./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R --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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:00:05,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:00:05,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:00:05,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:00:05,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:00:05,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:00:05,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:00:05,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:00:05,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:00:05,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:00:05,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:00:05,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:00:05,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:00:05,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:00:05,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:00:05,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:00:05,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:00:05,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:00:05,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:00:05,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:00:05,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:00:05,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:00:05,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:00:05,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:00:05,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:00:05,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:00:05,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:00:05,692 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:00:05,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:00:05,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:00:05,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:00:05,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:00:05,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:00:05,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:00:05,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:00:05,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:00:05,701 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:00:05,702 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:00:05,702 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:00:05,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:00:05,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:00:05,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:00:05,731 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:00:05,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:00:05,732 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:00:05,732 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:00:05,733 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:00:05,733 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:00:05,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:00:05,735 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:00:05,735 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:00:05,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:00:05,736 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:00:05,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:00:05,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:00:05,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:00:05,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:00:05,737 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:00:05,738 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:00:05,738 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:00:05,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:00:05,739 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:00:05,739 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:00:05,739 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:00:05,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:00:05,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:00:05,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:00:05,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:00:05,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:00:05,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:00:05,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:00:05,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:00:05,742 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:00:05,742 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:00:05,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:00:05,743 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_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-11-25 18:00:05,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:00:06,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:00:06,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:00:06,041 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:00:06,042 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:00:06,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-25 18:00:09,433 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:00:09,671 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:00:09,672 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-25 18:00:09,680 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/03d0ddaf6/0548e55226c541e4a2f1c5bb436c96c3/FLAGf8abc8d20 [2022-11-25 18:00:09,696 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/03d0ddaf6/0548e55226c541e4a2f1c5bb436c96c3 [2022-11-25 18:00:09,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:00:09,701 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:00:09,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:09,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:00:09,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:00:09,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:09" (1/1) ... [2022-11-25 18:00:09,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12049559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:09, skipping insertion in model container [2022-11-25 18:00:09,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:09" (1/1) ... [2022-11-25 18:00:09,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:00:09,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:00:09,920 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:09,921 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:09,923 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:09,925 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:09,928 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:09,929 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:09,930 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:09,931 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:09,932 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:09,933 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:09,944 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_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-25 18:00:09,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:09,974 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) [2022-11-25 18:00:09,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a26c94d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:09, skipping insertion in model container [2022-11-25 18:00:09,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:09,975 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 18:00:09,977 INFO L158 Benchmark]: Toolchain (without parser) took 275.80ms. Allocated memory is still 174.1MB. Free memory was 136.1MB in the beginning and 125.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:00:09,978 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:00:09,979 INFO L158 Benchmark]: CACSL2BoogieTranslator took 273.12ms. Allocated memory is still 174.1MB. Free memory was 136.1MB in the beginning and 125.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 18:00:09,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 117.4MB. Free memory is still 67.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 273.12ms. Allocated memory is still 174.1MB. Free memory was 136.1MB in the beginning and 125.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R --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 b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:00:12,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:00:12,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:00:12,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:00:12,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:00:12,603 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:00:12,606 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:00:12,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:00:12,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:00:12,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:00:12,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:00:12,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:00:12,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:00:12,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:00:12,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:00:12,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:00:12,637 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:00:12,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:00:12,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:00:12,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:00:12,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:00:12,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:00:12,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:00:12,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:00:12,666 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:00:12,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:00:12,667 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:00:12,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:00:12,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:00:12,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:00:12,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:00:12,674 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:00:12,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:00:12,677 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:00:12,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:00:12,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:00:12,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:00:12,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:00:12,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:00:12,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:00:12,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:00:12,703 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:00:12,750 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:00:12,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:00:12,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:00:12,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:00:12,754 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:00:12,754 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:00:12,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:00:12,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:00:12,756 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:00:12,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:00:12,758 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:00:12,758 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:00:12,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:00:12,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:00:12,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:00:12,759 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:00:12,760 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:00:12,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:00:12,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:00:12,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:00:12,761 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:00:12,761 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:00:12,761 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:00:12,762 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:00:12,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:00:12,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:00:12,763 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:00:12,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:00:12,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:00:12,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:00:12,764 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:00:12,764 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:00:12,765 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:00:12,765 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:00:12,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:00:12,765 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:00:12,766 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_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-11-25 18:00:13,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:00:13,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:00:13,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:00:13,220 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:00:13,223 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:00:13,226 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-25 18:00:16,594 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:00:16,860 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:00:16,860 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-11-25 18:00:16,871 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/ea5c69ee9/9bd106efde6a47b19e4205bb827be834/FLAGb6c188c7f [2022-11-25 18:00:16,900 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/data/ea5c69ee9/9bd106efde6a47b19e4205bb827be834 [2022-11-25 18:00:16,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:00:16,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:00:16,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:16,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:00:16,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:00:16,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:16" (1/1) ... [2022-11-25 18:00:16,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719137ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:16, skipping insertion in model container [2022-11-25 18:00:16,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:00:16" (1/1) ... [2022-11-25 18:00:16,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:00:16,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:00:17,152 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,153 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,155 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,158 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,161 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,162 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,163 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,165 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,166 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,168 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,179 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_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-25 18:00:17,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:17,207 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 18:00:17,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:00:17,219 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,220 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,222 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,225 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,227 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,228 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,229 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,236 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_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-25 18:00:17,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:17,248 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:00:17,266 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,267 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,269 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,271 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,272 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,273 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,274 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:00:17,276 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:00:17,282 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_1a32d075-d973-4c7e-ae35-9482a20878c2/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-11-25 18:00:17,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:00:17,308 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:00:17,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17 WrapperNode [2022-11-25 18:00:17,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:00:17,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:00:17,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:00:17,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:00:17,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,372 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 176 [2022-11-25 18:00:17,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:00:17,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:00:17,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:00:17,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:00:17,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,409 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:00:17,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:00:17,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:00:17,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:00:17,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (1/1) ... [2022-11-25 18:00:17,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:00:17,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:00:17,466 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:00:17,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:00:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:00:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:00:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:00:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:00:17,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:00:17,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:00:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:00:17,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:00:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 18:00:17,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 18:00:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:00:17,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:00:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:00:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:00:17,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:00:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:00:17,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:00:17,514 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:00:17,710 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:00:17,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:00:18,399 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:00:18,664 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:00:18,664 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:00:18,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:00:18 BoogieIcfgContainer [2022-11-25 18:00:18,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:00:18,670 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:00:18,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:00:18,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:00:18,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:00:16" (1/3) ... [2022-11-25 18:00:18,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d609f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:00:18, skipping insertion in model container [2022-11-25 18:00:18,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:00:17" (2/3) ... [2022-11-25 18:00:18,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e6d609f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:00:18, skipping insertion in model container [2022-11-25 18:00:18,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:00:18" (3/3) ... [2022-11-25 18:00:18,679 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-11-25 18:00:18,702 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:00:18,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-11-25 18:00:18,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:00:18,825 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:00:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 177 transitions, 378 flow [2022-11-25 18:00:19,028 INFO L130 PetriNetUnfolder]: 9/174 cut-off events. [2022-11-25 18:00:19,028 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:00:19,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 9/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 187 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2022-11-25 18:00:19,036 INFO L82 GeneralOperation]: Start removeDead. Operand has 178 places, 177 transitions, 378 flow [2022-11-25 18:00:19,050 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 169 transitions, 356 flow [2022-11-25 18:00:19,055 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:00:19,073 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 169 transitions, 356 flow [2022-11-25 18:00:19,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 169 transitions, 356 flow [2022-11-25 18:00:19,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 169 transitions, 356 flow [2022-11-25 18:00:19,122 INFO L130 PetriNetUnfolder]: 9/169 cut-off events. [2022-11-25 18:00:19,122 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:00:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 169 events. 9/169 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 187 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2022-11-25 18:00:19,127 INFO L119 LiptonReduction]: Number of co-enabled transitions 2516 [2022-11-25 18:00:47,901 INFO L134 LiptonReduction]: Checked pairs total: 3093 [2022-11-25 18:00:47,902 INFO L136 LiptonReduction]: Total number of compositions: 171 [2022-11-25 18:00:47,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:00:47,925 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;@3e8787c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:00:47,926 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-11-25 18:00:47,928 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:00:47,929 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:00:47,929 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:47,930 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:00:47,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:47,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash 24756, now seen corresponding path program 1 times [2022-11-25 18:00:47,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459534932] [2022-11-25 18:00:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:47,952 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 [2022-11-25 18:00:47,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:47,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:47,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:00:48,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:48,339 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:00:48,340 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:00:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:48,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:48,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:48,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459534932] [2022-11-25 18:00:48,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459534932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:48,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:48,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:48,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524438144] [2022-11-25 18:00:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:48,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:48,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:48,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:00:48,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:48,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:48,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:00:48,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:50,295 INFO L130 PetriNetUnfolder]: 3385/4880 cut-off events. [2022-11-25 18:00:50,295 INFO L131 PetriNetUnfolder]: For 190/190 co-relation queries the response was YES. [2022-11-25 18:00:50,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9951 conditions, 4880 events. 3385/4880 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 23793 event pairs, 2856 based on Foata normal form. 0/1803 useless extension candidates. Maximal degree in co-relation 4290. Up to 2442 conditions per place. [2022-11-25 18:00:50,335 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 82 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2022-11-25 18:00:50,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 84 transitions, 372 flow [2022-11-25 18:00:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2022-11-25 18:00:50,353 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5162835249042146 [2022-11-25 18:00:50,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2022-11-25 18:00:50,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2022-11-25 18:00:50,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:50,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2022-11-25 18:00:50,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:50,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:50,373 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:50,375 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 108 flow. Second operand 3 states and 539 transitions. [2022-11-25 18:00:50,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 84 transitions, 372 flow [2022-11-25 18:00:50,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 84 transitions, 348 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-11-25 18:00:50,385 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 104 flow [2022-11-25 18:00:50,388 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-11-25 18:00:50,392 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2022-11-25 18:00:50,392 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 104 flow [2022-11-25 18:00:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:50,393 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:50,393 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:00:50,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:50,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:50,607 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:50,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:50,608 INFO L85 PathProgramCache]: Analyzing trace with hash 24846, now seen corresponding path program 1 times [2022-11-25 18:00:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:50,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248845897] [2022-11-25 18:00:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:50,610 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 [2022-11-25 18:00:50,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:50,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:50,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:00:50,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:50,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:50,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:50,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:50,952 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 18:00:50,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 18:00:51,000 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 18:00:51,001 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 23 treesize of output 19 [2022-11-25 18:00:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:51,072 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:51,072 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:51,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248845897] [2022-11-25 18:00:51,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248845897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:51,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:51,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:51,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319758017] [2022-11-25 18:00:51,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:51,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:51,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:51,350 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:00:51,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:51,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:51,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:00:51,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:52,311 INFO L130 PetriNetUnfolder]: 2685/3928 cut-off events. [2022-11-25 18:00:52,311 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 18:00:52,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7927 conditions, 3928 events. 2685/3928 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 18652 event pairs, 2256 based on Foata normal form. 0/1555 useless extension candidates. Maximal degree in co-relation 3961. Up to 3928 conditions per place. [2022-11-25 18:00:52,338 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 18:00:52,338 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 42 transitions, 184 flow [2022-11-25 18:00:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2022-11-25 18:00:52,342 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47509578544061304 [2022-11-25 18:00:52,342 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2022-11-25 18:00:52,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2022-11-25 18:00:52,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:52,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2022-11-25 18:00:52,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:52,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:52,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:52,350 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 104 flow. Second operand 3 states and 496 transitions. [2022-11-25 18:00:52,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 42 transitions, 184 flow [2022-11-25 18:00:52,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 42 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:52,354 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 100 flow [2022-11-25 18:00:52,355 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-11-25 18:00:52,356 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2022-11-25 18:00:52,356 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 100 flow [2022-11-25 18:00:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:52,358 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:52,358 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:00:52,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:52,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:52,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:52,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:52,571 INFO L85 PathProgramCache]: Analyzing trace with hash 24847, now seen corresponding path program 1 times [2022-11-25 18:00:52,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:52,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561262175] [2022-11-25 18:00:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:52,572 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 [2022-11-25 18:00:52,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:52,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:52,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:00:52,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:52,776 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 18:00:52,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 18:00:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:52,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:52,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:52,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561262175] [2022-11-25 18:00:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561262175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:52,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:52,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636529857] [2022-11-25 18:00:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:52,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:52,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:52,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:53,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:00:53,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:53,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:53,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:00:53,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:53,870 INFO L130 PetriNetUnfolder]: 1985/2976 cut-off events. [2022-11-25 18:00:53,870 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 18:00:53,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6023 conditions, 2976 events. 1985/2976 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13889 event pairs, 1656 based on Foata normal form. 0/1305 useless extension candidates. Maximal degree in co-relation 6015. Up to 2976 conditions per place. [2022-11-25 18:00:53,897 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 18:00:53,897 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 176 flow [2022-11-25 18:00:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-11-25 18:00:53,901 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4703065134099617 [2022-11-25 18:00:53,901 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-11-25 18:00:53,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-11-25 18:00:53,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:53,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-11-25 18:00:53,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:53,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:53,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:53,907 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 100 flow. Second operand 3 states and 491 transitions. [2022-11-25 18:00:53,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 176 flow [2022-11-25 18:00:53,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:53,908 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 97 flow [2022-11-25 18:00:53,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2022-11-25 18:00:53,910 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2022-11-25 18:00:53,911 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 97 flow [2022-11-25 18:00:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:53,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:53,911 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:00:53,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:54,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:54,124 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:54,125 INFO L85 PathProgramCache]: Analyzing trace with hash 24755, now seen corresponding path program 1 times [2022-11-25 18:00:54,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:54,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636843924] [2022-11-25 18:00:54,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:54,126 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 [2022-11-25 18:00:54,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:54,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:54,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:54,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:00:54,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:54,333 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:00:54,334 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:00:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:54,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:54,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:54,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636843924] [2022-11-25 18:00:54,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636843924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:54,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:54,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:54,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086887895] [2022-11-25 18:00:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:54,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:54,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:54,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 348 [2022-11-25 18:00:54,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:54,532 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:54,532 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 348 [2022-11-25 18:00:54,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:55,178 INFO L130 PetriNetUnfolder]: 1985/2974 cut-off events. [2022-11-25 18:00:55,178 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-11-25 18:00:55,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6020 conditions, 2974 events. 1985/2974 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13870 event pairs, 1656 based on Foata normal form. 0/1305 useless extension candidates. Maximal degree in co-relation 6011. Up to 2974 conditions per place. [2022-11-25 18:00:55,197 INFO L137 encePairwiseOnDemand]: 346/348 looper letters, 38 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2022-11-25 18:00:55,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2022-11-25 18:00:55,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:00:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:00:55,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2022-11-25 18:00:55,199 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46839080459770116 [2022-11-25 18:00:55,199 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2022-11-25 18:00:55,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2022-11-25 18:00:55,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:55,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2022-11-25 18:00:55,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:55,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:55,206 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:55,206 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 97 flow. Second operand 3 states and 489 transitions. [2022-11-25 18:00:55,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2022-11-25 18:00:55,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:55,210 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 96 flow [2022-11-25 18:00:55,211 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2022-11-25 18:00:55,213 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2022-11-25 18:00:55,213 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 96 flow [2022-11-25 18:00:55,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:55,214 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:55,214 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:00:55,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:00:55,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:55,427 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:55,427 INFO L85 PathProgramCache]: Analyzing trace with hash 770523, now seen corresponding path program 1 times [2022-11-25 18:00:55,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:55,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264820293] [2022-11-25 18:00:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:55,428 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 [2022-11-25 18:00:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:55,430 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:55,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:55,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:00:55,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:55,674 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:00:55,674 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:00:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:55,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:56,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:56,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264820293] [2022-11-25 18:00:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264820293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:00:56,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:00:56,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-25 18:00:56,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31177769] [2022-11-25 18:00:56,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:00:56,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:00:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:56,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:00:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:00:57,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 348 [2022-11-25 18:00:57,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:57,429 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:57,429 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 348 [2022-11-25 18:00:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:00:58,951 INFO L130 PetriNetUnfolder]: 2979/4464 cut-off events. [2022-11-25 18:00:58,952 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 18:00:58,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 4464 events. 2979/4464 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22395 event pairs, 2484 based on Foata normal form. 0/1961 useless extension candidates. Maximal degree in co-relation 9025. Up to 1488 conditions per place. [2022-11-25 18:00:58,989 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 107 selfloop transitions, 7 changer transitions 0/114 dead transitions. [2022-11-25 18:00:58,989 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 114 transitions, 492 flow [2022-11-25 18:00:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:00:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:00:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 987 transitions. [2022-11-25 18:00:58,993 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47270114942528735 [2022-11-25 18:00:58,994 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 987 transitions. [2022-11-25 18:00:58,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 987 transitions. [2022-11-25 18:00:58,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:00:58,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 987 transitions. [2022-11-25 18:00:58,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 164.5) internal successors, (987), 6 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:59,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:59,004 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 348.0) internal successors, (2436), 7 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:59,005 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 96 flow. Second operand 6 states and 987 transitions. [2022-11-25 18:00:59,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 114 transitions, 492 flow [2022-11-25 18:00:59,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 114 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:00:59,010 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 149 flow [2022-11-25 18:00:59,011 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2022-11-25 18:00:59,014 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2022-11-25 18:00:59,015 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 149 flow [2022-11-25 18:00:59,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:59,016 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:00:59,016 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:00:59,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:59,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:59,231 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:00:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:00:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash 23894449, now seen corresponding path program 1 times [2022-11-25 18:00:59,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:00:59,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418653821] [2022-11-25 18:00:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:00:59,232 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 [2022-11-25 18:00:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:00:59,234 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:00:59,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:00:59,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:00:59,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:00:59,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:00:59,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:59,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:59,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:00:59,500 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-25 18:00:59,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-25 18:00:59,523 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 14 treesize of output 12 [2022-11-25 18:00:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:00:59,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:00:59,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:00:59,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418653821] [2022-11-25 18:00:59,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418653821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:00:59,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:00:59,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:00:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507303271] [2022-11-25 18:00:59,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:00:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:00:59,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:00:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:00:59,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:00:59,883 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:00:59,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:00:59,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:00:59,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:00:59,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:00,851 INFO L130 PetriNetUnfolder]: 2829/4224 cut-off events. [2022-11-25 18:01:00,851 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2022-11-25 18:01:00,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8581 conditions, 4224 events. 2829/4224 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20945 event pairs, 2352 based on Foata normal form. 0/1911 useless extension candidates. Maximal degree in co-relation 8566. Up to 4224 conditions per place. [2022-11-25 18:01:00,883 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 41 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2022-11-25 18:01:00,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 229 flow [2022-11-25 18:01:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:01:00,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:01:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 491 transitions. [2022-11-25 18:01:00,886 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4703065134099617 [2022-11-25 18:01:00,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 491 transitions. [2022-11-25 18:01:00,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 491 transitions. [2022-11-25 18:01:00,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:00,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 491 transitions. [2022-11-25 18:01:00,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:00,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:00,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:00,893 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 149 flow. Second operand 3 states and 491 transitions. [2022-11-25 18:01:00,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 229 flow [2022-11-25 18:01:00,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 42 transitions, 219 flow, removed 4 selfloop flow, removed 1 redundant places. [2022-11-25 18:01:00,896 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 137 flow [2022-11-25 18:01:00,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2022-11-25 18:01:00,897 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2022-11-25 18:01:00,897 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 137 flow [2022-11-25 18:01:00,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:00,898 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:00,898 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:01:00,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:01,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:01,112 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash 23894450, now seen corresponding path program 1 times [2022-11-25 18:01:01,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:01,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913861869] [2022-11-25 18:01:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:01,114 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 [2022-11-25 18:01:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:01,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:01,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:01,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:01:01,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:01,317 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-25 18:01:01,317 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 29 treesize of output 44 [2022-11-25 18:01:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:01,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:01,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913861869] [2022-11-25 18:01:01,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913861869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:01,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:01,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:01:01,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995511812] [2022-11-25 18:01:01,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:01,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:01:01,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:01,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:01:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:01:01,492 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2022-11-25 18:01:01,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:01,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:01,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2022-11-25 18:01:01,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:02,282 INFO L130 PetriNetUnfolder]: 2679/3984 cut-off events. [2022-11-25 18:01:02,282 INFO L131 PetriNetUnfolder]: For 70/70 co-relation queries the response was YES. [2022-11-25 18:01:02,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8098 conditions, 3984 events. 2679/3984 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 19507 event pairs, 2220 based on Foata normal form. 0/1860 useless extension candidates. Maximal degree in co-relation 8082. Up to 3984 conditions per place. [2022-11-25 18:01:02,307 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 39 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2022-11-25 18:01:02,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2022-11-25 18:01:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:01:02,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:01:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2022-11-25 18:01:02,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45689655172413796 [2022-11-25 18:01:02,310 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2022-11-25 18:01:02,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2022-11-25 18:01:02,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:02,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2022-11-25 18:01:02,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:02,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:02,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:02,315 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 137 flow. Second operand 3 states and 477 transitions. [2022-11-25 18:01:02,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2022-11-25 18:01:02,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:01:02,318 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 134 flow [2022-11-25 18:01:02,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2022-11-25 18:01:02,319 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2022-11-25 18:01:02,319 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 134 flow [2022-11-25 18:01:02,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:02,320 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:02,320 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:01:02,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:02,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:02,534 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash 740726784, now seen corresponding path program 1 times [2022-11-25 18:01:02,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:02,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342106195] [2022-11-25 18:01:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:02,536 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 [2022-11-25 18:01:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:02,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:02,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:01:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:02,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:02,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:02,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342106195] [2022-11-25 18:01:02,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342106195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:02,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:02,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:01:02,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800986735] [2022-11-25 18:01:02,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:02,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:01:02,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:02,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:01:02,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:01:02,781 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:01:02,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:02,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:02,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:01:02,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:03,570 INFO L130 PetriNetUnfolder]: 1836/2737 cut-off events. [2022-11-25 18:01:03,570 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:01:03,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5581 conditions, 2737 events. 1836/2737 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 12413 event pairs, 1503 based on Foata normal form. 8/1321 useless extension candidates. Maximal degree in co-relation 5564. Up to 2659 conditions per place. [2022-11-25 18:01:03,587 INFO L137 encePairwiseOnDemand]: 335/348 looper letters, 47 selfloop transitions, 3 changer transitions 3/53 dead transitions. [2022-11-25 18:01:03,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 273 flow [2022-11-25 18:01:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:01:03,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:01:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 662 transitions. [2022-11-25 18:01:03,591 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4755747126436782 [2022-11-25 18:01:03,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 662 transitions. [2022-11-25 18:01:03,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 662 transitions. [2022-11-25 18:01:03,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:03,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 662 transitions. [2022-11-25 18:01:03,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 165.5) internal successors, (662), 4 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) [2022-11-25 18:01:03,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:03,597 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:03,598 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 134 flow. Second operand 4 states and 662 transitions. [2022-11-25 18:01:03,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 273 flow [2022-11-25 18:01:03,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:01:03,600 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 171 flow [2022-11-25 18:01:03,601 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2022-11-25 18:01:03,601 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2022-11-25 18:01:03,602 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 171 flow [2022-11-25 18:01:03,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:03,602 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:03,603 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:01:03,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:03,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:03,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:03,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:03,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1483035001, now seen corresponding path program 1 times [2022-11-25 18:01:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:03,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814511076] [2022-11-25 18:01:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:03,827 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 [2022-11-25 18:01:03,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:03,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:03,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:01:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:04,138 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:01:04,138 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:01:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:04,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:05,210 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:05,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814511076] [2022-11-25 18:01:05,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814511076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:05,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:01:05,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2022-11-25 18:01:05,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18227418] [2022-11-25 18:01:05,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:05,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:01:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:01:05,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:01:08,878 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 348 [2022-11-25 18:01:08,879 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 171 flow. Second operand has 8 states, 8 states have (on average 142.5) internal successors, (1140), 8 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:08,879 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:08,879 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 348 [2022-11-25 18:01:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:14,503 INFO L130 PetriNetUnfolder]: 1729/2609 cut-off events. [2022-11-25 18:01:14,503 INFO L131 PetriNetUnfolder]: For 235/235 co-relation queries the response was YES. [2022-11-25 18:01:14,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 2609 events. 1729/2609 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11622 event pairs, 1373 based on Foata normal form. 44/1705 useless extension candidates. Maximal degree in co-relation 6565. Up to 1325 conditions per place. [2022-11-25 18:01:14,523 INFO L137 encePairwiseOnDemand]: 338/348 looper letters, 89 selfloop transitions, 11 changer transitions 4/104 dead transitions. [2022-11-25 18:01:14,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 104 transitions, 549 flow [2022-11-25 18:01:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:01:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-25 18:01:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1522 transitions. [2022-11-25 18:01:14,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43735632183908046 [2022-11-25 18:01:14,532 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1522 transitions. [2022-11-25 18:01:14,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1522 transitions. [2022-11-25 18:01:14,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:14,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1522 transitions. [2022-11-25 18:01:14,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 152.2) internal successors, (1522), 10 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:14,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:14,547 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 348.0) internal successors, (3828), 11 states have internal predecessors, (3828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:14,548 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 171 flow. Second operand 10 states and 1522 transitions. [2022-11-25 18:01:14,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 104 transitions, 549 flow [2022-11-25 18:01:14,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 104 transitions, 539 flow, removed 3 selfloop flow, removed 2 redundant places. [2022-11-25 18:01:14,552 INFO L231 Difference]: Finished difference. Result has 64 places, 42 transitions, 210 flow [2022-11-25 18:01:14,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=210, PETRI_PLACES=64, PETRI_TRANSITIONS=42} [2022-11-25 18:01:14,554 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2022-11-25 18:01:14,554 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 42 transitions, 210 flow [2022-11-25 18:01:14,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 142.5) internal successors, (1140), 8 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:14,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:14,555 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:01:14,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:14,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:14,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1482879604, now seen corresponding path program 2 times [2022-11-25 18:01:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:14,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649912439] [2022-11-25 18:01:14,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:01:14,769 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 [2022-11-25 18:01:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:14,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:14,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:14,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:01:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:01:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:15,074 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:01:15,074 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:01:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:15,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:16,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:16,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649912439] [2022-11-25 18:01:16,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649912439] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:16,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:01:16,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-25 18:01:16,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797835280] [2022-11-25 18:01:16,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:16,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:01:16,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:01:16,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:01:21,545 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 348 [2022-11-25 18:01:21,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 42 transitions, 210 flow. Second operand has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:21,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:21,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 348 [2022-11-25 18:01:21,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:29,014 INFO L130 PetriNetUnfolder]: 6782/10128 cut-off events. [2022-11-25 18:01:29,014 INFO L131 PetriNetUnfolder]: For 3851/3851 co-relation queries the response was YES. [2022-11-25 18:01:29,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29533 conditions, 10128 events. 6782/10128 cut-off events. For 3851/3851 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 56281 event pairs, 5542 based on Foata normal form. 6/7020 useless extension candidates. Maximal degree in co-relation 29511. Up to 5225 conditions per place. [2022-11-25 18:01:29,088 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 278 selfloop transitions, 12 changer transitions 4/294 dead transitions. [2022-11-25 18:01:29,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 294 transitions, 1648 flow [2022-11-25 18:01:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:01:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:01:29,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2052 transitions. [2022-11-25 18:01:29,097 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49137931034482757 [2022-11-25 18:01:29,097 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2052 transitions. [2022-11-25 18:01:29,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2052 transitions. [2022-11-25 18:01:29,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:29,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2052 transitions. [2022-11-25 18:01:29,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:29,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:29,113 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 348.0) internal successors, (4524), 13 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:29,113 INFO L175 Difference]: Start difference. First operand has 64 places, 42 transitions, 210 flow. Second operand 12 states and 2052 transitions. [2022-11-25 18:01:29,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 294 transitions, 1648 flow [2022-11-25 18:01:29,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 294 transitions, 1580 flow, removed 11 selfloop flow, removed 9 redundant places. [2022-11-25 18:01:29,129 INFO L231 Difference]: Finished difference. Result has 73 places, 49 transitions, 257 flow [2022-11-25 18:01:29,130 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=257, PETRI_PLACES=73, PETRI_TRANSITIONS=49} [2022-11-25 18:01:29,130 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2022-11-25 18:01:29,130 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 49 transitions, 257 flow [2022-11-25 18:01:29,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:29,132 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:29,132 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:01:29,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:29,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:29,347 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:29,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1483035000, now seen corresponding path program 1 times [2022-11-25 18:01:29,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:29,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281908186] [2022-11-25 18:01:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:29,349 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 [2022-11-25 18:01:29,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:29,350 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:29,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:29,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:01:29,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:29,575 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 18:01:29,575 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 18:01:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:01:29,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:29,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:29,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281908186] [2022-11-25 18:01:29,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281908186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:29,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:29,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:01:29,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991713899] [2022-11-25 18:01:29,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:29,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:01:29,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:29,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:01:29,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:01:29,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 348 [2022-11-25 18:01:29,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 49 transitions, 257 flow. Second operand has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:29,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:29,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 348 [2022-11-25 18:01:29,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:30,887 INFO L130 PetriNetUnfolder]: 3711/5643 cut-off events. [2022-11-25 18:01:30,887 INFO L131 PetriNetUnfolder]: For 2424/2424 co-relation queries the response was YES. [2022-11-25 18:01:30,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16209 conditions, 5643 events. 3711/5643 cut-off events. For 2424/2424 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28786 event pairs, 2843 based on Foata normal form. 0/4683 useless extension candidates. Maximal degree in co-relation 16184. Up to 5630 conditions per place. [2022-11-25 18:01:30,925 INFO L137 encePairwiseOnDemand]: 343/348 looper letters, 39 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2022-11-25 18:01:30,925 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 46 transitions, 335 flow [2022-11-25 18:01:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:01:30,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:01:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2022-11-25 18:01:30,929 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382183908045977 [2022-11-25 18:01:30,929 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2022-11-25 18:01:30,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2022-11-25 18:01:30,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:30,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2022-11-25 18:01:30,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:30,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:30,935 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:30,935 INFO L175 Difference]: Start difference. First operand has 73 places, 49 transitions, 257 flow. Second operand 4 states and 610 transitions. [2022-11-25 18:01:30,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 46 transitions, 335 flow [2022-11-25 18:01:30,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 46 transitions, 313 flow, removed 7 selfloop flow, removed 4 redundant places. [2022-11-25 18:01:30,943 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 235 flow [2022-11-25 18:01:30,944 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=235, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2022-11-25 18:01:30,944 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2022-11-25 18:01:30,945 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 235 flow [2022-11-25 18:01:30,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:30,945 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:30,945 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:01:30,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-25 18:01:31,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:31,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:31,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1487749279, now seen corresponding path program 1 times [2022-11-25 18:01:31,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:31,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124024428] [2022-11-25 18:01:31,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:31,161 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 [2022-11-25 18:01:31,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:31,162 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:31,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:01:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:01:31,441 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 18:01:31,442 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 18:01:31,477 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 312 treesize of output 296 [2022-11-25 18:01:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:31,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:31,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:31,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124024428] [2022-11-25 18:01:31,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124024428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:31,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:31,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:01:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705526046] [2022-11-25 18:01:31,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:31,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:01:31,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:31,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:01:31,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:01:31,745 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 348 [2022-11-25 18:01:31,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:31,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:31,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 348 [2022-11-25 18:01:31,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:32,604 INFO L130 PetriNetUnfolder]: 3160/4788 cut-off events. [2022-11-25 18:01:32,604 INFO L131 PetriNetUnfolder]: For 2170/2170 co-relation queries the response was YES. [2022-11-25 18:01:32,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13992 conditions, 4788 events. 3160/4788 cut-off events. For 2170/2170 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23549 event pairs, 2437 based on Foata normal form. 0/4071 useless extension candidates. Maximal degree in co-relation 13966. Up to 4788 conditions per place. [2022-11-25 18:01:32,643 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 43 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2022-11-25 18:01:32,643 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 44 transitions, 319 flow [2022-11-25 18:01:32,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:01:32,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:01:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 484 transitions. [2022-11-25 18:01:32,645 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.46360153256704983 [2022-11-25 18:01:32,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 484 transitions. [2022-11-25 18:01:32,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 484 transitions. [2022-11-25 18:01:32,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:32,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 484 transitions. [2022-11-25 18:01:32,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:32,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:32,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:32,651 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 235 flow. Second operand 3 states and 484 transitions. [2022-11-25 18:01:32,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 44 transitions, 319 flow [2022-11-25 18:01:32,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 44 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:01:32,658 INFO L231 Difference]: Finished difference. Result has 67 places, 44 transitions, 225 flow [2022-11-25 18:01:32,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=67, PETRI_TRANSITIONS=44} [2022-11-25 18:01:32,659 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2022-11-25 18:01:32,659 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 44 transitions, 225 flow [2022-11-25 18:01:32,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:32,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:32,660 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:01:32,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:32,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:32,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:32,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1487749277, now seen corresponding path program 1 times [2022-11-25 18:01:32,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:32,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739640206] [2022-11-25 18:01:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:01:32,874 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 [2022-11-25 18:01:32,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:32,875 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:32,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:01:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:01:32,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:33,088 INFO L321 Elim1Store]: treesize reduction 88, result has 30.7 percent of original size [2022-11-25 18:01:33,089 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 3 case distinctions, treesize of input 15 treesize of output 46 [2022-11-25 18:01:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:33,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:33,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:33,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739640206] [2022-11-25 18:01:33,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739640206] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:33,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:33,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:01:33,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901608898] [2022-11-25 18:01:33,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:33,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:01:33,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:33,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:01:33,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:01:33,273 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2022-11-25 18:01:33,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 44 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:33,274 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:33,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2022-11-25 18:01:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:33,979 INFO L130 PetriNetUnfolder]: 2903/4384 cut-off events. [2022-11-25 18:01:33,979 INFO L131 PetriNetUnfolder]: For 1970/1970 co-relation queries the response was YES. [2022-11-25 18:01:33,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12938 conditions, 4384 events. 2903/4384 cut-off events. For 1970/1970 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 21149 event pairs, 2244 based on Foata normal form. 0/3828 useless extension candidates. Maximal degree in co-relation 12912. Up to 4384 conditions per place. [2022-11-25 18:01:33,999 INFO L137 encePairwiseOnDemand]: 345/348 looper letters, 39 selfloop transitions, 1 changer transitions 2/42 dead transitions. [2022-11-25 18:01:34,000 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 42 transitions, 305 flow [2022-11-25 18:01:34,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:01:34,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:01:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2022-11-25 18:01:34,004 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4501915708812261 [2022-11-25 18:01:34,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2022-11-25 18:01:34,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2022-11-25 18:01:34,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:34,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2022-11-25 18:01:34,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:34,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:34,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:34,009 INFO L175 Difference]: Start difference. First operand has 67 places, 44 transitions, 225 flow. Second operand 3 states and 470 transitions. [2022-11-25 18:01:34,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 42 transitions, 305 flow [2022-11-25 18:01:34,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 42 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:01:34,017 INFO L231 Difference]: Finished difference. Result has 66 places, 40 transitions, 209 flow [2022-11-25 18:01:34,017 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=66, PETRI_TRANSITIONS=40} [2022-11-25 18:01:34,019 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2022-11-25 18:01:34,019 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 40 transitions, 209 flow [2022-11-25 18:01:34,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:34,020 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:34,020 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2022-11-25 18:01:34,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:34,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:34,234 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:34,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1564103104, now seen corresponding path program 2 times [2022-11-25 18:01:34,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:34,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030494262] [2022-11-25 18:01:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:01:34,235 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 [2022-11-25 18:01:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:34,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:34,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:34,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:01:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:01:34,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:34,514 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:01:34,514 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:01:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:01:34,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:01:34,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:34,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030494262] [2022-11-25 18:01:34,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030494262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:01:34,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:01:34,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:01:34,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002023248] [2022-11-25 18:01:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:01:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:01:34,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:01:34,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:01:35,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 348 [2022-11-25 18:01:35,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 40 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:35,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:01:35,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 348 [2022-11-25 18:01:35,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:01:35,621 INFO L130 PetriNetUnfolder]: 948/1513 cut-off events. [2022-11-25 18:01:35,621 INFO L131 PetriNetUnfolder]: For 1558/1558 co-relation queries the response was YES. [2022-11-25 18:01:35,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 1513 events. 948/1513 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6193 event pairs, 651 based on Foata normal form. 252/1765 useless extension candidates. Maximal degree in co-relation 3829. Up to 1500 conditions per place. [2022-11-25 18:01:35,631 INFO L137 encePairwiseOnDemand]: 342/348 looper letters, 31 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2022-11-25 18:01:35,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 36 transitions, 253 flow [2022-11-25 18:01:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:01:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:01:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2022-11-25 18:01:35,635 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418103448275862 [2022-11-25 18:01:35,635 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2022-11-25 18:01:35,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2022-11-25 18:01:35,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:01:35,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2022-11-25 18:01:35,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:35,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:35,641 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:35,641 INFO L175 Difference]: Start difference. First operand has 66 places, 40 transitions, 209 flow. Second operand 4 states and 615 transitions. [2022-11-25 18:01:35,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 36 transitions, 253 flow [2022-11-25 18:01:35,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 36 transitions, 248 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-25 18:01:35,649 INFO L231 Difference]: Finished difference. Result has 59 places, 36 transitions, 186 flow [2022-11-25 18:01:35,649 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=59, PETRI_TRANSITIONS=36} [2022-11-25 18:01:35,650 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2022-11-25 18:01:35,650 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 36 transitions, 186 flow [2022-11-25 18:01:35,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.5) internal successors, (594), 4 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:01:35,651 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:01:35,651 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2022-11-25 18:01:35,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:01:35,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:35,863 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:01:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:01:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -426776300, now seen corresponding path program 3 times [2022-11-25 18:01:35,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:01:35,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961500863] [2022-11-25 18:01:35,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:01:35,864 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 [2022-11-25 18:01:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:01:35,865 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:01:35,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:01:36,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 18:01:36,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:01:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 18:01:36,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:01:36,300 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 18:01:36,300 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 18:01:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:36,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:01:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:01:40,659 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:01:40,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961500863] [2022-11-25 18:01:40,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961500863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:01:40,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:01:40,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-25 18:01:40,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770733309] [2022-11-25 18:01:40,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:01:40,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:01:40,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:01:40,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:01:40,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:02:07,304 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 348 [2022-11-25 18:02:07,307 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 36 transitions, 186 flow. Second operand has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:07,307 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:02:07,307 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 348 [2022-11-25 18:02:07,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:02:33,490 INFO L130 PetriNetUnfolder]: 2702/4306 cut-off events. [2022-11-25 18:02:33,491 INFO L131 PetriNetUnfolder]: For 1147/1147 co-relation queries the response was YES. [2022-11-25 18:02:33,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10405 conditions, 4306 events. 2702/4306 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 20071 event pairs, 1860 based on Foata normal form. 12/4318 useless extension candidates. Maximal degree in co-relation 10379. Up to 1361 conditions per place. [2022-11-25 18:02:33,506 INFO L137 encePairwiseOnDemand]: 344/348 looper letters, 402 selfloop transitions, 24 changer transitions 0/426 dead transitions. [2022-11-25 18:02:33,507 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 426 transitions, 2254 flow [2022-11-25 18:02:33,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:02:33,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:02:33,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3942 transitions. [2022-11-25 18:02:33,518 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47198275862068967 [2022-11-25 18:02:33,518 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3942 transitions. [2022-11-25 18:02:33,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3942 transitions. [2022-11-25 18:02:33,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:02:33,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3942 transitions. [2022-11-25 18:02:33,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 164.25) internal successors, (3942), 24 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:33,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 348.0) internal successors, (8700), 25 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:33,544 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 348.0) internal successors, (8700), 25 states have internal predecessors, (8700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:33,544 INFO L175 Difference]: Start difference. First operand has 59 places, 36 transitions, 186 flow. Second operand 24 states and 3942 transitions. [2022-11-25 18:02:33,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 426 transitions, 2254 flow [2022-11-25 18:02:33,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 426 transitions, 2231 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:02:33,554 INFO L231 Difference]: Finished difference. Result has 93 places, 49 transitions, 367 flow [2022-11-25 18:02:33,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=367, PETRI_PLACES=93, PETRI_TRANSITIONS=49} [2022-11-25 18:02:33,555 INFO L288 CegarLoopForPetriNet]: 52 programPoint places, 41 predicate places. [2022-11-25 18:02:33,555 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 49 transitions, 367 flow [2022-11-25 18:02:33,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.0) internal successors, (3528), 24 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:02:33,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:02:33,556 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:02:33,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:02:33,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:02:33,769 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-11-25 18:02:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:02:33,770 INFO L85 PathProgramCache]: Analyzing trace with hash -33224658, now seen corresponding path program 1 times [2022-11-25 18:02:33,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:02:33,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223914958] [2022-11-25 18:02:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:02:33,771 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 [2022-11-25 18:02:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:02:33,772 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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) [2022-11-25 18:02:33,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a32d075-d973-4c7e-ae35-9482a20878c2/bin/uautomizer-ZsLfNo2U6R/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 [2022-11-25 18:02:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:02:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-25 18:02:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:02:34,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:02:34,175 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-11-25 18:02:34,175 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 2 case distinctions, treesize of input 17 treesize of output 40 [2022-11-25 18:02:34,209 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 167 treesize of output 163 [2022-11-25 18:02:34,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 13 [2022-11-25 18:02:34,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:02:34,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-25 18:02:35,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:35,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 245 treesize of output 59 [2022-11-25 18:02:35,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:02:35,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:02:39,494 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2022-11-25 18:02:39,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 608 treesize of output 674 [2022-11-25 18:02:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 18:02:39,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:02:39,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 58 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 8 case distinctions, treesize of input 409 treesize of output 347 [2022-11-25 18:02:41,176 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2022-11-25 18:02:41,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 255 treesize of output 353