 transitions. [2022-12-13 11:02:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 540 flow [2022-12-13 11:02:25,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 79 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:02:25,534 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 395 flow [2022-12-13 11:02:25,534 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=395, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2022-12-13 11:02:25,535 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 13 predicate places. [2022-12-13 11:02:25,535 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 395 flow [2022-12-13 11:02:25,535 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 11:02:25,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:02:25,535 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:02:25,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:25,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:25,737 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:02:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:02:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 916967964, now seen corresponding path program 1 times [2022-12-13 11:02:25,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:02:25,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651169830] [2022-12-13 11:02:25,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:02:25,740 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 11:02:25,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:02:25,743 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:25,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:02:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:02:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 11:02:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:02:26,007 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:02:26,008 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 11:02:26,162 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:02:26,163 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 11:02:26,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:02:26,269 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 11:02:26,280 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:02:26,281 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 11:02:26,317 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 11:02:26,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:02:31,477 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 11:02:31,477 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:02:31,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651169830] [2022-12-13 11:02:31,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651169830] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:02:31,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:02:31,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-12-13 11:02:31,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779645200] [2022-12-13 11:02:31,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:02:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:02:31,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:02:31,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:02:31,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:02:34,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:02:37,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:02:39,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:02:44,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:02:45,838 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 533 [2022-12-13 11:02:45,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 395 flow. Second operand has 8 states, 8 states have (on average 201.5) internal successors, (1612), 8 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:02:45,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:02:45,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 533 [2022-12-13 11:02:45,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:02:53,809 WARN L233 SmtUtils]: Spent 7.87s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:03:01,696 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:03:03,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 11:03:08,995 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 [1] [2022-12-13 11:03:32,222 INFO L130 PetriNetUnfolder]: 143316/187668 cut-off events. [2022-12-13 11:03:32,222 INFO L131 PetriNetUnfolder]: For 24118/24118 co-relation queries the response was YES. [2022-12-13 11:03:33,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406911 conditions, 187668 events. 143316/187668 cut-off events. For 24118/24118 co-relation queries the response was YES. Maximal size of possible extension queue 8211. Compared 1289614 event pairs, 97584 based on Foata normal form. 0/115774 useless extension candidates. Maximal degree in co-relation 406881. Up to 76128 conditions per place. [2022-12-13 11:03:33,871 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 207 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2022-12-13 11:03:33,871 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 244 transitions, 1415 flow [2022-12-13 11:03:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 11:03:33,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 11:03:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3204 transitions. [2022-12-13 11:03:33,878 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.400750469043152 [2022-12-13 11:03:33,878 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3204 transitions. [2022-12-13 11:03:33,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3204 transitions. [2022-12-13 11:03:33,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:03:33,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3204 transitions. [2022-12-13 11:03:33,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 213.6) internal successors, (3204), 15 states have internal predecessors, (3204), 0 states have call successors, (0), 0 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 11:03:33,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 533.0) internal successors, (8528), 16 states have internal predecessors, (8528), 0 states have call successors, (0), 0 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 11:03:33,889 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 533.0) internal successors, (8528), 16 states have internal predecessors, (8528), 0 states have call successors, (0), 0 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 11:03:33,889 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 395 flow. Second operand 15 states and 3204 transitions. [2022-12-13 11:03:33,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 244 transitions, 1415 flow [2022-12-13 11:03:33,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 244 transitions, 1414 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:03:33,899 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 636 flow [2022-12-13 11:03:33,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=636, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2022-12-13 11:03:33,900 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 32 predicate places. [2022-12-13 11:03:33,900 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 636 flow [2022-12-13 11:03:33,900 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 11:03:33,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:03:33,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:03:33,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:03:34,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:34,101 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:03:34,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:03:34,102 INFO L85 PathProgramCache]: Analyzing trace with hash 31644611, now seen corresponding path program 1 times [2022-12-13 11:03:34,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:03:34,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303477656] [2022-12-13 11:03:34,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:03:34,103 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 11:03:34,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:03:34,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:34,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:03:34,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:03:34,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:03:34,271 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 11:03:34,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:03:34,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:03:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303477656] [2022-12-13 11:03:34,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303477656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:03:34,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:03:34,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:03:34,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576319757] [2022-12-13 11:03:34,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:03:34,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:03:34,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:03:34,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:03:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:03:34,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 533 [2022-12-13 11:03:34,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 636 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 11:03:34,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:03:34,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 533 [2022-12-13 11:03:34,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:03:51,529 INFO L130 PetriNetUnfolder]: 127668/167667 cut-off events. [2022-12-13 11:03:51,530 INFO L131 PetriNetUnfolder]: For 105887/105887 co-relation queries the response was YES. [2022-12-13 11:03:52,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389512 conditions, 167667 events. 127668/167667 cut-off events. For 105887/105887 co-relation queries the response was YES. Maximal size of possible extension queue 7747. Compared 1155039 event pairs, 87203 based on Foata normal form. 0/112799 useless extension candidates. Maximal degree in co-relation 389475. Up to 159083 conditions per place. [2022-12-13 11:03:53,153 INFO L137 encePairwiseOnDemand]: 524/533 looper letters, 104 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2022-12-13 11:03:53,154 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 983 flow [2022-12-13 11:03:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:03:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:03:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 968 transitions. [2022-12-13 11:03:53,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4540337711069418 [2022-12-13 11:03:53,157 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 968 transitions. [2022-12-13 11:03:53,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 968 transitions. [2022-12-13 11:03:53,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:03:53,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 968 transitions. [2022-12-13 11:03:53,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 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 11:03:53,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:03:53,160 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:03:53,160 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 636 flow. Second operand 4 states and 968 transitions. [2022-12-13 11:03:53,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 983 flow [2022-12-13 11:03:53,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 128 transitions, 962 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 11:03:53,321 INFO L231 Difference]: Finished difference. Result has 109 places, 99 transitions, 706 flow [2022-12-13 11:03:53,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=615, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=109, PETRI_TRANSITIONS=99} [2022-12-13 11:03:53,321 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 36 predicate places. [2022-12-13 11:03:53,321 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 99 transitions, 706 flow [2022-12-13 11:03:53,322 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 11:03:53,322 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:03:53,322 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:03:53,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:03:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:53,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:03:53,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:03:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash 981218618, now seen corresponding path program 1 times [2022-12-13 11:03:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:03:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889946011] [2022-12-13 11:03:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:03:53,526 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 11:03:53,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:03:53,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:03:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:03:53,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:03:53,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:03:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:03:54,006 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-12-13 11:03:54,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-12-13 11:03:54,029 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 502 treesize of output 494 [2022-12-13 11:03:54,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:03:54,133 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 11:03:54,271 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 11:03:54,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:03:54,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:03:54,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889946011] [2022-12-13 11:03:54,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889946011] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:03:54,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:03:54,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:03:54,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914897896] [2022-12-13 11:03:54,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:03:54,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:03:54,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:03:54,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:03:54,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:03:54,644 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 533 [2022-12-13 11:03:54,645 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 99 transitions, 706 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 11:03:54,645 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:03:54,645 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 533 [2022-12-13 11:03:54,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:04:11,655 INFO L130 PetriNetUnfolder]: 120388/158127 cut-off events. [2022-12-13 11:04:11,655 INFO L131 PetriNetUnfolder]: For 111668/111668 co-relation queries the response was YES. [2022-12-13 11:04:12,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414849 conditions, 158127 events. 120388/158127 cut-off events. For 111668/111668 co-relation queries the response was YES. Maximal size of possible extension queue 7408. Compared 1084832 event pairs, 82323 based on Foata normal form. 0/119407 useless extension candidates. Maximal degree in co-relation 414810. Up to 152835 conditions per place. [2022-12-13 11:04:13,330 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 90 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2022-12-13 11:04:13,330 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 97 transitions, 884 flow [2022-12-13 11:04:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:04:13,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:04:13,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2022-12-13 11:04:13,333 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452782989368355 [2022-12-13 11:04:13,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2022-12-13 11:04:13,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2022-12-13 11:04:13,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:04:13,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2022-12-13 11:04:13,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 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 11:04:13,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:04:13,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:04:13,336 INFO L175 Difference]: Start difference. First operand has 109 places, 99 transitions, 706 flow. Second operand 3 states and 712 transitions. [2022-12-13 11:04:13,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 97 transitions, 884 flow [2022-12-13 11:04:13,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 97 transitions, 841 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-12-13 11:04:13,468 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 661 flow [2022-12-13 11:04:13,468 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=661, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2022-12-13 11:04:13,469 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 34 predicate places. [2022-12-13 11:04:13,469 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 661 flow [2022-12-13 11:04:13,469 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 11:04:13,469 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:04:13,469 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:04:13,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:04:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:13,671 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:04:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:04:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1889959705, now seen corresponding path program 1 times [2022-12-13 11:04:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:04:13,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478669476] [2022-12-13 11:04:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:04:13,673 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 11:04:13,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:04:13,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:13,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:04:13,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:04:13,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:04:13,798 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 11:04:14,005 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 11:04:14,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:04:14,983 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 11:04:14,984 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:04:14,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478669476] [2022-12-13 11:04:14,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478669476] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:04:14,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:04:14,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-12-13 11:04:14,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939015004] [2022-12-13 11:04:14,984 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:04:14,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:04:14,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:04:14,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:04:14,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:04:19,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 533 [2022-12-13 11:04:19,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 661 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 11:04:19,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:04:19,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 533 [2022-12-13 11:04:19,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:04:39,127 INFO L130 PetriNetUnfolder]: 104116/137436 cut-off events. [2022-12-13 11:04:39,128 INFO L131 PetriNetUnfolder]: For 99414/99414 co-relation queries the response was YES. [2022-12-13 11:04:40,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358181 conditions, 137436 events. 104116/137436 cut-off events. For 99414/99414 co-relation queries the response was YES. Maximal size of possible extension queue 6197. Compared 938844 event pairs, 71298 based on Foata normal form. 0/111084 useless extension candidates. Maximal degree in co-relation 358142. Up to 85620 conditions per place. [2022-12-13 11:04:40,544 INFO L137 encePairwiseOnDemand]: 526/533 looper letters, 141 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2022-12-13 11:04:40,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1332 flow [2022-12-13 11:04:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 11:04:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-13 11:04:40,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2204 transitions. [2022-12-13 11:04:40,550 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4135084427767355 [2022-12-13 11:04:40,550 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2204 transitions. [2022-12-13 11:04:40,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2204 transitions. [2022-12-13 11:04:40,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:04:40,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2204 transitions. [2022-12-13 11:04:40,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 220.4) internal successors, (2204), 10 states have internal predecessors, (2204), 0 states have call successors, (0), 0 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 11:04:40,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 533.0) internal successors, (5863), 11 states have internal predecessors, (5863), 0 states have call successors, (0), 0 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 11:04:40,558 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 533.0) internal successors, (5863), 11 states have internal predecessors, (5863), 0 states have call successors, (0), 0 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 11:04:40,558 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 661 flow. Second operand 10 states and 2204 transitions. [2022-12-13 11:04:40,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1332 flow [2022-12-13 11:04:40,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 190 transitions, 1331 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:04:40,676 INFO L231 Difference]: Finished difference. Result has 117 places, 99 transitions, 785 flow [2022-12-13 11:04:40,677 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=785, PETRI_PLACES=117, PETRI_TRANSITIONS=99} [2022-12-13 11:04:40,677 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 44 predicate places. [2022-12-13 11:04:40,677 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 99 transitions, 785 flow [2022-12-13 11:04:40,677 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 11:04:40,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:04:40,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:04:40,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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)] Ended with exit code 0 [2022-12-13 11:04:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:40,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:04:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:04:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1889959706, now seen corresponding path program 1 times [2022-12-13 11:04:40,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:04:40,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028363056] [2022-12-13 11:04:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:04:40,882 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 11:04:40,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:04:40,884 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:40,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:04:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 11:04:40,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:04:40,984 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 11:04:41,011 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 11:04:41,011 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:04:41,011 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:04:41,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028363056] [2022-12-13 11:04:41,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028363056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:04:41,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:04:41,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:04:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336009817] [2022-12-13 11:04:41,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:04:41,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:04:41,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:04:41,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:04:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:04:41,358 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 533 [2022-12-13 11:04:41,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 99 transitions, 785 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 11:04:41,359 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:04:41,359 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 533 [2022-12-13 11:04:41,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:04:51,535 INFO L130 PetriNetUnfolder]: 68896/92289 cut-off events. [2022-12-13 11:04:51,535 INFO L131 PetriNetUnfolder]: For 110621/110621 co-relation queries the response was YES. [2022-12-13 11:04:52,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251729 conditions, 92289 events. 68896/92289 cut-off events. For 110621/110621 co-relation queries the response was YES. Maximal size of possible extension queue 4220. Compared 626347 event pairs, 47649 based on Foata normal form. 0/86129 useless extension candidates. Maximal degree in co-relation 251688. Up to 88849 conditions per place. [2022-12-13 11:04:52,718 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 70 selfloop transitions, 21 changer transitions 0/97 dead transitions. [2022-12-13 11:04:52,718 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 97 transitions, 959 flow [2022-12-13 11:04:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:04:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:04:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 913 transitions. [2022-12-13 11:04:52,720 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42823639774859285 [2022-12-13 11:04:52,721 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 913 transitions. [2022-12-13 11:04:52,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 913 transitions. [2022-12-13 11:04:52,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:04:52,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 913 transitions. [2022-12-13 11:04:52,722 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 11:04:52,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:04:52,724 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:04:52,724 INFO L175 Difference]: Start difference. First operand has 117 places, 99 transitions, 785 flow. Second operand 4 states and 913 transitions. [2022-12-13 11:04:52,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 97 transitions, 959 flow [2022-12-13 11:04:52,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 97 transitions, 851 flow, removed 20 selfloop flow, removed 5 redundant places. [2022-12-13 11:04:52,883 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 711 flow [2022-12-13 11:04:52,883 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=669, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=711, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2022-12-13 11:04:52,883 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 40 predicate places. [2022-12-13 11:04:52,883 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 711 flow [2022-12-13 11:04:52,884 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 11:04:52,884 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:04:52,884 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:04:52,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:53,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:53,085 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:04:53,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:04:53,087 INFO L85 PathProgramCache]: Analyzing trace with hash 981218620, now seen corresponding path program 1 times [2022-12-13 11:04:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:04:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783138015] [2022-12-13 11:04:53,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:04:53,088 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 11:04:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:04:53,091 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:53,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:04:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:04:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:04:53,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:04:53,349 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-13 11:04:53,350 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 11:04:53,398 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 11:04:53,398 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 11:04:53,427 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 11:04:53,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:04:53,427 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:04:53,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783138015] [2022-12-13 11:04:53,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783138015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:04:53,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:04:53,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:04:53,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447139712] [2022-12-13 11:04:53,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:04:53,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:04:53,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:04:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:04:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:04:53,584 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 533 [2022-12-13 11:04:53,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 711 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 11:04:53,585 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:04:53,585 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 533 [2022-12-13 11:04:53,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:05:02,011 INFO L130 PetriNetUnfolder]: 57131/76512 cut-off events. [2022-12-13 11:05:02,011 INFO L131 PetriNetUnfolder]: For 96082/96082 co-relation queries the response was YES. [2022-12-13 11:05:02,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210927 conditions, 76512 events. 57131/76512 cut-off events. For 96082/96082 co-relation queries the response was YES. Maximal size of possible extension queue 3523. Compared 508623 event pairs, 39537 based on Foata normal form. 0/72508 useless extension candidates. Maximal degree in co-relation 210886. Up to 73520 conditions per place. [2022-12-13 11:05:02,798 INFO L137 encePairwiseOnDemand]: 530/533 looper letters, 88 selfloop transitions, 1 changer transitions 0/95 dead transitions. [2022-12-13 11:05:02,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 95 transitions, 885 flow [2022-12-13 11:05:02,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:05:02,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:05:02,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 702 transitions. [2022-12-13 11:05:02,800 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2022-12-13 11:05:02,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 702 transitions. [2022-12-13 11:05:02,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 702 transitions. [2022-12-13 11:05:02,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:05:02,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 702 transitions. [2022-12-13 11:05:02,801 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 11:05:02,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:05:02,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 533.0) internal successors, (2132), 4 states have internal predecessors, (2132), 0 states have call successors, (0), 0 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 11:05:02,803 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 711 flow. Second operand 3 states and 702 transitions. [2022-12-13 11:05:02,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 95 transitions, 885 flow [2022-12-13 11:05:02,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 95 transitions, 863 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:05:02,932 INFO L231 Difference]: Finished difference. Result has 111 places, 95 transitions, 687 flow [2022-12-13 11:05:02,932 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=109, 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=687, PETRI_PLACES=111, PETRI_TRANSITIONS=95} [2022-12-13 11:05:02,932 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 38 predicate places. [2022-12-13 11:05:02,932 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 95 transitions, 687 flow [2022-12-13 11:05:02,933 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 11:05:02,933 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:05:02,933 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:05:02,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:03,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:03,135 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:05:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:05:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2032253171, now seen corresponding path program 2 times [2022-12-13 11:05:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:05:03,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32166317] [2022-12-13 11:05:03,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:05:03,137 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 11:05:03,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:05:03,140 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:03,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:03,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:05:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:05:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 11:05:03,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:05:03,497 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:05:03,497 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 11:05:03,734 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-13 11:05:03,734 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 11:05:03,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 11:05:03,882 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 11:05:03,902 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 11:05:03,902 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 11:05:03,961 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 11:05:03,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:05:03,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:05:03,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32166317] [2022-12-13 11:05:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [32166317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:05:03,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:05:03,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:05:03,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391694031] [2022-12-13 11:05:03,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:05:03,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:05:03,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:05:03,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:05:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:05:04,504 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 533 [2022-12-13 11:05:04,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 95 transitions, 687 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 11:05:04,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:05:04,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 533 [2022-12-13 11:05:04,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:05:11,691 INFO L130 PetriNetUnfolder]: 47160/63778 cut-off events. [2022-12-13 11:05:11,691 INFO L131 PetriNetUnfolder]: For 80596/80596 co-relation queries the response was YES. [2022-12-13 11:05:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164059 conditions, 63778 events. 47160/63778 cut-off events. For 80596/80596 co-relation queries the response was YES. Maximal size of possible extension queue 2998. Compared 425761 event pairs, 32847 based on Foata normal form. 3152/63574 useless extension candidates. Maximal degree in co-relation 164018. Up to 61196 conditions per place. [2022-12-13 11:05:12,345 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 75 selfloop transitions, 12 changer transitions 0/93 dead transitions. [2022-12-13 11:05:12,345 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 93 transitions, 841 flow [2022-12-13 11:05:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:05:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:05:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 885 transitions. [2022-12-13 11:05:12,348 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4151031894934334 [2022-12-13 11:05:12,348 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 885 transitions. [2022-12-13 11:05:12,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 885 transitions. [2022-12-13 11:05:12,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:05:12,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 885 transitions. [2022-12-13 11:05:12,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 221.25) internal successors, (885), 4 states have internal predecessors, (885), 0 states have call successors, (0), 0 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 11:05:12,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:05:12,352 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:05:12,352 INFO L175 Difference]: Start difference. First operand has 111 places, 95 transitions, 687 flow. Second operand 4 states and 885 transitions. [2022-12-13 11:05:12,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 93 transitions, 841 flow [2022-12-13 11:05:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 93 transitions, 833 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:05:12,419 INFO L231 Difference]: Finished difference. Result has 109 places, 93 transitions, 683 flow [2022-12-13 11:05:12,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=106, 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=683, PETRI_PLACES=109, PETRI_TRANSITIONS=93} [2022-12-13 11:05:12,419 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 36 predicate places. [2022-12-13 11:05:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 93 transitions, 683 flow [2022-12-13 11:05:12,419 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 11:05:12,419 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:05:12,419 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1] [2022-12-13 11:05:12,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:12,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:12,621 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:05:12,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:05:12,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1437461932, now seen corresponding path program 1 times [2022-12-13 11:05:12,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:05:12,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431925444] [2022-12-13 11:05:12,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:05:12,624 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 11:05:12,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:05:12,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:12,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:05:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:05:12,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 11:05:12,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:05:12,749 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 11:05:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:05:13,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:05:15,237 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:05:15,237 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:05:15,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431925444] [2022-12-13 11:05:15,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431925444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:05:15,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:05:15,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-12-13 11:05:15,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441834992] [2022-12-13 11:05:15,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:05:15,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 11:05:15,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:05:15,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 11:05:15,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-12-13 11:05:30,642 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 533 [2022-12-13 11:05:30,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 93 transitions, 683 flow. Second operand has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 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 11:05:30,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:05:30,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 533 [2022-12-13 11:05:30,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:05:35,973 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 11:05:37,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:05:39,979 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:05:41,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:05:43,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:05:45,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:05:47,111 WARN L539 Checker$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 11:06:17,027 INFO L130 PetriNetUnfolder]: 123238/166097 cut-off events. [2022-12-13 11:06:17,027 INFO L131 PetriNetUnfolder]: For 146644/146644 co-relation queries the response was YES. [2022-12-13 11:06:18,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432443 conditions, 166097 events. 123238/166097 cut-off events. For 146644/146644 co-relation queries the response was YES. Maximal size of possible extension queue 5263. Compared 1178094 event pairs, 85095 based on Foata normal form. 36/166035 useless extension candidates. Maximal degree in co-relation 432403. Up to 41230 conditions per place. [2022-12-13 11:06:18,802 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 494 selfloop transitions, 44 changer transitions 0/544 dead transitions. [2022-12-13 11:06:18,802 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 544 transitions, 3427 flow [2022-12-13 11:06:18,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 11:06:18,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-12-13 11:06:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 4321 transitions. [2022-12-13 11:06:18,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45038565770273087 [2022-12-13 11:06:18,811 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 4321 transitions. [2022-12-13 11:06:18,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 4321 transitions. [2022-12-13 11:06:18,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:06:18,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 4321 transitions. [2022-12-13 11:06:18,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 240.05555555555554) internal successors, (4321), 18 states have internal predecessors, (4321), 0 states have call successors, (0), 0 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 11:06:18,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 533.0) internal successors, (10127), 19 states have internal predecessors, (10127), 0 states have call successors, (0), 0 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 11:06:18,823 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 533.0) internal successors, (10127), 19 states have internal predecessors, (10127), 0 states have call successors, (0), 0 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 11:06:18,823 INFO L175 Difference]: Start difference. First operand has 109 places, 93 transitions, 683 flow. Second operand 18 states and 4321 transitions. [2022-12-13 11:06:18,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 544 transitions, 3427 flow [2022-12-13 11:06:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 544 transitions, 3414 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:06:19,377 INFO L231 Difference]: Finished difference. Result has 134 places, 105 transitions, 951 flow [2022-12-13 11:06:19,377 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=951, PETRI_PLACES=134, PETRI_TRANSITIONS=105} [2022-12-13 11:06:19,377 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 61 predicate places. [2022-12-13 11:06:19,378 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 105 transitions, 951 flow [2022-12-13 11:06:19,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 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 11:06:19,378 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:06:19,378 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-12-13 11:06:19,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:06:19,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:06:19,580 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:06:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:06:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -642401020, now seen corresponding path program 3 times [2022-12-13 11:06:19,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:06:19,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176730794] [2022-12-13 11:06:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 11:06:19,583 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 11:06:19,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:06:19,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:06:19,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:06:19,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-13 11:06:19,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:06:19,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 11:06:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:06:20,129 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:06:20,129 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 11:06:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:06:20,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:06:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:06:23,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:06:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176730794] [2022-12-13 11:06:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176730794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:06:23,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:06:23,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-12-13 11:06:23,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115468207] [2022-12-13 11:06:23,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:06:23,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 11:06:23,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:06:23,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 11:06:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-13 11:06:47,053 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 533 [2022-12-13 11:06:47,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 105 transitions, 951 flow. Second operand has 24 states, 24 states have (on average 213.0) internal successors, (5112), 24 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 11:06:47,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:06:47,056 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 533 [2022-12-13 11:06:47,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:06:57,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:06:59,701 WARN L539 Checker$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 11:07:01,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:07:03,707 WARN L539 Checker$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 11:07:05,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:07:07,713 WARN L539 Checker$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 11:07:09,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:07:11,745 WARN L539 Checker$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 11:07:13,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:07:14,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:07:48,400 INFO L130 PetriNetUnfolder]: 123073/165767 cut-off events. [2022-12-13 11:07:48,400 INFO L131 PetriNetUnfolder]: For 146390/146390 co-relation queries the response was YES. [2022-12-13 11:07:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432454 conditions, 165767 events. 123073/165767 cut-off events. For 146390/146390 co-relation queries the response was YES. Maximal size of possible extension queue 5278. Compared 1174878 event pairs, 85095 based on Foata normal form. 12/165669 useless extension candidates. Maximal degree in co-relation 432404. Up to 45173 conditions per place. [2022-12-13 11:07:50,928 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 404 selfloop transitions, 68 changer transitions 0/478 dead transitions. [2022-12-13 11:07:50,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 478 transitions, 3401 flow [2022-12-13 11:07:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 11:07:50,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-13 11:07:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 5530 transitions. [2022-12-13 11:07:50,939 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43230143839899937 [2022-12-13 11:07:50,939 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 5530 transitions. [2022-12-13 11:07:50,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 5530 transitions. [2022-12-13 11:07:50,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:07:50,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 5530 transitions. [2022-12-13 11:07:50,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 230.41666666666666) internal successors, (5530), 24 states have internal predecessors, (5530), 0 states have call successors, (0), 0 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 11:07:50,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 533.0) internal successors, (13325), 25 states have internal predecessors, (13325), 0 states have call successors, (0), 0 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 11:07:50,961 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 533.0) internal successors, (13325), 25 states have internal predecessors, (13325), 0 states have call successors, (0), 0 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 11:07:50,961 INFO L175 Difference]: Start difference. First operand has 134 places, 105 transitions, 951 flow. Second operand 24 states and 5530 transitions. [2022-12-13 11:07:50,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 478 transitions, 3401 flow [2022-12-13 11:07:51,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 478 transitions, 3320 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-12-13 11:07:51,676 INFO L231 Difference]: Finished difference. Result has 163 places, 132 transitions, 1370 flow [2022-12-13 11:07:51,676 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1370, PETRI_PLACES=163, PETRI_TRANSITIONS=132} [2022-12-13 11:07:51,676 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 90 predicate places. [2022-12-13 11:07:51,676 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 132 transitions, 1370 flow [2022-12-13 11:07:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 213.0) internal successors, (5112), 24 states have internal predecessors, (5112), 0 states have call successors, (0), 0 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 11:07:51,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:07:51,677 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:07:51,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:07:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:07:51,879 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:07:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:07:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash -51051325, now seen corresponding path program 2 times [2022-12-13 11:07:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:07:51,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433906278] [2022-12-13 11:07:51,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:07:51,882 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 11:07:51,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:07:51,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:07:51,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:07:52,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 11:07:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:07:52,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:07:52,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:07:52,042 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 11:07:52,206 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 11:07:52,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 11:07:52,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:07:52,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433906278] [2022-12-13 11:07:52,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433906278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:07:52,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:07:52,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 11:07:52,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005692306] [2022-12-13 11:07:52,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:07:52,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 11:07:52,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:07:52,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 11:07:52,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 11:07:52,621 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 533 [2022-12-13 11:07:52,622 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 132 transitions, 1370 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 11:07:52,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:07:52,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 533 [2022-12-13 11:07:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:08:08,391 INFO L130 PetriNetUnfolder]: 81361/111995 cut-off events. [2022-12-13 11:08:08,391 INFO L131 PetriNetUnfolder]: For 118209/118209 co-relation queries the response was YES. [2022-12-13 11:08:09,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258450 conditions, 111995 events. 81361/111995 cut-off events. For 118209/118209 co-relation queries the response was YES. Maximal size of possible extension queue 3519. Compared 800402 event pairs, 56511 based on Foata normal form. 13008/119388 useless extension candidates. Maximal degree in co-relation 258386. Up to 105815 conditions per place. [2022-12-13 11:08:10,106 INFO L137 encePairwiseOnDemand]: 529/533 looper letters, 75 selfloop transitions, 49 changer transitions 0/130 dead transitions. [2022-12-13 11:08:10,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 130 transitions, 1602 flow [2022-12-13 11:08:10,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:08:10,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:08:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2022-12-13 11:08:10,109 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.425422138836773 [2022-12-13 11:08:10,109 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2022-12-13 11:08:10,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2022-12-13 11:08:10,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:08:10,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2022-12-13 11:08:10,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 11:08:10,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:08:10,112 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 533.0) internal successors, (2665), 5 states have internal predecessors, (2665), 0 states have call successors, (0), 0 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 11:08:10,112 INFO L175 Difference]: Start difference. First operand has 163 places, 132 transitions, 1370 flow. Second operand 4 states and 907 transitions. [2022-12-13 11:08:10,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 130 transitions, 1602 flow [2022-12-13 11:08:10,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 130 transitions, 1459 flow, removed 30 selfloop flow, removed 11 redundant places. [2022-12-13 11:08:10,159 INFO L231 Difference]: Finished difference. Result has 153 places, 130 transitions, 1309 flow [2022-12-13 11:08:10,159 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1309, PETRI_PLACES=153, PETRI_TRANSITIONS=130} [2022-12-13 11:08:10,160 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 80 predicate places. [2022-12-13 11:08:10,160 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 130 transitions, 1309 flow [2022-12-13 11:08:10,160 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 11:08:10,160 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:08:10,160 INFO L209 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1] [2022-12-13 11:08:10,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:08:10,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:08:10,362 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 11:08:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:08:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1556166704, now seen corresponding path program 2 times [2022-12-13 11:08:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:08:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585198054] [2022-12-13 11:08:10,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 11:08:10,365 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 11:08:10,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:08:10,367 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:08:10,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:08:10,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 11:08:10,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:08:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 11:08:10,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:08:10,541 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 11:08:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:11,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:08:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:08:17,973 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:08:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585198054] [2022-12-13 11:08:17,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585198054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:08:17,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:08:17,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2022-12-13 11:08:17,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959914261] [2022-12-13 11:08:17,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:08:17,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 11:08:17,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:08:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 11:08:17,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 11:09:16,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 533 [2022-12-13 11:09:16,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 130 transitions, 1309 flow. Second operand has 36 states, 36 states have (on average 213.02777777777777) internal successors, (7669), 36 states have internal predecessors, (7669), 0 states have call successors, (0), 0 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 11:09:16,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:09:16,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 533 [2022-12-13 11:09:16,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:09:35,738 WARN L233 SmtUtils]: Spent 8.32s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:09:38,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:09:40,972 WARN L539 Checker$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 11:09:42,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:09:44,978 WARN L539 Checker$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 11:09:46,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:09:48,984 WARN L539 Checker$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 11:09:50,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:09:53,033 WARN L539 Checker$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 11:09:55,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:09:57,038 WARN L539 Checker$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 11:09:59,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:01,043 WARN L539 Checker$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 11:10:03,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:05,048 WARN L539 Checker$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 11:10:06,777 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 11:10:08,778 WARN L539 Checker$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 11:10:16,638 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 11:11:38,682 INFO L130 PetriNetUnfolder]: 177514/244163 cut-off events. [2022-12-13 11:11:38,682 INFO L131 PetriNetUnfolder]: For 88129/88129 co-relation queries the response was YES. [2022-12-13 11:11:41,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 562677 conditions, 244163 events. 177514/244163 cut-off events. For 88129/88129 co-relation queries the response was YES. Maximal size of possible extension queue 3601. Compared 1782698 event pairs, 122895 based on Foata normal form. 72/244137 useless extension candidates. Maximal degree in co-relation 562615. Up to 41416 conditions per place. [2022-12-13 11:11:42,324 INFO L137 encePairwiseOnDemand]: 527/533 looper letters, 995 selfloop transitions, 83 changer transitions 0/1084 dead transitions. [2022-12-13 11:11:42,324 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 1084 transitions, 7601 flow [2022-12-13 11:11:42,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 11:11:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-12-13 11:11:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 8644 transitions. [2022-12-13 11:11:42,334 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45048988951427976 [2022-12-13 11:11:42,334 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 8644 transitions. [2022-12-13 11:11:42,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 8644 transitions. [2022-12-13 11:11:42,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:11:42,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 8644 transitions. [2022-12-13 11:11:42,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 240.11111111111111) internal successors, (8644), 36 states have internal predecessors, (8644), 0 states have call successors, (0), 0 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 11:11:42,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 533.0) internal successors, (19721), 37 states have internal predecessors, (19721), 0 states have call successors, (0), 0 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 11:11:42,439 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 533.0) internal successors, (19721), 37 states have internal predecessors, (19721), 0 states have call successors, (0), 0 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 11:11:42,439 INFO L175 Difference]: Start difference. First operand has 153 places, 130 transitions, 1309 flow. Second operand 36 states and 8644 transitions. [2022-12-13 11:11:42,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 1084 transitions, 7601 flow [2022-12-13 11:11:42,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 1084 transitions, 7448 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:11:42,533 INFO L231 Difference]: Finished difference. Result has 205 places, 151 transitions, 1788 flow [2022-12-13 11:11:42,533 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=533, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1788, PETRI_PLACES=205, PETRI_TRANSITIONS=151} [2022-12-13 11:11:42,534 INFO L288 CegarLoopForPetriNet]: 73 programPoint places, 132 predicate places. [2022-12-13 11:11:42,534 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 151 transitions, 1788 flow [2022-12-13 11:11:42,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 213.02777777777777) internal successors, (7669), 36 states have internal predecessors, (7669), 0 states have call successors, (0), 0 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 11:11:42,535 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:11:42,535 INFO L209 CegarLoopForPetriNet]: trace histogram [22, 1, 1] [2022-12-13 11:11:42,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:11:42,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:11:42,736 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-12-13 11:11:42,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:11:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 724337604, now seen corresponding path program 4 times [2022-12-13 11:11:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 11:11:42,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999664148] [2022-12-13 11:11:42,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 11:11:42,739 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 11:11:42,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 11:11:42,742 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:11:42,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec9d6a8b-c9d4-4fb7-8754-b73421431319/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 11:11:42,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 11:11:42,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 11:11:42,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 11:11:42,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:11:43,221 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-13 11:11:43,221 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 11:11:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:11:45,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:11:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:11:57,203 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 11:11:57,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999664148] [2022-12-13 11:11:57,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999664148] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:11:57,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 11:11:57,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-12-13 11:11:57,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599638561] [2022-12-13 11:11:57,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 11:11:57,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-13 11:11:57,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 11:11:57,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-13 11:11:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256