./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:33:13,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:33:13,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:33:13,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:33:13,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:33:13,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:33:13,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:33:13,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:33:13,586 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:33:13,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:33:13,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:33:13,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:33:13,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:33:13,590 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:33:13,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:33:13,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:33:13,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:33:13,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:33:13,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:33:13,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:33:13,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:33:13,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:33:13,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:33:13,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:33:13,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:33:13,604 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:33:13,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:33:13,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:33:13,605 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:33:13,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:33:13,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:33:13,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:33:13,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:33:13,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:33:13,609 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:33:13,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:33:13,610 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:33:13,610 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:33:13,611 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:33:13,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:33:13,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:33:13,613 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 13:33:13,631 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:33:13,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:33:13,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:33:13,632 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:33:13,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:33:13,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:33:13,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:33:13,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:33:13,634 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:33:13,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:33:13,634 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:33:13,634 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:33:13,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:33:13,635 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:33:13,636 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:33:13,636 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:33:13,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:33:13,636 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:33:13,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:33:13,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:33:13,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:33:13,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:33:13,638 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:33:13,638 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_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-12-13 13:33:13,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:33:13,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:33:13,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:33:13,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:33:13,851 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:33:13,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-13 13:33:16,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:33:16,612 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:33:16,612 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-13 13:33:16,617 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/0f42493a4/3b76aa68777b48d4b9b4711105ecbee8/FLAG4fd64d31e [2022-12-13 13:33:16,630 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/0f42493a4/3b76aa68777b48d4b9b4711105ecbee8 [2022-12-13 13:33:16,632 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:33:16,634 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:33:16,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:33:16,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:33:16,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:33:16,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:33:16" (1/1) ... [2022-12-13 13:33:16,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab5dc25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:16, skipping insertion in model container [2022-12-13 13:33:16,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:33:16" (1/1) ... [2022-12-13 13:33:16,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:33:16,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:33:16,798 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_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-13 13:33:16,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:33:16,820 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-13 13:33:16,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4fa68624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:16, skipping insertion in model container [2022-12-13 13:33:16,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:33:16,822 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-13 13:33:16,823 INFO L158 Benchmark]: Toolchain (without parser) took 188.86ms. Allocated memory is still 136.3MB. Free memory was 105.2MB in the beginning and 95.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:33:16,824 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 13:33:16,825 INFO L158 Benchmark]: CACSL2BoogieTranslator took 186.85ms. Allocated memory is still 136.3MB. Free memory was 105.0MB in the beginning and 95.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 13:33:16,826 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 107.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 186.85ms. Allocated memory is still 136.3MB. Free memory was 105.0MB in the beginning and 95.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 13:33:18,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 13:33:18,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 13:33:18,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 13:33:18,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 13:33:18,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 13:33:18,294 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 13:33:18,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 13:33:18,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 13:33:18,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 13:33:18,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 13:33:18,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 13:33:18,301 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 13:33:18,302 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 13:33:18,303 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 13:33:18,304 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 13:33:18,305 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 13:33:18,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 13:33:18,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 13:33:18,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 13:33:18,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 13:33:18,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 13:33:18,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 13:33:18,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 13:33:18,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 13:33:18,318 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 13:33:18,318 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 13:33:18,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 13:33:18,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 13:33:18,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 13:33:18,321 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 13:33:18,322 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 13:33:18,323 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 13:33:18,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 13:33:18,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 13:33:18,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 13:33:18,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 13:33:18,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 13:33:18,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 13:33:18,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 13:33:18,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 13:33:18,328 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-12-13 13:33:18,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 13:33:18,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 13:33:18,351 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 13:33:18,351 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 13:33:18,352 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 13:33:18,352 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 13:33:18,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 13:33:18,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 13:33:18,353 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 13:33:18,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 13:33:18,354 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 13:33:18,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 13:33:18,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 13:33:18,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 13:33:18,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 13:33:18,355 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 13:33:18,355 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 13:33:18,355 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 13:33:18,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 13:33:18,355 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 13:33:18,356 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-13 13:33:18,356 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-13 13:33:18,356 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 13:33:18,356 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 13:33:18,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 13:33:18,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 13:33:18,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 13:33:18,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:33:18,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 13:33:18,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 13:33:18,358 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-12-13 13:33:18,362 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-13 13:33:18,362 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 13:33:18,362 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 13:33:18,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 13:33:18,363 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-12-13 13:33:18,363 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 13:33:18,363 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_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6aa6ef36156b11d9501f41a7beea3c182ea6a120d3ddbfd55ede5953f5f6e32 [2022-12-13 13:33:18,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 13:33:18,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 13:33:18,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 13:33:18,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 13:33:18,587 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 13:33:18,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-13 13:33:21,108 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 13:33:21,283 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 13:33:21,283 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2022-12-13 13:33:21,289 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/f3969739f/7e9dbad2212f488ab45ad22ca0bbb1ce/FLAGb931b209a [2022-12-13 13:33:21,666 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/data/f3969739f/7e9dbad2212f488ab45ad22ca0bbb1ce [2022-12-13 13:33:21,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 13:33:21,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 13:33:21,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 13:33:21,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 13:33:21,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 13:33:21,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a187785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21, skipping insertion in model container [2022-12-13 13:33:21,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,683 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 13:33:21,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:33:21,832 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_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-13 13:33:21,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:33:21,856 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-13 13:33:21,860 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 13:33:21,876 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_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-13 13:33:21,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:33:21,886 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 13:33:21,905 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_359ee086-92dc-41ee-931a-8234dd69f002/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c[2781,2794] [2022-12-13 13:33:21,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 13:33:21,925 INFO L208 MainTranslator]: Completed translation [2022-12-13 13:33:21,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21 WrapperNode [2022-12-13 13:33:21,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 13:33:21,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 13:33:21,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 13:33:21,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 13:33:21,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,953 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,980 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 272 [2022-12-13 13:33:21,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 13:33:21,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 13:33:21,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 13:33:21,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 13:33:21,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:21,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,006 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,008 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 13:33:22,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 13:33:22,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 13:33:22,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 13:33:22,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (1/1) ... [2022-12-13 13:33:22,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 13:33:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 13:33:22,032 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 13:33:22,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 13:33:22,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 13:33:22,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-13 13:33:22,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-13 13:33:22,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-13 13:33:22,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-13 13:33:22,066 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 13:33:22,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 13:33:22,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-13 13:33:22,067 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 13:33:22,175 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 13:33:22,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 13:33:22,825 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 13:33:22,836 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 13:33:22,836 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 13:33:22,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:33:22 BoogieIcfgContainer [2022-12-13 13:33:22,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 13:33:22,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 13:33:22,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 13:33:22,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 13:33:22,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 01:33:21" (1/3) ... [2022-12-13 13:33:22,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6171f3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:33:22, skipping insertion in model container [2022-12-13 13:33:22,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 01:33:21" (2/3) ... [2022-12-13 13:33:22,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6171f3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 01:33:22, skipping insertion in model container [2022-12-13 13:33:22,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 01:33:22" (3/3) ... [2022-12-13 13:33:22,843 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2022-12-13 13:33:22,857 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 13:33:22,857 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-12-13 13:33:22,857 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 13:33:22,938 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 13:33:22,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 376 places, 395 transitions, 814 flow [2022-12-13 13:33:23,073 INFO L130 PetriNetUnfolder]: 29/392 cut-off events. [2022-12-13 13:33:23,073 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:33:23,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405 conditions, 392 events. 29/392 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 846 event pairs, 0 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-12-13 13:33:23,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 376 places, 395 transitions, 814 flow [2022-12-13 13:33:23,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 387 transitions, 792 flow [2022-12-13 13:33:23,092 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 13:33:23,100 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 368 places, 387 transitions, 792 flow [2022-12-13 13:33:23,102 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 368 places, 387 transitions, 792 flow [2022-12-13 13:33:23,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 387 transitions, 792 flow [2022-12-13 13:33:23,165 INFO L130 PetriNetUnfolder]: 29/387 cut-off events. [2022-12-13 13:33:23,165 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 13:33:23,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 387 events. 29/387 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 841 event pairs, 0 based on Foata normal form. 0/315 useless extension candidates. Maximal degree in co-relation 290. Up to 3 conditions per place. [2022-12-13 13:33:23,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 25650 [2022-12-13 13:33:59,887 INFO L134 LiptonReduction]: Checked pairs total: 40601 [2022-12-13 13:33:59,888 INFO L136 LiptonReduction]: Total number of compositions: 468 [2022-12-13 13:33:59,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 13:33:59,902 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;@452adb8b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 13:33:59,902 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-12-13 13:33:59,904 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-12-13 13:33:59,904 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 13:33:59,904 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:33:59,904 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:33:59,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:33:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:33:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 50049, now seen corresponding path program 1 times [2022-12-13 13:33:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:33:59,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985804253] [2022-12-13 13:33:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:33:59,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:33:59,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:33:59,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:33:59,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-13 13:33:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:33:59,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:33:59,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:00,146 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:34:00,147 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 [2022-12-13 13:34:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:00,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:00,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:00,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985804253] [2022-12-13 13:34:00,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985804253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:00,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:00,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:00,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452612139] [2022-12-13 13:34:00,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:00,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:00,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:00,626 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 863 [2022-12-13 13:34:00,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:00,630 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:00,630 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 863 [2022-12-13 13:34:00,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:06,244 INFO L130 PetriNetUnfolder]: 34363/47072 cut-off events. [2022-12-13 13:34:06,244 INFO L131 PetriNetUnfolder]: For 818/818 co-relation queries the response was YES. [2022-12-13 13:34:06,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94995 conditions, 47072 events. 34363/47072 cut-off events. For 818/818 co-relation queries the response was YES. Maximal size of possible extension queue 2474. Compared 283883 event pairs, 29206 based on Foata normal form. 0/15917 useless extension candidates. Maximal degree in co-relation 45010. Up to 23469 conditions per place. [2022-12-13 13:34:06,469 INFO L137 encePairwiseOnDemand]: 849/863 looper letters, 136 selfloop transitions, 6 changer transitions 0/143 dead transitions. [2022-12-13 13:34:06,469 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 143 transitions, 606 flow [2022-12-13 13:34:06,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:06,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1214 transitions. [2022-12-13 13:34:06,483 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4689069138663577 [2022-12-13 13:34:06,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1214 transitions. [2022-12-13 13:34:06,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1214 transitions. [2022-12-13 13:34:06,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:06,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1214 transitions. [2022-12-13 13:34:06,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.6666666666667) internal successors, (1214), 3 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:06,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:06,502 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:06,504 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 176 flow. Second operand 3 states and 1214 transitions. [2022-12-13 13:34:06,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 143 transitions, 606 flow [2022-12-13 13:34:06,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 143 transitions, 582 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-12-13 13:34:06,517 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 204 flow [2022-12-13 13:34:06,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2022-12-13 13:34:06,521 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -7 predicate places. [2022-12-13 13:34:06,521 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 204 flow [2022-12-13 13:34:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:06,522 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:06,522 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 13:34:06,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-13 13:34:06,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:06,724 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:34:06,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:06,724 INFO L85 PathProgramCache]: Analyzing trace with hash 50048, now seen corresponding path program 1 times [2022-12-13 13:34:06,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35159995] [2022-12-13 13:34:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:06,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:06,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:06,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-13 13:34:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:06,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 13:34:06,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:06,923 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:34:06,923 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 [2022-12-13 13:34:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:06,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:06,935 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35159995] [2022-12-13 13:34:06,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35159995] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:06,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:06,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 13:34:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837919842] [2022-12-13 13:34:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:06,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 13:34:06,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 13:34:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 13:34:07,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 353 out of 863 [2022-12-13 13:34:07,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:07,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:07,104 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 353 of 863 [2022-12-13 13:34:07,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:11,474 INFO L130 PetriNetUnfolder]: 34363/47066 cut-off events. [2022-12-13 13:34:11,474 INFO L131 PetriNetUnfolder]: For 138/138 co-relation queries the response was YES. [2022-12-13 13:34:11,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94410 conditions, 47066 events. 34363/47066 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 2822. Compared 286483 event pairs, 29206 based on Foata normal form. 4/15871 useless extension candidates. Maximal degree in co-relation 47185. Up to 46926 conditions per place. [2022-12-13 13:34:11,658 INFO L137 encePairwiseOnDemand]: 859/863 looper letters, 74 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2022-12-13 13:34:11,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 76 transitions, 348 flow [2022-12-13 13:34:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1132 transitions. [2022-12-13 13:34:11,664 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4372344534569332 [2022-12-13 13:34:11,664 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1132 transitions. [2022-12-13 13:34:11,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1132 transitions. [2022-12-13 13:34:11,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:11,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1132 transitions. [2022-12-13 13:34:11,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 377.3333333333333) internal successors, (1132), 3 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:11,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:11,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:11,673 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 204 flow. Second operand 3 states and 1132 transitions. [2022-12-13 13:34:11,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 76 transitions, 348 flow [2022-12-13 13:34:11,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 76 transitions, 336 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:34:11,675 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 188 flow [2022-12-13 13:34:11,675 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2022-12-13 13:34:11,676 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -10 predicate places. [2022-12-13 13:34:11,676 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 188 flow [2022-12-13 13:34:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 353.6666666666667) internal successors, (1061), 3 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:11,677 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:11,677 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 13:34:11,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-13 13:34:11,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:11,879 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:34:11,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1561454, now seen corresponding path program 1 times [2022-12-13 13:34:11,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:11,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [339476483] [2022-12-13 13:34:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:11,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:11,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:11,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-13 13:34:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:11,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:34:11,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:12,101 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:34:12,101 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 [2022-12-13 13:34:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:12,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:34:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:12,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:12,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [339476483] [2022-12-13 13:34:12,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [339476483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:34:12,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:34:12,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-12-13 13:34:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952432049] [2022-12-13 13:34:12,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:34:12,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 13:34:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:12,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 13:34:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 13:34:14,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 863 [2022-12-13 13:34:14,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:14,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:14,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 863 [2022-12-13 13:34:14,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:15,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:34:17,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:34:23,641 INFO L130 PetriNetUnfolder]: 51554/70613 cut-off events. [2022-12-13 13:34:23,641 INFO L131 PetriNetUnfolder]: For 207/207 co-relation queries the response was YES. [2022-12-13 13:34:23,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141641 conditions, 70613 events. 51554/70613 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 3446. Compared 446918 event pairs, 43809 based on Foata normal form. 0/23914 useless extension candidates. Maximal degree in co-relation 141633. Up to 23467 conditions per place. [2022-12-13 13:34:23,879 INFO L137 encePairwiseOnDemand]: 851/863 looper letters, 191 selfloop transitions, 27 changer transitions 0/219 dead transitions. [2022-12-13 13:34:23,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 219 transitions, 952 flow [2022-12-13 13:34:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 13:34:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 13:34:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2255 transitions. [2022-12-13 13:34:23,884 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4354963306295867 [2022-12-13 13:34:23,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2255 transitions. [2022-12-13 13:34:23,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2255 transitions. [2022-12-13 13:34:23,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:23,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2255 transitions. [2022-12-13 13:34:23,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 375.8333333333333) internal successors, (2255), 6 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 863.0) internal successors, (6041), 7 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,896 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 863.0) internal successors, (6041), 7 states have internal predecessors, (6041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,896 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 188 flow. Second operand 6 states and 2255 transitions. [2022-12-13 13:34:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 219 transitions, 952 flow [2022-12-13 13:34:23,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 219 transitions, 951 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:23,899 INFO L231 Difference]: Finished difference. Result has 79 places, 97 transitions, 391 flow [2022-12-13 13:34:23,899 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=79, PETRI_TRANSITIONS=97} [2022-12-13 13:34:23,899 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -2 predicate places. [2022-12-13 13:34:23,900 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 97 transitions, 391 flow [2022-12-13 13:34:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:23,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:23,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:34:23,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-13 13:34:24,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:24,103 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:34:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 48549856, now seen corresponding path program 1 times [2022-12-13 13:34:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:24,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837044959] [2022-12-13 13:34:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:24,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:24,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:24,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:24,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-13 13:34:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 13:34:24,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:24,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,344 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-13 13:34:24,345 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 [2022-12-13 13:34:24,375 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-13 13:34:24,375 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 90 treesize of output 89 [2022-12-13 13:34:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:34:24,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:24,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:34:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:24,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:24,494 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:24,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837044959] [2022-12-13 13:34:24,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837044959] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:24,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:24,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:34:24,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240263931] [2022-12-13 13:34:24,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:34:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:34:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:34:24,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 863 [2022-12-13 13:34:24,906 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 97 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:24,906 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:34:24,906 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 863 [2022-12-13 13:34:24,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:34:30,251 INFO L130 PetriNetUnfolder]: 39519/54753 cut-off events. [2022-12-13 13:34:30,251 INFO L131 PetriNetUnfolder]: For 215/215 co-relation queries the response was YES. [2022-12-13 13:34:30,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109995 conditions, 54753 events. 39519/54753 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 2888. Compared 346996 event pairs, 33456 based on Foata normal form. 0/19928 useless extension candidates. Maximal degree in co-relation 109982. Up to 54543 conditions per place. [2022-12-13 13:34:30,443 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 91 selfloop transitions, 1 changer transitions 0/93 dead transitions. [2022-12-13 13:34:30,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 93 transitions, 555 flow [2022-12-13 13:34:30,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:34:30,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:34:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1150 transitions. [2022-12-13 13:34:30,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44418694476631904 [2022-12-13 13:34:30,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1150 transitions. [2022-12-13 13:34:30,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1150 transitions. [2022-12-13 13:34:30,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:34:30,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1150 transitions. [2022-12-13 13:34:30,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.3333333333333) internal successors, (1150), 3 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,453 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,453 INFO L175 Difference]: Start difference. First operand has 79 places, 97 transitions, 391 flow. Second operand 3 states and 1150 transitions. [2022-12-13 13:34:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 93 transitions, 555 flow [2022-12-13 13:34:30,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 93 transitions, 525 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-12-13 13:34:30,455 INFO L231 Difference]: Finished difference. Result has 78 places, 93 transitions, 343 flow [2022-12-13 13:34:30,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=78, PETRI_TRANSITIONS=93} [2022-12-13 13:34:30,456 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -3 predicate places. [2022-12-13 13:34:30,456 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 93 transitions, 343 flow [2022-12-13 13:34:30,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.0) internal successors, (1444), 4 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:34:30,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:34:30,457 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 13:34:30,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-13 13:34:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:30,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:34:30,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:34:30,660 INFO L85 PathProgramCache]: Analyzing trace with hash 48549858, now seen corresponding path program 1 times [2022-12-13 13:34:30,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:34:30,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030229434] [2022-12-13 13:34:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:34:30,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:34:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:34:30,664 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:34:30,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-13 13:34:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:34:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 13:34:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:34:30,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:30,882 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-12-13 13:34:30,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-12-13 13:34:31,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:34:31,087 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 13:34:31,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-12-13 13:34:31,335 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-12-13 13:34:31,335 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 3 case distinctions, treesize of input 55 treesize of output 80 [2022-12-13 13:34:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:34:33,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:34:33,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:34:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030229434] [2022-12-13 13:34:33,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030229434] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:34:33,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:34:33,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:34:33,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265533353] [2022-12-13 13:34:33,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:34:33,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:34:33,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:34:33,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:34:33,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-12-13 13:34:35,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:38,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:40,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:42,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:45,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:47,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:49,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:51,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:54,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:56,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:34:58,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:01,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:03,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 13:35:03,446 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 863 [2022-12-13 13:35:03,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 93 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:03,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:03,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 863 [2022-12-13 13:35:03,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:07,683 INFO L130 PetriNetUnfolder]: 29512/41551 cut-off events. [2022-12-13 13:35:07,683 INFO L131 PetriNetUnfolder]: For 240/240 co-relation queries the response was YES. [2022-12-13 13:35:07,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83817 conditions, 41551 events. 29512/41551 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 2040. Compared 261923 event pairs, 24927 based on Foata normal form. 0/16799 useless extension candidates. Maximal degree in co-relation 83803. Up to 41551 conditions per place. [2022-12-13 13:35:07,816 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 88 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2022-12-13 13:35:07,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 501 flow [2022-12-13 13:35:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:35:07,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:35:07,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 984 transitions. [2022-12-13 13:35:07,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.38006952491309387 [2022-12-13 13:35:07,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 984 transitions. [2022-12-13 13:35:07,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 984 transitions. [2022-12-13 13:35:07,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:07,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 984 transitions. [2022-12-13 13:35:07,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 328.0) internal successors, (984), 3 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:07,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:07,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:07,825 INFO L175 Difference]: Start difference. First operand has 78 places, 93 transitions, 343 flow. Second operand 3 states and 984 transitions. [2022-12-13 13:35:07,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 501 flow [2022-12-13 13:35:07,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 500 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:35:07,827 INFO L231 Difference]: Finished difference. Result has 77 places, 89 transitions, 324 flow [2022-12-13 13:35:07,827 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=77, PETRI_TRANSITIONS=89} [2022-12-13 13:35:07,827 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -4 predicate places. [2022-12-13 13:35:07,827 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 89 transitions, 324 flow [2022-12-13 13:35:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 305.8) internal successors, (1529), 5 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:07,828 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:07,828 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:35:07,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-13 13:35:08,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:08,029 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:35:08,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:08,030 INFO L85 PathProgramCache]: Analyzing trace with hash -588192616, now seen corresponding path program 1 times [2022-12-13 13:35:08,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:08,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1453096867] [2022-12-13 13:35:08,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:08,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:08,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:08,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:08,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-13 13:35:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:35:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:08,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:08,255 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-12-13 13:35:08,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-12-13 13:35:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:08,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:35:08,353 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:35:08,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:35:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:08,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:08,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1453096867] [2022-12-13 13:35:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1453096867] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:08,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:08,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:35:08,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856764471] [2022-12-13 13:35:08,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:08,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:35:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:35:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:35:08,756 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 863 [2022-12-13 13:35:08,757 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 89 transitions, 324 flow. Second operand has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:08,757 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:08,758 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 863 [2022-12-13 13:35:08,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:12,317 INFO L130 PetriNetUnfolder]: 26872/37966 cut-off events. [2022-12-13 13:35:12,317 INFO L131 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2022-12-13 13:35:12,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76396 conditions, 37966 events. 26872/37966 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 1926. Compared 239654 event pairs, 22578 based on Foata normal form. 0/15845 useless extension candidates. Maximal degree in co-relation 76381. Up to 37756 conditions per place. [2022-12-13 13:35:12,466 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 85 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2022-12-13 13:35:12,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 87 transitions, 492 flow [2022-12-13 13:35:12,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:35:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:35:12,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1146 transitions. [2022-12-13 13:35:12,469 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4426419466975666 [2022-12-13 13:35:12,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1146 transitions. [2022-12-13 13:35:12,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1146 transitions. [2022-12-13 13:35:12,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:12,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1146 transitions. [2022-12-13 13:35:12,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:12,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:12,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:12,475 INFO L175 Difference]: Start difference. First operand has 77 places, 89 transitions, 324 flow. Second operand 3 states and 1146 transitions. [2022-12-13 13:35:12,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 87 transitions, 492 flow [2022-12-13 13:35:12,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:35:12,477 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 321 flow [2022-12-13 13:35:12,477 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=321, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2022-12-13 13:35:12,477 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -5 predicate places. [2022-12-13 13:35:12,478 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 321 flow [2022-12-13 13:35:12,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:12,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:12,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 13:35:12,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-12-13 13:35:12,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:12,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:35:12,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash -588192617, now seen corresponding path program 1 times [2022-12-13 13:35:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:12,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [674527593] [2022-12-13 13:35:12,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:35:12,682 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:12,685 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:12,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-13 13:35:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:35:12,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 13:35:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,904 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-13 13:35:12,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-13 13:35:12,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-12-13 13:35:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:35:12,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:35:12,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:35:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:13,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:35:13,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [674527593] [2022-12-13 13:35:13,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [674527593] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:35:13,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:35:13,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:35:13,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182184209] [2022-12-13 13:35:13,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:35:13,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:35:13,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:13,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:35:13,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:35:13,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 360 out of 863 [2022-12-13 13:35:13,515 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 321 flow. Second operand has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:13,515 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:13,515 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 360 of 863 [2022-12-13 13:35:13,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:17,064 INFO L130 PetriNetUnfolder]: 26260/37039 cut-off events. [2022-12-13 13:35:17,064 INFO L131 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2022-12-13 13:35:17,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74543 conditions, 37039 events. 26260/37039 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 1904. Compared 232608 event pairs, 22053 based on Foata normal form. 0/15647 useless extension candidates. Maximal degree in co-relation 74527. Up to 36829 conditions per place. [2022-12-13 13:35:17,194 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 83 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2022-12-13 13:35:17,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 485 flow [2022-12-13 13:35:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:35:17,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:35:17,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1144 transitions. [2022-12-13 13:35:17,198 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4418694476631904 [2022-12-13 13:35:17,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1144 transitions. [2022-12-13 13:35:17,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1144 transitions. [2022-12-13 13:35:17,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:35:17,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1144 transitions. [2022-12-13 13:35:17,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.3333333333333) internal successors, (1144), 3 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:17,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:17,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:17,207 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 321 flow. Second operand 3 states and 1144 transitions. [2022-12-13 13:35:17,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 485 flow [2022-12-13 13:35:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 85 transitions, 484 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:35:17,210 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 318 flow [2022-12-13 13:35:17,210 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2022-12-13 13:35:17,211 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, -6 predicate places. [2022-12-13 13:35:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 318 flow [2022-12-13 13:35:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 361.5) internal successors, (1446), 4 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:17,212 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:35:17,212 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-12-13 13:35:17,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-13 13:35:17,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:17,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:35:17,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:35:17,414 INFO L85 PathProgramCache]: Analyzing trace with hash -717498687, now seen corresponding path program 2 times [2022-12-13 13:35:17,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:35:17,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5630207] [2022-12-13 13:35:17,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 13:35:17,415 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:35:17,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:35:17,416 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:35:17,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-13 13:35:17,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 13:35:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 13:35:17,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 13:35:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:35:17,721 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:35:17,721 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 [2022-12-13 13:35:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:17,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:35:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:35:18,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:35:18,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5630207] [2022-12-13 13:35:18,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5630207] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:35:18,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:35:18,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-12-13 13:35:18,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373910225] [2022-12-13 13:35:18,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:35:18,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 13:35:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:35:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 13:35:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 13:35:27,701 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 863 [2022-12-13 13:35:27,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 342.0) internal successors, (4104), 12 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:35:27,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:35:27,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 863 [2022-12-13 13:35:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:35:31,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:33,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:35,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:37,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:39,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:40,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:42,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:44,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:47,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:48,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:51,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:35:53,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-13 13:36:08,527 INFO L130 PetriNetUnfolder]: 78760/111075 cut-off events. [2022-12-13 13:36:08,527 INFO L131 PetriNetUnfolder]: For 669/669 co-relation queries the response was YES. [2022-12-13 13:36:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223434 conditions, 111075 events. 78760/111075 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 3610. Compared 760177 event pairs, 66159 based on Foata normal form. 10/47129 useless extension candidates. Maximal degree in co-relation 223417. Up to 12285 conditions per place. [2022-12-13 13:36:09,004 INFO L137 encePairwiseOnDemand]: 853/863 looper letters, 484 selfloop transitions, 44 changer transitions 0/529 dead transitions. [2022-12-13 13:36:09,005 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 529 transitions, 2430 flow [2022-12-13 13:36:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 13:36:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-12-13 13:36:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 5653 transitions. [2022-12-13 13:36:09,014 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43669370413286984 [2022-12-13 13:36:09,014 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 5653 transitions. [2022-12-13 13:36:09,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 5653 transitions. [2022-12-13 13:36:09,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:36:09,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 5653 transitions. [2022-12-13 13:36:09,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 376.8666666666667) internal successors, (5653), 15 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 863.0) internal successors, (13808), 16 states have internal predecessors, (13808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,036 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 863.0) internal successors, (13808), 16 states have internal predecessors, (13808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,036 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 318 flow. Second operand 15 states and 5653 transitions. [2022-12-13 13:36:09,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 529 transitions, 2430 flow [2022-12-13 13:36:09,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 529 transitions, 2429 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:36:09,041 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 609 flow [2022-12-13 13:36:09,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=609, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2022-12-13 13:36:09,041 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-12-13 13:36:09,041 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 609 flow [2022-12-13 13:36:09,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 342.0) internal successors, (4104), 12 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:36:09,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:09,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-13 13:36:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:09,244 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:36:09,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:09,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1054105119, now seen corresponding path program 1 times [2022-12-13 13:36:09,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:09,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890986070] [2022-12-13 13:36:09,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:09,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:09,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:09,249 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:09,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-13 13:36:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:36:09,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:09,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:09,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:09,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890986070] [2022-12-13 13:36:09,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890986070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:09,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:09,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:36:09,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055484638] [2022-12-13 13:36:09,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:09,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:36:09,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:09,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:36:09,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:36:09,633 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 863 [2022-12-13 13:36:09,635 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 609 flow. Second operand has 5 states, 5 states have (on average 352.4) internal successors, (1762), 5 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:09,635 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:36:09,635 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 863 [2022-12-13 13:36:09,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:36:23,889 INFO L130 PetriNetUnfolder]: 95939/136608 cut-off events. [2022-12-13 13:36:23,890 INFO L131 PetriNetUnfolder]: For 736/736 co-relation queries the response was YES. [2022-12-13 13:36:24,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275049 conditions, 136608 events. 95939/136608 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 4461. Compared 989065 event pairs, 68697 based on Foata normal form. 0/61470 useless extension candidates. Maximal degree in co-relation 275025. Up to 110444 conditions per place. [2022-12-13 13:36:24,603 INFO L137 encePairwiseOnDemand]: 854/863 looper letters, 203 selfloop transitions, 4 changer transitions 0/208 dead transitions. [2022-12-13 13:36:24,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 208 transitions, 1437 flow [2022-12-13 13:36:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:36:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:36:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1897 transitions. [2022-12-13 13:36:24,607 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4396292004634994 [2022-12-13 13:36:24,607 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1897 transitions. [2022-12-13 13:36:24,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1897 transitions. [2022-12-13 13:36:24,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:36:24,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1897 transitions. [2022-12-13 13:36:24,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 379.4) internal successors, (1897), 5 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:24,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 863.0) internal successors, (5178), 6 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:24,615 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 863.0) internal successors, (5178), 6 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:24,615 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 609 flow. Second operand 5 states and 1897 transitions. [2022-12-13 13:36:24,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 208 transitions, 1437 flow [2022-12-13 13:36:24,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 208 transitions, 1304 flow, removed 27 selfloop flow, removed 4 redundant places. [2022-12-13 13:36:24,620 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 546 flow [2022-12-13 13:36:24,620 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2022-12-13 13:36:24,620 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 15 predicate places. [2022-12-13 13:36:24,620 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 546 flow [2022-12-13 13:36:24,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 352.4) internal successors, (1762), 5 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:24,621 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:36:24,621 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:24,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-13 13:36:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:24,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:36:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:24,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1682612176, now seen corresponding path program 1 times [2022-12-13 13:36:24,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:24,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089990532] [2022-12-13 13:36:24,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:24,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:24,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:24,828 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:24,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-13 13:36:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:24,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 13:36:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:24,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:25,053 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-13 13:36:25,053 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 [2022-12-13 13:36:25,067 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 [2022-12-13 13:36:25,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:25,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:36:25,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:25,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-13 13:36:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:25,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:25,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089990532] [2022-12-13 13:36:25,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089990532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:25,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:25,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:36:25,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900014997] [2022-12-13 13:36:25,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:25,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:36:25,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:25,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:36:25,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:36:25,871 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 358 out of 863 [2022-12-13 13:36:25,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 359.6) internal successors, (1798), 5 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:25,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:36:25,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 358 of 863 [2022-12-13 13:36:25,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:36:39,373 INFO L130 PetriNetUnfolder]: 91682/130065 cut-off events. [2022-12-13 13:36:39,373 INFO L131 PetriNetUnfolder]: For 11372/11372 co-relation queries the response was YES. [2022-12-13 13:36:39,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278119 conditions, 130065 events. 91682/130065 cut-off events. For 11372/11372 co-relation queries the response was YES. Maximal size of possible extension queue 4091. Compared 920902 event pairs, 77436 based on Foata normal form. 0/61350 useless extension candidates. Maximal degree in co-relation 278092. Up to 129561 conditions per place. [2022-12-13 13:36:40,134 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 106 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2022-12-13 13:36:40,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 108 transitions, 756 flow [2022-12-13 13:36:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:36:40,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:36:40,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2022-12-13 13:36:40,139 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4387794515256856 [2022-12-13 13:36:40,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2022-12-13 13:36:40,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2022-12-13 13:36:40,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:36:40,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2022-12-13 13:36:40,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:40,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:40,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:40,146 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 546 flow. Second operand 3 states and 1136 transitions. [2022-12-13 13:36:40,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 108 transitions, 756 flow [2022-12-13 13:36:40,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 108 transitions, 750 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 13:36:40,218 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 538 flow [2022-12-13 13:36:40,218 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=538, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2022-12-13 13:36:40,218 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 14 predicate places. [2022-12-13 13:36:40,218 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 538 flow [2022-12-13 13:36:40,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 359.6) internal successors, (1798), 5 states have internal predecessors, (1798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:40,219 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:36:40,219 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:40,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-13 13:36:40,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:40,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:36:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1682612177, now seen corresponding path program 1 times [2022-12-13 13:36:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:40,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1921267044] [2022-12-13 13:36:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:40,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:40,426 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:40,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-13 13:36:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:40,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 13:36:40,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:40,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:40,654 INFO L321 Elim1Store]: treesize reduction 89, result has 14.4 percent of original size [2022-12-13 13:36:40,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 13:36:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:40,744 INFO L321 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-12-13 13:36:40,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 52 [2022-12-13 13:36:41,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:36:41,102 INFO L321 Elim1Store]: treesize reduction 62, result has 19.5 percent of original size [2022-12-13 13:36:41,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 44 [2022-12-13 13:36:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:36:41,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:41,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:41,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1921267044] [2022-12-13 13:36:41,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1921267044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:41,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:41,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 13:36:41,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385117291] [2022-12-13 13:36:41,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:41,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:36:41,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:36:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:36:42,905 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 355 out of 863 [2022-12-13 13:36:42,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 538 flow. Second operand has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:42,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:36:42,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 355 of 863 [2022-12-13 13:36:42,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:36:56,821 INFO L130 PetriNetUnfolder]: 87425/123567 cut-off events. [2022-12-13 13:36:56,821 INFO L131 PetriNetUnfolder]: For 10789/10789 co-relation queries the response was YES. [2022-12-13 13:36:57,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264311 conditions, 123567 events. 87425/123567 cut-off events. For 10789/10789 co-relation queries the response was YES. Maximal size of possible extension queue 3873. Compared 862208 event pairs, 73737 based on Foata normal form. 0/59514 useless extension candidates. Maximal degree in co-relation 264283. Up to 123189 conditions per place. [2022-12-13 13:36:57,705 INFO L137 encePairwiseOnDemand]: 860/863 looper letters, 104 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2022-12-13 13:36:57,705 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 744 flow [2022-12-13 13:36:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 13:36:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 13:36:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1125 transitions. [2022-12-13 13:36:57,708 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43453070683661643 [2022-12-13 13:36:57,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1125 transitions. [2022-12-13 13:36:57,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1125 transitions. [2022-12-13 13:36:57,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:36:57,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1125 transitions. [2022-12-13 13:36:57,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 375.0) internal successors, (1125), 3 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:57,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:57,712 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 863.0) internal successors, (3452), 4 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:57,712 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 538 flow. Second operand 3 states and 1125 transitions. [2022-12-13 13:36:57,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 744 flow [2022-12-13 13:36:57,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 743 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:36:57,780 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 535 flow [2022-12-13 13:36:57,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=535, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2022-12-13 13:36:57,781 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 13 predicate places. [2022-12-13 13:36:57,781 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 535 flow [2022-12-13 13:36:57,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 357.0) internal successors, (1428), 4 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:57,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:36:57,781 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:36:57,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-13 13:36:57,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:57,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:36:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:36:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1687322049, now seen corresponding path program 1 times [2022-12-13 13:36:57,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:36:57,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1466753848] [2022-12-13 13:36:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:36:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:36:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:36:57,984 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:36:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-13 13:36:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:36:58,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 13:36:58,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:36:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:36:58,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:36:58,150 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:36:58,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1466753848] [2022-12-13 13:36:58,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1466753848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:36:58,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:36:58,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:36:58,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936192205] [2022-12-13 13:36:58,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:36:58,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:36:58,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:36:58,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:36:58,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:36:58,460 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 863 [2022-12-13 13:36:58,462 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 352.6) internal successors, (1763), 5 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:36:58,462 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:36:58,462 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 863 [2022-12-13 13:36:58,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:37:18,240 INFO L130 PetriNetUnfolder]: 119069/170211 cut-off events. [2022-12-13 13:37:18,240 INFO L131 PetriNetUnfolder]: For 18402/18402 co-relation queries the response was YES. [2022-12-13 13:37:18,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364102 conditions, 170211 events. 119069/170211 cut-off events. For 18402/18402 co-relation queries the response was YES. Maximal size of possible extension queue 5306. Compared 1276657 event pairs, 78381 based on Foata normal form. 1890/88761 useless extension candidates. Maximal degree in co-relation 364073. Up to 123177 conditions per place. [2022-12-13 13:37:19,263 INFO L137 encePairwiseOnDemand]: 854/863 looper letters, 169 selfloop transitions, 15 changer transitions 0/185 dead transitions. [2022-12-13 13:37:19,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 185 transitions, 1162 flow [2022-12-13 13:37:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 13:37:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 13:37:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1884 transitions. [2022-12-13 13:37:19,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43661645422943224 [2022-12-13 13:37:19,268 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1884 transitions. [2022-12-13 13:37:19,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1884 transitions. [2022-12-13 13:37:19,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:37:19,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1884 transitions. [2022-12-13 13:37:19,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 376.8) internal successors, (1884), 5 states have internal predecessors, (1884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:19,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 863.0) internal successors, (5178), 6 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:19,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 863.0) internal successors, (5178), 6 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:19,277 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 535 flow. Second operand 5 states and 1884 transitions. [2022-12-13 13:37:19,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 185 transitions, 1162 flow [2022-12-13 13:37:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 185 transitions, 1161 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 13:37:19,426 INFO L231 Difference]: Finished difference. Result has 99 places, 108 transitions, 593 flow [2022-12-13 13:37:19,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=593, PETRI_PLACES=99, PETRI_TRANSITIONS=108} [2022-12-13 13:37:19,427 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 18 predicate places. [2022-12-13 13:37:19,427 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 108 transitions, 593 flow [2022-12-13 13:37:19,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 352.6) internal successors, (1763), 5 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:19,427 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:37:19,428 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:37:19,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-13 13:37:19,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:37:19,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:37:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:37:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash 621361523, now seen corresponding path program 1 times [2022-12-13 13:37:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:37:19,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365236026] [2022-12-13 13:37:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:37:19,633 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:37:19,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:37:19,637 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:37:19,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-13 13:37:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:37:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 13:37:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:37:19,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:37:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:37:19,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:37:19,738 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:37:19,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365236026] [2022-12-13 13:37:19,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365236026] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:37:19,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:37:19,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:37:19,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539867637] [2022-12-13 13:37:19,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:37:19,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:37:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:37:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:37:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:37:20,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 863 [2022-12-13 13:37:20,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 108 transitions, 593 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:20,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:37:20,037 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 863 [2022-12-13 13:37:20,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:37:36,600 INFO L130 PetriNetUnfolder]: 88352/126552 cut-off events. [2022-12-13 13:37:36,600 INFO L131 PetriNetUnfolder]: For 41053/41053 co-relation queries the response was YES. [2022-12-13 13:37:37,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286377 conditions, 126552 events. 88352/126552 cut-off events. For 41053/41053 co-relation queries the response was YES. Maximal size of possible extension queue 3993. Compared 911809 event pairs, 73440 based on Foata normal form. 0/68493 useless extension candidates. Maximal degree in co-relation 286346. Up to 125910 conditions per place. [2022-12-13 13:37:37,339 INFO L137 encePairwiseOnDemand]: 858/863 looper letters, 96 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2022-12-13 13:37:37,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 105 transitions, 795 flow [2022-12-13 13:37:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:37:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:37:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1430 transitions. [2022-12-13 13:37:37,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.414252607184241 [2022-12-13 13:37:37,343 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1430 transitions. [2022-12-13 13:37:37,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1430 transitions. [2022-12-13 13:37:37,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:37:37,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1430 transitions. [2022-12-13 13:37:37,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 357.5) internal successors, (1430), 4 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:37,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 863.0) internal successors, (4315), 5 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:37,348 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 863.0) internal successors, (4315), 5 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:37,348 INFO L175 Difference]: Start difference. First operand has 99 places, 108 transitions, 593 flow. Second operand 4 states and 1430 transitions. [2022-12-13 13:37:37,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 105 transitions, 795 flow [2022-12-13 13:37:37,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 779 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-12-13 13:37:37,456 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 587 flow [2022-12-13 13:37:37,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=587, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2022-12-13 13:37:37,456 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 17 predicate places. [2022-12-13 13:37:37,456 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 587 flow [2022-12-13 13:37:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:37:37,457 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:37:37,457 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:37:37,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-12-13 13:37:37,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:37:37,658 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:37:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:37:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1844073206, now seen corresponding path program 1 times [2022-12-13 13:37:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:37:37,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230457760] [2022-12-13 13:37:37,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:37:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:37:37,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:37:37,663 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:37:37,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-13 13:37:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:37:37,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 13:37:37,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:37:37,935 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-13 13:37:37,936 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 [2022-12-13 13:37:38,039 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-13 13:37:38,039 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 [2022-12-13 13:37:38,165 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-13 13:37:38,165 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 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-13 13:37:38,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:37:38,228 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:37:38,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:37:38,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:37:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:37:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:37:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:37:42,561 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:37:42,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230457760] [2022-12-13 13:37:42,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230457760] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:37:42,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:37:42,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-12-13 13:37:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183762130] [2022-12-13 13:37:42,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:37:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 13:37:42,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:37:42,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 13:37:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=120, Unknown=1, NotChecked=0, Total=156 [2022-12-13 13:37:44,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:47,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:49,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:52,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:54,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:56,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:37:59,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:02,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:04,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:06,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:09,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:11,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:13,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:15,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:18,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:20,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:23,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:25,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:28,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:32,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:35,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:37,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:38:39,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:41,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 13:38:42,194 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 863 [2022-12-13 13:38:42,196 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 587 flow. Second operand has 13 states, 13 states have (on average 286.38461538461536) internal successors, (3723), 13 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:38:42,196 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:38:42,196 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 863 [2022-12-13 13:38:42,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:38:49,739 WARN L233 SmtUtils]: Spent 7.28s on a formula simplification. DAG size of input: 43 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:39:02,237 WARN L233 SmtUtils]: Spent 9.18s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:39:04,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 13:39:20,042 WARN L233 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 59 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:39:26,769 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 13:40:22,017 INFO L130 PetriNetUnfolder]: 244678/346752 cut-off events. [2022-12-13 13:40:22,017 INFO L131 PetriNetUnfolder]: For 77887/77887 co-relation queries the response was YES. [2022-12-13 13:40:23,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783221 conditions, 346752 events. 244678/346752 cut-off events. For 77887/77887 co-relation queries the response was YES. Maximal size of possible extension queue 9943. Compared 2769526 event pairs, 76788 based on Foata normal form. 0/189054 useless extension candidates. Maximal degree in co-relation 783189. Up to 58164 conditions per place. [2022-12-13 13:40:24,069 INFO L137 encePairwiseOnDemand]: 842/863 looper letters, 1017 selfloop transitions, 149 changer transitions 0/1166 dead transitions. [2022-12-13 13:40:24,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 1166 transitions, 6013 flow [2022-12-13 13:40:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:40:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:40:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 11163 transitions. [2022-12-13 13:40:24,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36957457374606856 [2022-12-13 13:40:24,087 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 11163 transitions. [2022-12-13 13:40:24,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 11163 transitions. [2022-12-13 13:40:24,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:40:24,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 11163 transitions. [2022-12-13 13:40:24,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 318.9428571428571) internal successors, (11163), 35 states have internal predecessors, (11163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:24,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 863.0) internal successors, (31068), 36 states have internal predecessors, (31068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:24,125 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 863.0) internal successors, (31068), 36 states have internal predecessors, (31068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:24,125 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 587 flow. Second operand 35 states and 11163 transitions. [2022-12-13 13:40:24,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 1166 transitions, 6013 flow [2022-12-13 13:40:24,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 1166 transitions, 5984 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:40:24,900 INFO L231 Difference]: Finished difference. Result has 149 places, 242 transitions, 2109 flow [2022-12-13 13:40:24,900 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2109, PETRI_PLACES=149, PETRI_TRANSITIONS=242} [2022-12-13 13:40:24,900 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 68 predicate places. [2022-12-13 13:40:24,900 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 242 transitions, 2109 flow [2022-12-13 13:40:24,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 286.38461538461536) internal successors, (3723), 13 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:24,901 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:40:24,901 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:40:24,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-13 13:40:25,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:40:25,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:40:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:40:25,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1844073289, now seen corresponding path program 1 times [2022-12-13 13:40:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:40:25,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432049267] [2022-12-13 13:40:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:40:25,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:40:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:40:25,107 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:40:25,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-13 13:40:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:40:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 13:40:25,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:40:25,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:40:25,310 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 13:40:25,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-13 13:40:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 13:40:25,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:40:25,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:40:25,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432049267] [2022-12-13 13:40:25,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432049267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:40:25,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:40:25,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 13:40:25,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863627723] [2022-12-13 13:40:25,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:40:25,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 13:40:25,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:40:25,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 13:40:25,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 13:40:25,649 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 863 [2022-12-13 13:40:25,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 242 transitions, 2109 flow. Second operand has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:40:25,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:40:25,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 863 [2022-12-13 13:40:25,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:41:00,131 INFO L130 PetriNetUnfolder]: 167971/239532 cut-off events. [2022-12-13 13:41:00,131 INFO L131 PetriNetUnfolder]: For 1529372/1529372 co-relation queries the response was YES. [2022-12-13 13:41:01,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 738558 conditions, 239532 events. 167971/239532 cut-off events. For 1529372/1529372 co-relation queries the response was YES. Maximal size of possible extension queue 6743. Compared 1848064 event pairs, 135729 based on Foata normal form. 0/158696 useless extension candidates. Maximal degree in co-relation 738506. Up to 239029 conditions per place. [2022-12-13 13:41:02,630 INFO L137 encePairwiseOnDemand]: 858/863 looper letters, 199 selfloop transitions, 20 changer transitions 0/220 dead transitions. [2022-12-13 13:41:02,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 220 transitions, 2367 flow [2022-12-13 13:41:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 13:41:02,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 13:41:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1426 transitions. [2022-12-13 13:41:02,633 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4130938586326767 [2022-12-13 13:41:02,633 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1426 transitions. [2022-12-13 13:41:02,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1426 transitions. [2022-12-13 13:41:02,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:41:02,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1426 transitions. [2022-12-13 13:41:02,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 356.5) internal successors, (1426), 4 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:02,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 863.0) internal successors, (4315), 5 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:02,638 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 863.0) internal successors, (4315), 5 states have internal predecessors, (4315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:02,638 INFO L175 Difference]: Start difference. First operand has 149 places, 242 transitions, 2109 flow. Second operand 4 states and 1426 transitions. [2022-12-13 13:41:02,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 220 transitions, 2367 flow [2022-12-13 13:41:15,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 220 transitions, 2159 flow, removed 50 selfloop flow, removed 4 redundant places. [2022-12-13 13:41:15,187 INFO L231 Difference]: Finished difference. Result has 145 places, 220 transitions, 1761 flow [2022-12-13 13:41:15,187 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1761, PETRI_PLACES=145, PETRI_TRANSITIONS=220} [2022-12-13 13:41:15,188 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 64 predicate places. [2022-12-13 13:41:15,188 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 220 transitions, 1761 flow [2022-12-13 13:41:15,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:15,188 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:41:15,188 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:41:15,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-12-13 13:41:15,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:41:15,390 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:41:15,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:41:15,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1844073288, now seen corresponding path program 1 times [2022-12-13 13:41:15,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:41:15,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232530959] [2022-12-13 13:41:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:41:15,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:41:15,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:41:15,395 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:41:15,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-13 13:41:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:41:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 13:41:15,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:41:15,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 13:41:15,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-13 13:41:15,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 13:41:15,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 13:41:15,692 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-13 13:41:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-13 13:41:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:41:15,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 13:41:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 13:41:20,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:41:20,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232530959] [2022-12-13 13:41:20,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232530959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 13:41:20,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 13:41:20,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 13:41:20,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062704264] [2022-12-13 13:41:20,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 13:41:20,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 13:41:20,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:41:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 13:41:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-13 13:41:28,212 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 863 [2022-12-13 13:41:28,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 220 transitions, 1761 flow. Second operand has 10 states, 10 states have (on average 325.6) internal successors, (3256), 10 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:41:28,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:41:28,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 863 [2022-12-13 13:41:28,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 13:43:14,934 INFO L130 PetriNetUnfolder]: 465430/660156 cut-off events. [2022-12-13 13:43:14,934 INFO L131 PetriNetUnfolder]: For 4946112/4946112 co-relation queries the response was YES. [2022-12-13 13:43:19,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131639 conditions, 660156 events. 465430/660156 cut-off events. For 4946112/4946112 co-relation queries the response was YES. Maximal size of possible extension queue 17276. Compared 5544460 event pairs, 190872 based on Foata normal form. 0/454840 useless extension candidates. Maximal degree in co-relation 2131588. Up to 97380 conditions per place. [2022-12-13 13:43:21,327 INFO L137 encePairwiseOnDemand]: 847/863 looper letters, 1137 selfloop transitions, 232 changer transitions 0/1370 dead transitions. [2022-12-13 13:43:21,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 1370 transitions, 12115 flow [2022-12-13 13:43:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 13:43:21,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-12-13 13:43:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 12412 transitions. [2022-12-13 13:43:21,341 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41092534348617776 [2022-12-13 13:43:21,341 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 12412 transitions. [2022-12-13 13:43:21,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 12412 transitions. [2022-12-13 13:43:21,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 13:43:21,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 12412 transitions. [2022-12-13 13:43:21,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 354.62857142857143) internal successors, (12412), 35 states have internal predecessors, (12412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 863.0) internal successors, (31068), 36 states have internal predecessors, (31068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,416 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 863.0) internal successors, (31068), 36 states have internal predecessors, (31068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:21,416 INFO L175 Difference]: Start difference. First operand has 145 places, 220 transitions, 1761 flow. Second operand 35 states and 12412 transitions. [2022-12-13 13:43:21,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 1370 transitions, 12115 flow [2022-12-13 13:43:56,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 1370 transitions, 12094 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 13:43:56,554 INFO L231 Difference]: Finished difference. Result has 184 places, 387 transitions, 3998 flow [2022-12-13 13:43:56,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=863, PETRI_DIFFERENCE_MINUEND_FLOW=1738, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3998, PETRI_PLACES=184, PETRI_TRANSITIONS=387} [2022-12-13 13:43:56,554 INFO L288 CegarLoopForPetriNet]: 81 programPoint places, 103 predicate places. [2022-12-13 13:43:56,555 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 387 transitions, 3998 flow [2022-12-13 13:43:56,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 325.6) internal successors, (3256), 10 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:56,555 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 13:43:56,555 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 13:43:56,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-13 13:43:56,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:43:56,757 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-12-13 13:43:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 13:43:56,758 INFO L85 PathProgramCache]: Analyzing trace with hash 621361524, now seen corresponding path program 1 times [2022-12-13 13:43:56,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-12-13 13:43:56,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332490515] [2022-12-13 13:43:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 13:43:56,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-13 13:43:56,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat [2022-12-13 13:43:56,762 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-13 13:43:56,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_359ee086-92dc-41ee-931a-8234dd69f002/bin/uautomizer-uyxdKDjOR8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-13 13:43:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 13:43:57,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 13:43:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 13:43:57,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 13:43:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 13:43:57,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 13:43:57,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-12-13 13:43:57,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332490515] [2022-12-13 13:43:57,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332490515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 13:43:57,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 13:43:57,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 13:43:57,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715388446] [2022-12-13 13:43:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 13:43:57,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 13:43:57,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-12-13 13:43:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 13:43:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 13:43:57,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 350 out of 863 [2022-12-13 13:43:57,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 387 transitions, 3998 flow. Second operand has 5 states, 5 states have (on average 351.8) internal successors, (1759), 5 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 13:43:57,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 13:43:57,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 350 of 863 [2022-12-13 13:43:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand