./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:23:33,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:23:33,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:23:33,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:23:33,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:23:33,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:23:33,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:23:33,775 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:23:33,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:23:33,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:23:33,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:23:33,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:23:33,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:23:33,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:23:33,782 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:23:33,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:23:33,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:23:33,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:23:33,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:23:33,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:23:33,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:23:33,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:23:33,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:23:33,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:23:33,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:23:33,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:23:33,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:23:33,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:23:33,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:23:33,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:23:33,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:23:33,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:23:33,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:23:33,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:23:33,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:23:33,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:23:33,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:23:33,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:23:33,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:23:33,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:23:33,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:23:33,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:23:33,849 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:23:33,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:23:33,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:23:33,850 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:23:33,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:23:33,851 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:23:33,851 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:23:33,851 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:23:33,852 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:23:33,852 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:23:33,852 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:23:33,852 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:23:33,853 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:23:33,853 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:23:33,853 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:23:33,854 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:23:33,854 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:23:33,854 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:23:33,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:23:33,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:23:33,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:23:33,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:23:33,856 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:23:33,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:23:33,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:23:33,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:23:33,857 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:23:33,857 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:23:33,857 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:23:33,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:23:33,858 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:23:33,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:23:33,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:23:33,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:23:33,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:23:33,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:23:33,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:23:33,860 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:23:33,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:23:33,860 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:23:33,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:23:33,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:23:33,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-26 00:23:34,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:23:34,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:23:34,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:23:34,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:23:34,147 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:23:34,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-26 00:23:37,324 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:23:37,597 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:23:37,598 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-26 00:23:37,605 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/11df2de85/8627a7d3c7b74faca34ddb05322f02fd/FLAG1b02a3c0c [2022-11-26 00:23:37,619 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/11df2de85/8627a7d3c7b74faca34ddb05322f02fd [2022-11-26 00:23:37,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:23:37,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:23:37,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:23:37,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:23:37,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:23:37,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:23:37" (1/1) ... [2022-11-26 00:23:37,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbdadaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:37, skipping insertion in model container [2022-11-26 00:23:37,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:23:37" (1/1) ... [2022-11-26 00:23:37,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:23:37,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:23:37,840 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-26 00:23:37,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:23:37,862 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 00:23:37,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3950d679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:37, skipping insertion in model container [2022-11-26 00:23:37,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:23:37,863 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 00:23:37,865 INFO L158 Benchmark]: Toolchain (without parser) took 240.48ms. Allocated memory is still 161.5MB. Free memory was 127.7MB in the beginning and 118.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:23:37,865 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory was 67.1MB in the beginning and 67.0MB in the end (delta: 22.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:23:37,866 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.90ms. Allocated memory is still 161.5MB. Free memory was 127.7MB in the beginning and 118.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:23:37,868 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 125.8MB. Free memory was 67.1MB in the beginning and 67.0MB in the end (delta: 22.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.90ms. Allocated memory is still 161.5MB. Free memory was 127.7MB in the beginning and 118.1MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:23:40,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:23:40,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:23:40,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:23:40,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:23:40,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:23:40,186 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:23:40,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:23:40,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:23:40,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:23:40,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:23:40,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:23:40,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:23:40,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:23:40,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:23:40,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:23:40,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:23:40,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:23:40,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:23:40,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:23:40,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:23:40,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:23:40,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:23:40,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:23:40,213 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:23:40,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:23:40,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:23:40,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:23:40,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:23:40,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:23:40,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:23:40,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:23:40,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:23:40,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:23:40,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:23:40,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:23:40,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:23:40,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:23:40,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:23:40,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:23:40,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:23:40,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 00:23:40,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:23:40,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:23:40,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:23:40,271 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:23:40,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:23:40,272 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:23:40,273 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:23:40,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:23:40,273 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:23:40,273 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:23:40,274 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:23:40,274 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:23:40,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:23:40,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:23:40,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:23:40,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:23:40,276 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:23:40,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:23:40,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:23:40,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:23:40,277 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:23:40,277 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:23:40,277 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:23:40,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:23:40,278 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:23:40,278 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:23:40,278 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:23:40,279 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:23:40,279 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:23:40,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:23:40,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:23:40,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:23:40,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:23:40,280 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:23:40,280 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:23:40,281 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:23:40,281 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:23:40,281 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:23:40,281 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:23:40,282 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-26 00:23:40,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:23:40,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:23:40,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:23:40,669 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:23:40,670 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:23:40,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-26 00:23:43,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:23:44,218 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:23:44,218 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-26 00:23:44,226 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/d93865292/7adf6f6116b74d26923937ff8c63a3bc/FLAG80a5ada1f [2022-11-26 00:23:44,242 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/data/d93865292/7adf6f6116b74d26923937ff8c63a3bc [2022-11-26 00:23:44,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:23:44,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:23:44,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:23:44,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:23:44,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:23:44,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@622b4b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44, skipping insertion in model container [2022-11-26 00:23:44,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:23:44,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:23:44,457 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-26 00:23:44,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:23:44,480 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 00:23:44,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:23:44,496 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-26 00:23:44,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:23:44,505 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:23:44,526 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_9b81c8fe-36d7-466a-9c8a-f92e257aced6/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-26 00:23:44,530 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:23:44,547 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:23:44,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44 WrapperNode [2022-11-26 00:23:44,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:23:44,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:23:44,549 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:23:44,549 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:23:44,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,590 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 108 [2022-11-26 00:23:44,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:23:44,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:23:44,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:23:44,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:23:44,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:23:44,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:23:44,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:23:44,628 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:23:44,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (1/1) ... [2022-11-26 00:23:44,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:23:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:44,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:23:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:23:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:23:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 00:23:44,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 00:23:44,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 00:23:44,726 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 00:23:44,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:23:44,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:23:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:23:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:23:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:23:44,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:23:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:23:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:23:44,730 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:23:44,887 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:23:44,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:23:45,601 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:23:45,611 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:23:45,611 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 00:23:45,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:23:45 BoogieIcfgContainer [2022-11-26 00:23:45,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:23:45,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:23:45,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:23:45,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:23:45,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:23:44" (1/3) ... [2022-11-26 00:23:45,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251eecca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:23:45, skipping insertion in model container [2022-11-26 00:23:45,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:23:44" (2/3) ... [2022-11-26 00:23:45,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@251eecca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:23:45, skipping insertion in model container [2022-11-26 00:23:45,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:23:45" (3/3) ... [2022-11-26 00:23:45,624 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-11-26 00:23:45,659 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:23:45,659 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-26 00:23:45,659 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:23:45,824 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-26 00:23:45,887 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:23:45,914 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 194 transitions, 404 flow [2022-11-26 00:23:45,923 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 194 transitions, 404 flow [2022-11-26 00:23:45,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 404 flow [2022-11-26 00:23:46,023 INFO L130 PetriNetUnfolder]: 15/192 cut-off events. [2022-11-26 00:23:46,023 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-26 00:23:46,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 15/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 224 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-26 00:23:46,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-11-26 00:24:12,213 INFO L134 LiptonReduction]: Checked pairs total: 2579 [2022-11-26 00:24:12,214 INFO L136 LiptonReduction]: Total number of compositions: 214 [2022-11-26 00:24:12,222 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 43 transitions, 102 flow [2022-11-26 00:24:12,257 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:12,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:24:12,289 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=FINITE_AUTOMATA, 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;@5207209, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:24:12,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-26 00:24:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:12,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:24:12,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:12,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:24:12,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 23495, now seen corresponding path program 1 times [2022-11-26 00:24:12,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:12,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [168269333] [2022-11-26 00:24:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:12,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:12,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:12,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:24:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:24:12,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:12,576 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:24:12,577 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:24:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:12,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:12,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:12,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [168269333] [2022-11-26 00:24:12,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [168269333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:12,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:24:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698550730] [2022-11-26 00:24:12,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:12,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:12,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:12,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:12,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:12,639 INFO L87 Difference]: Start difference. First operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:12,901 INFO L93 Difference]: Finished difference Result 230 states and 606 transitions. [2022-11-26 00:24:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:12,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:24:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:12,917 INFO L225 Difference]: With dead ends: 230 [2022-11-26 00:24:12,917 INFO L226 Difference]: Without dead ends: 230 [2022-11-26 00:24:12,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:12,921 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:12,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-26 00:24:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-11-26 00:24:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 131 states have (on average 4.625954198473282) internal successors, (606), 229 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 606 transitions. [2022-11-26 00:24:12,988 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 606 transitions. Word has length 2 [2022-11-26 00:24:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:12,988 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 606 transitions. [2022-11-26 00:24:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 606 transitions. [2022-11-26 00:24:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:24:12,992 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:12,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:24:13,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:13,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:13,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash 23496, now seen corresponding path program 1 times [2022-11-26 00:24:13,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:13,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229764379] [2022-11-26 00:24:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:13,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:13,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:24:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:13,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:24:13,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:13,358 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:13,359 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:13,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:13,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:13,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229764379] [2022-11-26 00:24:13,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229764379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:13,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:13,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:24:13,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678524257] [2022-11-26 00:24:13,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:13,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:13,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:13,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:13,397 INFO L87 Difference]: Start difference. First operand 230 states and 606 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:13,858 INFO L93 Difference]: Finished difference Result 457 states and 1209 transitions. [2022-11-26 00:24:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:13,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:24:13,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:13,863 INFO L225 Difference]: With dead ends: 457 [2022-11-26 00:24:13,863 INFO L226 Difference]: Without dead ends: 457 [2022-11-26 00:24:13,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:13,865 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:13,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:24:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-26 00:24:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 232. [2022-11-26 00:24:13,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 133 states have (on average 4.601503759398496) internal successors, (612), 231 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 612 transitions. [2022-11-26 00:24:13,887 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 612 transitions. Word has length 2 [2022-11-26 00:24:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 612 transitions. [2022-11-26 00:24:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 612 transitions. [2022-11-26 00:24:13,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:24:13,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:13,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:24:13,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:14,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:14,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:14,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 733768, now seen corresponding path program 1 times [2022-11-26 00:24:14,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:14,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140588576] [2022-11-26 00:24:14,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:14,103 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:14,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 00:24:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:14,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:24:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:14,265 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-26 00:24:14,270 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-26 00:24:14,376 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:24:14,376 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 [2022-11-26 00:24:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:14,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:14,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:14,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140588576] [2022-11-26 00:24:14,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140588576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:14,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:14,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:24:14,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200959992] [2022-11-26 00:24:14,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:14,401 INFO L87 Difference]: Start difference. First operand 232 states and 612 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:14,683 INFO L93 Difference]: Finished difference Result 189 states and 478 transitions. [2022-11-26 00:24:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:24:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:14,686 INFO L225 Difference]: With dead ends: 189 [2022-11-26 00:24:14,686 INFO L226 Difference]: Without dead ends: 189 [2022-11-26 00:24:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:14,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:14,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:24:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-26 00:24:14,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-26 00:24:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 116 states have (on average 4.120689655172414) internal successors, (478), 188 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:14,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 478 transitions. [2022-11-26 00:24:14,711 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 478 transitions. Word has length 3 [2022-11-26 00:24:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:14,712 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 478 transitions. [2022-11-26 00:24:14,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 478 transitions. [2022-11-26 00:24:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:24:14,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:14,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:24:14,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:14,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:14,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash 733769, now seen corresponding path program 1 times [2022-11-26 00:24:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717815309] [2022-11-26 00:24:14,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:14,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:14,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-26 00:24:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:24:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:15,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:15,101 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:24:15,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-26 00:24:15,128 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 10 treesize of output 8 [2022-11-26 00:24:15,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:15,198 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 [2022-11-26 00:24:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:15,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:15,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:15,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717815309] [2022-11-26 00:24:15,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717815309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:15,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:15,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:24:15,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866859627] [2022-11-26 00:24:15,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:15,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:15,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:15,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:15,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:15,237 INFO L87 Difference]: Start difference. First operand 189 states and 478 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:15,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:15,473 INFO L93 Difference]: Finished difference Result 146 states and 344 transitions. [2022-11-26 00:24:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:15,474 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:24:15,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:15,475 INFO L225 Difference]: With dead ends: 146 [2022-11-26 00:24:15,475 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 00:24:15,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:15,477 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:15,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:15,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 00:24:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-26 00:24:15,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 3.474747474747475) internal successors, (344), 145 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 344 transitions. [2022-11-26 00:24:15,486 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 344 transitions. Word has length 3 [2022-11-26 00:24:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:15,486 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 344 transitions. [2022-11-26 00:24:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 344 transitions. [2022-11-26 00:24:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:24:15,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:15,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:24:15,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:15,698 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:15,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash 731815, now seen corresponding path program 1 times [2022-11-26 00:24:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:15,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711202311] [2022-11-26 00:24:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:15,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:15,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:15,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:15,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-26 00:24:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:24:15,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:15,842 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:15,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:15,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:16,178 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:16,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711202311] [2022-11-26 00:24:16,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711202311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:16,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [249484328] [2022-11-26 00:24:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:16,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:24:16,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:24:16,185 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:24:16,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 00:24:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:24:16,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:16,405 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:16,405 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:16,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:16,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [249484328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:16,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264468146] [2022-11-26 00:24:16,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:16,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:16,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:16,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:16,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:24:16,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:24:16,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:16,711 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:16,712 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:16,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:16,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:16,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264468146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:16,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:24:16,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 00:24:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328128073] [2022-11-26 00:24:16,929 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:24:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:16,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:24:16,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:24:16,931 INFO L87 Difference]: Start difference. First operand 146 states and 344 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:19,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:19,277 INFO L93 Difference]: Finished difference Result 569 states and 1355 transitions. [2022-11-26 00:24:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:24:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:24:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:19,283 INFO L225 Difference]: With dead ends: 569 [2022-11-26 00:24:19,283 INFO L226 Difference]: Without dead ends: 569 [2022-11-26 00:24:19,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:24:19,284 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 377 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:19,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 0 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:24:19,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-26 00:24:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 152. [2022-11-26 00:24:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 105 states have (on average 3.3904761904761904) internal successors, (356), 151 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 356 transitions. [2022-11-26 00:24:19,296 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 356 transitions. Word has length 3 [2022-11-26 00:24:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:19,296 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 356 transitions. [2022-11-26 00:24:19,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 356 transitions. [2022-11-26 00:24:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:24:19,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:19,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:24:19,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:19,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-26 00:24:19,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:19,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:19,911 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:19,912 INFO L85 PathProgramCache]: Analyzing trace with hash 705165826, now seen corresponding path program 1 times [2022-11-26 00:24:19,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:19,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669557872] [2022-11-26 00:24:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:19,912 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:19,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 00:24:19,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:24:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:20,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:20,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:20,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669557872] [2022-11-26 00:24:20,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669557872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:20,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:24:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431009702] [2022-11-26 00:24:20,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:20,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:20,073 INFO L87 Difference]: Start difference. First operand 152 states and 356 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:20,522 INFO L93 Difference]: Finished difference Result 217 states and 478 transitions. [2022-11-26 00:24:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:24:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:24:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:20,524 INFO L225 Difference]: With dead ends: 217 [2022-11-26 00:24:20,524 INFO L226 Difference]: Without dead ends: 217 [2022-11-26 00:24:20,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:20,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:20,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:24:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-26 00:24:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 174. [2022-11-26 00:24:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 3.1968503937007875) internal successors, (406), 173 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:20,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 406 transitions. [2022-11-26 00:24:20,537 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 406 transitions. Word has length 5 [2022-11-26 00:24:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:20,538 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 406 transitions. [2022-11-26 00:24:20,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 406 transitions. [2022-11-26 00:24:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:24:20,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:20,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:24:20,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:20,756 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:20,756 INFO L85 PathProgramCache]: Analyzing trace with hash 705165960, now seen corresponding path program 1 times [2022-11-26 00:24:20,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:20,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582431008] [2022-11-26 00:24:20,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:20,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:20,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:20,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:20,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-26 00:24:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:24:20,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:20,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:20,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:20,923 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:24:20,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-26 00:24:20,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 00:24:20,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:20,984 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 [2022-11-26 00:24:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:21,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:21,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582431008] [2022-11-26 00:24:21,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582431008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:21,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:21,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:24:21,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938657884] [2022-11-26 00:24:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:21,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:21,075 INFO L87 Difference]: Start difference. First operand 174 states and 406 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:21,355 INFO L93 Difference]: Finished difference Result 160 states and 377 transitions. [2022-11-26 00:24:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:24:21,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:21,357 INFO L225 Difference]: With dead ends: 160 [2022-11-26 00:24:21,357 INFO L226 Difference]: Without dead ends: 160 [2022-11-26 00:24:21,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:21,358 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:21,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-26 00:24:21,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-26 00:24:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 123 states have (on average 3.065040650406504) internal successors, (377), 159 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 377 transitions. [2022-11-26 00:24:21,365 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 377 transitions. Word has length 5 [2022-11-26 00:24:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:21,365 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 377 transitions. [2022-11-26 00:24:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 377 transitions. [2022-11-26 00:24:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:24:21,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:21,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:24:21,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:21,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:21,578 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:21,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:21,579 INFO L85 PathProgramCache]: Analyzing trace with hash 705165962, now seen corresponding path program 1 times [2022-11-26 00:24:21,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:21,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940056154] [2022-11-26 00:24:21,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:21,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:21,580 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:21,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-26 00:24:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:24:21,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:21,710 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-26 00:24:21,711 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-26 00:24:21,747 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:24:21,748 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 [2022-11-26 00:24:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:21,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:21,762 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940056154] [2022-11-26 00:24:21,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940056154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:21,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:21,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:24:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378784861] [2022-11-26 00:24:21,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:21,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:24:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:24:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:21,763 INFO L87 Difference]: Start difference. First operand 160 states and 377 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:21,944 INFO L93 Difference]: Finished difference Result 146 states and 348 transitions. [2022-11-26 00:24:21,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:24:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:24:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:21,946 INFO L225 Difference]: With dead ends: 146 [2022-11-26 00:24:21,946 INFO L226 Difference]: Without dead ends: 146 [2022-11-26 00:24:21,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:24:21,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:21,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-26 00:24:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-26 00:24:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 2.9243697478991595) internal successors, (348), 145 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-11-26 00:24:21,953 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 5 [2022-11-26 00:24:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-11-26 00:24:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-11-26 00:24:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:24:21,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:21,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:24:21,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:24:22,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:22,166 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:22,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:22,167 INFO L85 PathProgramCache]: Analyzing trace with hash 331860675, now seen corresponding path program 1 times [2022-11-26 00:24:22,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:22,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368532529] [2022-11-26 00:24:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:22,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:22,168 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:22,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-26 00:24:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:24:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:24:22,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:22,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:22,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368532529] [2022-11-26 00:24:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1368532529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:22,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:24:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451232606] [2022-11-26 00:24:22,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:24:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:24:22,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:22,330 INFO L87 Difference]: Start difference. First operand 146 states and 348 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:22,862 INFO L93 Difference]: Finished difference Result 316 states and 742 transitions. [2022-11-26 00:24:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:24:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:24:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:22,865 INFO L225 Difference]: With dead ends: 316 [2022-11-26 00:24:22,865 INFO L226 Difference]: Without dead ends: 316 [2022-11-26 00:24:22,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:24:22,866 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:22,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:24:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-26 00:24:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 146. [2022-11-26 00:24:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 2.9243697478991595) internal successors, (348), 145 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:22,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-11-26 00:24:22,877 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 6 [2022-11-26 00:24:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:22,878 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-11-26 00:24:22,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-11-26 00:24:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:24:22,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:22,880 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 00:24:22,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:23,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash 330079112, now seen corresponding path program 2 times [2022-11-26 00:24:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:23,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [16558631] [2022-11-26 00:24:23,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:24:23,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:23,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:23,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-26 00:24:23,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:24:23,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:24:23,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:24:23,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:23,285 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:23,286 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:23,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:24,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:24,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [16558631] [2022-11-26 00:24:24,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [16558631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:24,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [284592388] [2022-11-26 00:24:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:24:24,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:24:24,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:24:24,216 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:24:24,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-26 00:24:24,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:24:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:24:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:24:24,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:24,512 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:24,513 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:24,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:25,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [284592388] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155948269] [2022-11-26 00:24:25,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:24:25,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:25,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:25,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:25,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:24:25,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:24:25,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:24:25,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:24:25,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:25,818 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:25,818 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:25,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:26,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155948269] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:26,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:24:26,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-26 00:24:26,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092545426] [2022-11-26 00:24:26,137 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:26,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:24:26,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:24:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:24:26,138 INFO L87 Difference]: Start difference. First operand 146 states and 348 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:29,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:31,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:34,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:36,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:39,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:40,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:41,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:43,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:45,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:46,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:24:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:51,870 INFO L93 Difference]: Finished difference Result 1231 states and 2977 transitions. [2022-11-26 00:24:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 00:24:51,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:24:51,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:51,879 INFO L225 Difference]: With dead ends: 1231 [2022-11-26 00:24:51,880 INFO L226 Difference]: Without dead ends: 1231 [2022-11-26 00:24:51,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:24:51,881 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 853 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:51,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 0 Invalid, 1042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 965 Invalid, 2 Unknown, 0 Unchecked, 24.0s Time] [2022-11-26 00:24:51,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-26 00:24:51,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 164. [2022-11-26 00:24:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 137 states have (on average 2.802919708029197) internal successors, (384), 163 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:51,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 384 transitions. [2022-11-26 00:24:51,897 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 384 transitions. Word has length 6 [2022-11-26 00:24:51,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:51,897 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 384 transitions. [2022-11-26 00:24:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:51,897 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 384 transitions. [2022-11-26 00:24:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:24:51,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:51,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:51,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:24:52,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:52,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:52,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:52,511 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:52,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash -940328395, now seen corresponding path program 1 times [2022-11-26 00:24:52,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058103597] [2022-11-26 00:24:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:52,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:52,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:52,514 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:52,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-26 00:24:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:24:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:52,609 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 [2022-11-26 00:24:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:52,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:52,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:52,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058103597] [2022-11-26 00:24:52,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058103597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:52,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:52,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:24:52,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580150180] [2022-11-26 00:24:52,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:52,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:52,634 INFO L87 Difference]: Start difference. First operand 164 states and 384 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:52,836 INFO L93 Difference]: Finished difference Result 134 states and 309 transitions. [2022-11-26 00:24:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:24:52,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:24:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:52,839 INFO L225 Difference]: With dead ends: 134 [2022-11-26 00:24:52,839 INFO L226 Difference]: Without dead ends: 134 [2022-11-26 00:24:52,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:52,839 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:52,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-26 00:24:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-26 00:24:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 116 states have (on average 2.663793103448276) internal successors, (309), 133 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:52,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 309 transitions. [2022-11-26 00:24:52,845 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 309 transitions. Word has length 7 [2022-11-26 00:24:52,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:52,845 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 309 transitions. [2022-11-26 00:24:52,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 309 transitions. [2022-11-26 00:24:52,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:24:52,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:52,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:52,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:53,058 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash -940328394, now seen corresponding path program 1 times [2022-11-26 00:24:53,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:53,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603230375] [2022-11-26 00:24:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:53,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:53,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:53,061 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:53,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-26 00:24:53,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:24:53,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:53,181 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 [2022-11-26 00:24:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:53,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:53,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:53,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603230375] [2022-11-26 00:24:53,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603230375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:53,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:53,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:24:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092156529] [2022-11-26 00:24:53,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:53,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:24:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:24:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:53,283 INFO L87 Difference]: Start difference. First operand 134 states and 309 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:53,707 INFO L93 Difference]: Finished difference Result 200 states and 475 transitions. [2022-11-26 00:24:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:24:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:24:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:53,709 INFO L225 Difference]: With dead ends: 200 [2022-11-26 00:24:53,709 INFO L226 Difference]: Without dead ends: 200 [2022-11-26 00:24:53,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:24:53,710 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:53,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:24:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-26 00:24:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2022-11-26 00:24:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 132 states have (on average 3.015151515151515) internal successors, (398), 149 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 398 transitions. [2022-11-26 00:24:53,718 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 398 transitions. Word has length 7 [2022-11-26 00:24:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:53,718 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 398 transitions. [2022-11-26 00:24:53,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 398 transitions. [2022-11-26 00:24:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:24:53,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:53,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:53,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:24:53,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:53,932 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:53,933 INFO L85 PathProgramCache]: Analyzing trace with hash -940328359, now seen corresponding path program 1 times [2022-11-26 00:24:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:53,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1119674133] [2022-11-26 00:24:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:53,934 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:53,935 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:53,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:24:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:54,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:24:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:54,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:54,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1119674133] [2022-11-26 00:24:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1119674133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:54,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:54,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:24:54,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693734776] [2022-11-26 00:24:54,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:54,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:54,152 INFO L87 Difference]: Start difference. First operand 150 states and 398 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:54,496 INFO L93 Difference]: Finished difference Result 170 states and 425 transitions. [2022-11-26 00:24:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:24:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:24:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:54,498 INFO L225 Difference]: With dead ends: 170 [2022-11-26 00:24:54,498 INFO L226 Difference]: Without dead ends: 170 [2022-11-26 00:24:54,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:54,499 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:54,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:24:54,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-26 00:24:54,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 161. [2022-11-26 00:24:54,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 143 states have (on average 2.9160839160839163) internal successors, (417), 160 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 417 transitions. [2022-11-26 00:24:54,507 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 417 transitions. Word has length 7 [2022-11-26 00:24:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:54,507 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 417 transitions. [2022-11-26 00:24:54,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 417 transitions. [2022-11-26 00:24:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:24:54,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:54,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:54,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:54,709 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688354, now seen corresponding path program 1 times [2022-11-26 00:24:54,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:54,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115543935] [2022-11-26 00:24:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:54,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:54,712 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:54,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-26 00:24:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:54,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:24:54,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:54,941 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:24:54,942 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:24:54,997 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:24:54,998 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 [2022-11-26 00:24:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:24:55,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:24:55,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:55,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115543935] [2022-11-26 00:24:55,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115543935] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:24:55,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:24:55,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:24:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227615918] [2022-11-26 00:24:55,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:24:55,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:24:55,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:24:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:24:55,015 INFO L87 Difference]: Start difference. First operand 161 states and 417 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:24:55,213 INFO L93 Difference]: Finished difference Result 133 states and 327 transitions. [2022-11-26 00:24:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:24:55,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:24:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:24:55,215 INFO L225 Difference]: With dead ends: 133 [2022-11-26 00:24:55,215 INFO L226 Difference]: Without dead ends: 133 [2022-11-26 00:24:55,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:24:55,216 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:24:55,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:24:55,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-26 00:24:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-11-26 00:24:55,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 2.680327868852459) internal successors, (327), 132 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 327 transitions. [2022-11-26 00:24:55,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 327 transitions. Word has length 7 [2022-11-26 00:24:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:24:55,221 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 327 transitions. [2022-11-26 00:24:55,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 327 transitions. [2022-11-26 00:24:55,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:24:55,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:24:55,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:24:55,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:24:55,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:55,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:24:55,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:24:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688355, now seen corresponding path program 1 times [2022-11-26 00:24:55,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:24:55,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1671083541] [2022-11-26 00:24:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:55,424 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:24:55,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:24:55,425 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:24:55,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-26 00:24:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:24:55,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:55,655 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:55,655 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:55,731 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:24:55,731 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:24:55,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:55,876 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 [2022-11-26 00:24:55,887 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:24:55,887 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 [2022-11-26 00:24:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:24:56,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:24:56,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:24:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1671083541] [2022-11-26 00:24:56,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1671083541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:56,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227143103] [2022-11-26 00:24:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:56,651 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:24:56,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:24:56,652 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:24:56,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-26 00:24:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:56,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:24:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:56,957 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:56,957 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:57,032 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:24:57,032 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:24:57,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:24:57,195 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 [2022-11-26 00:24:57,222 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:24:57,222 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 [2022-11-26 00:24:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:24:57,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:24:57,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1227143103] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:57,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306741623] [2022-11-26 00:24:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:24:57,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:24:57,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:24:57,611 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:24:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:24:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:24:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:24:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:24:57,811 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:24:57,811 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:24:57,960 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:24:57,960 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 16 treesize of output 22 [2022-11-26 00:24:58,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:24:58,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:25:00,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:25:00,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306741623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:25:00,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:25:00,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 16 [2022-11-26 00:25:00,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177474640] [2022-11-26 00:25:00,438 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:25:00,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:25:00,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:25:00,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:25:00,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:25:00,439 INFO L87 Difference]: Start difference. First operand 133 states and 327 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:25:40,876 WARN L233 SmtUtils]: Spent 39.80s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:25:49,013 WARN L233 SmtUtils]: Spent 7.48s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:16,464 WARN L233 SmtUtils]: Spent 27.08s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:38,215 WARN L233 SmtUtils]: Spent 21.48s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:50,583 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] [2022-11-26 00:26:54,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:26:56,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:26:59,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:01,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:03,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:05,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:07,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:11,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:15,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:17,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:18,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:21,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:23,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:25,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:27:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:25,782 INFO L93 Difference]: Finished difference Result 676 states and 1687 transitions. [2022-11-26 00:27:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:27:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:27:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:25,787 INFO L225 Difference]: With dead ends: 676 [2022-11-26 00:27:25,788 INFO L226 Difference]: Without dead ends: 676 [2022-11-26 00:27:25,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 112.4s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:27:25,789 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 524 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 44 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:25,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 0 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 586 Invalid, 14 Unknown, 0 Unchecked, 35.6s Time] [2022-11-26 00:27:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-26 00:27:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 157. [2022-11-26 00:27:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 146 states have (on average 2.7945205479452055) internal successors, (408), 156 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 408 transitions. [2022-11-26 00:27:25,798 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 408 transitions. Word has length 7 [2022-11-26 00:27:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:25,798 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 408 transitions. [2022-11-26 00:27:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 408 transitions. [2022-11-26 00:27:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:27:25,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:25,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:25,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:26,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:26,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:26,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:27:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688472, now seen corresponding path program 1 times [2022-11-26 00:27:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:26,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514924365] [2022-11-26 00:27:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:26,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:26,414 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:26,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-26 00:27:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:26,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:27:26,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:26,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:26,769 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 35 treesize of output 31 [2022-11-26 00:27:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:26,941 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514924365] [2022-11-26 00:27:26,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514924365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30192033] [2022-11-26 00:27:26,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:26,941 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:27:26,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:27:26,942 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:27:26,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-26 00:27:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:27:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:27,146 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 [2022-11-26 00:27:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:27,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:27,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30192033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:27,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608113580] [2022-11-26 00:27:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:27,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:27,843 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:27,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:27:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:27:27,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:27,986 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 [2022-11-26 00:27:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:28,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:28,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608113580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:28,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:27:28,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 13 [2022-11-26 00:27:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203573097] [2022-11-26 00:27:28,337 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:27:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:27:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:27:28,338 INFO L87 Difference]: Start difference. First operand 157 states and 408 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:31,483 INFO L93 Difference]: Finished difference Result 548 states and 1410 transitions. [2022-11-26 00:27:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:27:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:27:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:31,487 INFO L225 Difference]: With dead ends: 548 [2022-11-26 00:27:31,487 INFO L226 Difference]: Without dead ends: 548 [2022-11-26 00:27:31,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:27:31,488 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 294 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:31,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 0 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:27:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-26 00:27:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 169. [2022-11-26 00:27:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 158 states have (on average 2.867088607594937) internal successors, (453), 168 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 453 transitions. [2022-11-26 00:27:31,497 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 453 transitions. Word has length 7 [2022-11-26 00:27:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:31,498 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 453 transitions. [2022-11-26 00:27:31,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 453 transitions. [2022-11-26 00:27:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:27:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:31,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:31,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:31,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:31,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:32,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:32,111 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:27:32,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:32,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1090674394, now seen corresponding path program 1 times [2022-11-26 00:27:32,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:32,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976148494] [2022-11-26 00:27:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:32,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:32,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:32,113 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-26 00:27:32,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:27:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:32,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:32,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:32,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976148494] [2022-11-26 00:27:32,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976148494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:32,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:32,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:27:32,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79618411] [2022-11-26 00:27:32,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:32,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:27:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:32,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:27:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:32,351 INFO L87 Difference]: Start difference. First operand 169 states and 453 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:32,789 INFO L93 Difference]: Finished difference Result 222 states and 532 transitions. [2022-11-26 00:27:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:27:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:32,791 INFO L225 Difference]: With dead ends: 222 [2022-11-26 00:27:32,791 INFO L226 Difference]: Without dead ends: 222 [2022-11-26 00:27:32,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:32,792 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:32,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:27:32,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-26 00:27:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 158. [2022-11-26 00:27:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 147 states have (on average 2.870748299319728) internal successors, (422), 157 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:32,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 422 transitions. [2022-11-26 00:27:32,797 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 422 transitions. Word has length 8 [2022-11-26 00:27:32,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:32,798 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 422 transitions. [2022-11-26 00:27:32,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:32,798 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 422 transitions. [2022-11-26 00:27:32,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:27:32,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:32,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:32,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:33,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:33,010 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:27:33,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:33,011 INFO L85 PathProgramCache]: Analyzing trace with hash -609043369, now seen corresponding path program 1 times [2022-11-26 00:27:33,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:33,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1448805571] [2022-11-26 00:27:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:33,011 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:33,012 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-26 00:27:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:27:33,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:33,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:33,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1448805571] [2022-11-26 00:27:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1448805571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1486485542] [2022-11-26 00:27:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:33,505 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:27:33,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:27:33,506 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:27:33,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-26 00:27:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:33,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:27:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:33,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:34,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1486485542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:34,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727292960] [2022-11-26 00:27:34,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:34,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:34,224 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:34,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:27:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:27:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:34,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:34,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727292960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:34,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:27:34,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 20 [2022-11-26 00:27:34,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726141363] [2022-11-26 00:27:34,583 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:34,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:27:34,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:34,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:27:34,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:27:34,584 INFO L87 Difference]: Start difference. First operand 158 states and 422 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:38,766 INFO L93 Difference]: Finished difference Result 695 states and 1684 transitions. [2022-11-26 00:27:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:27:38,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:27:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:38,771 INFO L225 Difference]: With dead ends: 695 [2022-11-26 00:27:38,771 INFO L226 Difference]: Without dead ends: 695 [2022-11-26 00:27:38,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:27:38,772 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 786 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:38,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 0 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-26 00:27:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-11-26 00:27:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 230. [2022-11-26 00:27:38,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 219 states have (on average 3.0045662100456623) internal successors, (658), 229 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:38,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 658 transitions. [2022-11-26 00:27:38,785 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 658 transitions. Word has length 9 [2022-11-26 00:27:38,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:38,786 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 658 transitions. [2022-11-26 00:27:38,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:38,786 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 658 transitions. [2022-11-26 00:27:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:27:38,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:38,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:38,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:39,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:39,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:39,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:27:39,394 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:27:39,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:39,395 INFO L85 PathProgramCache]: Analyzing trace with hash -608918663, now seen corresponding path program 1 times [2022-11-26 00:27:39,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:39,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709972489] [2022-11-26 00:27:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:39,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:39,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:39,396 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:39,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-26 00:27:39,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:27:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:39,684 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:27:39,684 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:27:39,768 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:27:39,768 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:27:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:39,905 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 [2022-11-26 00:27:39,929 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:27:39,930 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 [2022-11-26 00:27:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:40,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:40,816 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709972489] [2022-11-26 00:27:40,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709972489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:40,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [971240319] [2022-11-26 00:27:40,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:40,817 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:27:40,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:27:40,818 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:27:40,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 00:27:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:27:41,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:41,202 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:27:41,203 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:27:41,282 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:27:41,283 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:27:41,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:41,462 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 [2022-11-26 00:27:41,486 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:27:41,487 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 [2022-11-26 00:27:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:41,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:27:41,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [971240319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:41,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22843510] [2022-11-26 00:27:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:41,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:27:41,939 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:27:41,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:27:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:27:42,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:42,152 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:27:42,152 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:27:42,294 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:27:42,295 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 16 treesize of output 22 [2022-11-26 00:27:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:42,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:27:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:27:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22843510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:27:44,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:27:44,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 16 [2022-11-26 00:27:44,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953240570] [2022-11-26 00:27:44,187 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:27:44,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:27:44,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:44,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:27:44,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:27:44,188 INFO L87 Difference]: Start difference. First operand 230 states and 658 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:28:15,405 WARN L233 SmtUtils]: Spent 30.34s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:28:24,906 WARN L233 SmtUtils]: Spent 8.81s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:28:51,850 WARN L233 SmtUtils]: Spent 26.49s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:17,922 WARN L233 SmtUtils]: Spent 25.78s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:28,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:29:31,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:29:33,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:29:36,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:29:43,514 WARN L233 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:50,341 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:29:52,347 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] [2022-11-26 00:29:53,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:29:53,294 INFO L93 Difference]: Finished difference Result 543 states and 1292 transitions. [2022-11-26 00:29:53,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:29:53,296 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:29:53,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:29:53,298 INFO L225 Difference]: With dead ends: 543 [2022-11-26 00:29:53,298 INFO L226 Difference]: Without dead ends: 543 [2022-11-26 00:29:53,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 115.0s TimeCoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:29:53,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 335 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 34 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:29:53,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 0 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 630 Invalid, 5 Unknown, 0 Unchecked, 16.3s Time] [2022-11-26 00:29:53,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-11-26 00:29:53,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 260. [2022-11-26 00:29:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 249 states have (on average 2.9839357429718874) internal successors, (743), 259 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 743 transitions. [2022-11-26 00:29:53,310 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 743 transitions. Word has length 9 [2022-11-26 00:29:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:29:53,311 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 743 transitions. [2022-11-26 00:29:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:29:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 743 transitions. [2022-11-26 00:29:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:29:53,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:29:53,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:29:53,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:53,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:53,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:29:53,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:53,925 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:29:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:29:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1696606226, now seen corresponding path program 1 times [2022-11-26 00:29:53,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:29:53,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303401135] [2022-11-26 00:29:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:29:53,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:29:53,928 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:29:53,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-26 00:29:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:29:54,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:54,092 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 [2022-11-26 00:29:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:29:54,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:29:55,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:29:55,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303401135] [2022-11-26 00:29:55,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303401135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:55,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1988082427] [2022-11-26 00:29:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:55,149 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:29:55,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:29:55,151 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:29:55,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 00:29:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:55,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:29:55,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:29:55,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:29:55,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1988082427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:55,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456153232] [2022-11-26 00:29:55,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:29:55,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:29:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:29:55,932 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:29:55,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:29:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:29:56,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:29:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:29:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:29:56,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:29:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:29:56,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456153232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:29:56,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:29:56,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-26 00:29:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750522048] [2022-11-26 00:29:56,208 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:29:56,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-26 00:29:56,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:29:56,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-26 00:29:56,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-26 00:29:56,210 INFO L87 Difference]: Start difference. First operand 260 states and 743 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:01,296 INFO L93 Difference]: Finished difference Result 587 states and 1621 transitions. [2022-11-26 00:30:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:30:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:30:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:01,301 INFO L225 Difference]: With dead ends: 587 [2022-11-26 00:30:01,301 INFO L226 Difference]: Without dead ends: 587 [2022-11-26 00:30:01,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-11-26 00:30:01,302 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 414 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:01,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 0 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-26 00:30:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-11-26 00:30:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 351. [2022-11-26 00:30:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 340 states have (on average 3.4382352941176473) internal successors, (1169), 350 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1169 transitions. [2022-11-26 00:30:01,317 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1169 transitions. Word has length 10 [2022-11-26 00:30:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:01,317 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 1169 transitions. [2022-11-26 00:30:01,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1169 transitions. [2022-11-26 00:30:01,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:30:01,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:01,319 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:01,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:01,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:01,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:01,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:30:01,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:30:01,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:01,927 INFO L85 PathProgramCache]: Analyzing trace with hash -151207036, now seen corresponding path program 2 times [2022-11-26 00:30:01,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:30:01,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265304109] [2022-11-26 00:30:01,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:30:01,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:30:01,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:30:01,929 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:30:01,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-26 00:30:02,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:30:02,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:02,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:30:02,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:02,123 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:30:02,124 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:30:02,196 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:30:02,196 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:30:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:02,327 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 [2022-11-26 00:30:02,339 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:30:02,340 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 [2022-11-26 00:30:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:30:02,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:30:02,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:30:02,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265304109] [2022-11-26 00:30:02,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265304109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:30:02,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:30:02,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:30:02,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608875742] [2022-11-26 00:30:02,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:30:02,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:30:02,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:30:02,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:30:02,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:30:02,416 INFO L87 Difference]: Start difference. First operand 351 states and 1169 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:02,772 INFO L93 Difference]: Finished difference Result 429 states and 1359 transitions. [2022-11-26 00:30:02,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:30:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:30:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:02,775 INFO L225 Difference]: With dead ends: 429 [2022-11-26 00:30:02,775 INFO L226 Difference]: Without dead ends: 429 [2022-11-26 00:30:02,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:30:02,776 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:02,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:30:02,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-26 00:30:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 323. [2022-11-26 00:30:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 312 states have (on average 3.2403846153846154) internal successors, (1011), 322 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:02,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1011 transitions. [2022-11-26 00:30:02,787 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1011 transitions. Word has length 10 [2022-11-26 00:30:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:02,788 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 1011 transitions. [2022-11-26 00:30:02,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:02,788 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1011 transitions. [2022-11-26 00:30:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:30:02,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:02,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:02,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:03,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:30:03,001 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:30:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:03,001 INFO L85 PathProgramCache]: Analyzing trace with hash 702109680, now seen corresponding path program 1 times [2022-11-26 00:30:03,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:30:03,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883400884] [2022-11-26 00:30:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:03,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:30:03,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:30:03,002 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:30:03,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-26 00:30:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:30:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:03,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:30:03,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:30:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883400884] [2022-11-26 00:30:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883400884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1960807096] [2022-11-26 00:30:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:30:03,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:30:03,634 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:30:03,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-26 00:30:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:30:03,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:04,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:04,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1960807096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910628796] [2022-11-26 00:30:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:30:04,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:04,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:04,086 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:04,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-26 00:30:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:30:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:30:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:04,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910628796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:04,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:30:04,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5, 5, 5, 5] total 13 [2022-11-26 00:30:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934856106] [2022-11-26 00:30:04,423 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-26 00:30:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:30:04,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-26 00:30:04,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:30:04,424 INFO L87 Difference]: Start difference. First operand 323 states and 1011 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:30:05,790 INFO L93 Difference]: Finished difference Result 469 states and 1195 transitions. [2022-11-26 00:30:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:30:05,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:30:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:30:05,792 INFO L225 Difference]: With dead ends: 469 [2022-11-26 00:30:05,792 INFO L226 Difference]: Without dead ends: 469 [2022-11-26 00:30:05,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:30:05,793 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 207 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:30:05,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 0 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:30:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-11-26 00:30:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 286. [2022-11-26 00:30:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 275 states have (on average 3.0654545454545454) internal successors, (843), 285 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 843 transitions. [2022-11-26 00:30:05,804 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 843 transitions. Word has length 11 [2022-11-26 00:30:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:30:05,805 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 843 transitions. [2022-11-26 00:30:05,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:05,805 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 843 transitions. [2022-11-26 00:30:05,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:30:05,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:30:05,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:30:05,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:06,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:06,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-26 00:30:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:06,410 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:30:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:30:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 641895287, now seen corresponding path program 2 times [2022-11-26 00:30:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:30:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145841683] [2022-11-26 00:30:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:30:06,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:30:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:30:06,412 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:30:06,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-26 00:30:06,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:30:06,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:30:06,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:06,692 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:30:06,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-26 00:30:06,772 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:30:06,773 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:30:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:06,910 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 [2022-11-26 00:30:06,929 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:30:06,929 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 [2022-11-26 00:30:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:07,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:08,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:30:08,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145841683] [2022-11-26 00:30:08,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145841683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:08,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525063953] [2022-11-26 00:30:08,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:30:08,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:30:08,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:30:08,235 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:30:08,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-26 00:30:08,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:30:08,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:30:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:08,643 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:30:08,643 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:30:08,720 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:30:08,720 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:30:08,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:08,981 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 19 treesize of output 19 [2022-11-26 00:30:08,998 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:30:08,999 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 [2022-11-26 00:30:09,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:09,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:10,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525063953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:10,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687177704] [2022-11-26 00:30:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:30:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:30:10,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:30:10,636 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:30:10,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:30:10,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:30:10,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:30:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:30:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:30:10,924 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:30:10,924 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:30:11,003 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:30:11,004 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:30:11,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:30:11,221 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 21 treesize of output 21 [2022-11-26 00:30:11,250 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:30:11,250 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 [2022-11-26 00:30:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:11,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:30:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:30:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687177704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:30:13,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:30:13,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 23 [2022-11-26 00:30:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605716548] [2022-11-26 00:30:13,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:30:13,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-26 00:30:13,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:30:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-26 00:30:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:30:13,668 INFO L87 Difference]: Start difference. First operand 286 states and 843 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:30:35,883 WARN L233 SmtUtils]: Spent 10.96s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:30:54,018 WARN L233 SmtUtils]: Spent 15.56s on a formula simplification. DAG size of input: 84 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:06,415 WARN L233 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:31:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:14,677 INFO L93 Difference]: Finished difference Result 1575 states and 4500 transitions. [2022-11-26 00:31:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:31:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:31:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:14,685 INFO L225 Difference]: With dead ends: 1575 [2022-11-26 00:31:14,685 INFO L226 Difference]: Without dead ends: 1575 [2022-11-26 00:31:14,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 50.9s TimeCoverageRelationStatistics Valid=548, Invalid=2104, Unknown=0, NotChecked=0, Total=2652 [2022-11-26 00:31:14,687 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1050 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:14,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 0 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 14.2s Time] [2022-11-26 00:31:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2022-11-26 00:31:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 432. [2022-11-26 00:31:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 421 states have (on average 3.5843230403800477) internal successors, (1509), 431 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1509 transitions. [2022-11-26 00:31:14,713 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1509 transitions. Word has length 11 [2022-11-26 00:31:14,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:14,714 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 1509 transitions. [2022-11-26 00:31:14,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1509 transitions. [2022-11-26 00:31:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:31:14,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:14,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:14,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:14,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:15,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:15,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:15,329 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:31:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 641895404, now seen corresponding path program 1 times [2022-11-26 00:31:15,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:31:15,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987306093] [2022-11-26 00:31:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:31:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:31:15,330 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:31:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-26 00:31:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:31:15,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:15,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:15,915 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 36 treesize of output 32 [2022-11-26 00:31:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:16,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:31:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987306093] [2022-11-26 00:31:16,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1987306093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1229360099] [2022-11-26 00:31:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:16,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:31:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:31:16,254 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:31:16,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-26 00:31:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:31:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:16,567 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 [2022-11-26 00:31:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:16,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:18,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1229360099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:18,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409914567] [2022-11-26 00:31:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:31:18,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:18,024 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-26 00:31:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:31:18,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:31:18,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:18,238 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 5 [2022-11-26 00:31:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:18,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409914567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:18,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:31:18,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 22 [2022-11-26 00:31:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986674572] [2022-11-26 00:31:18,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:31:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:31:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:31:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:31:18,949 INFO L87 Difference]: Start difference. First operand 432 states and 1509 transitions. Second operand has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:24,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:31:24,907 INFO L93 Difference]: Finished difference Result 1700 states and 5562 transitions. [2022-11-26 00:31:24,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:31:24,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:31:24,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:31:24,918 INFO L225 Difference]: With dead ends: 1700 [2022-11-26 00:31:24,918 INFO L226 Difference]: Without dead ends: 1700 [2022-11-26 00:31:24,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:31:24,919 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 651 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:31:24,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 0 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:31:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-11-26 00:31:24,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 468. [2022-11-26 00:31:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 457 states have (on average 3.586433260393873) internal successors, (1639), 467 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1639 transitions. [2022-11-26 00:31:24,943 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1639 transitions. Word has length 11 [2022-11-26 00:31:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:31:24,944 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 1639 transitions. [2022-11-26 00:31:24,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:31:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1639 transitions. [2022-11-26 00:31:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:31:24,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:31:24,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:31:24,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:25,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:25,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-26 00:31:25,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:25,549 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:31:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:31:25,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1572213519, now seen corresponding path program 2 times [2022-11-26 00:31:25,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:31:25,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677805637] [2022-11-26 00:31:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:31:25,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:31:25,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:31:25,551 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:31:25,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-26 00:31:25,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:31:25,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:25,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:31:25,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:25,827 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:31:25,827 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-26 00:31:25,896 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:31:25,896 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:31:25,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:25,996 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 [2022-11-26 00:31:26,011 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:31:26,012 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 [2022-11-26 00:31:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:26,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:27,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:31:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677805637] [2022-11-26 00:31:27,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677805637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:27,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974554532] [2022-11-26 00:31:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:31:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:31:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:31:27,221 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:31:27,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-26 00:31:27,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:31:27,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:27,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:31:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:27,758 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:31:27,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:31:27,841 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:31:27,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:31:28,140 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:31:28,140 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 23 treesize of output 27 [2022-11-26 00:31:28,211 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:31:28,212 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 [2022-11-26 00:31:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:29,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:31:33,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1974554532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:33,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898560902] [2022-11-26 00:31:33,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:31:33,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:31:33,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:31:33,855 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:31:33,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-26 00:31:34,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:31:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:31:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:31:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:31:34,162 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:31:34,162 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:31:34,241 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:31:34,241 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:31:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:31:34,499 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 19 treesize of output 19 [2022-11-26 00:31:34,512 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:31:34,512 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 [2022-11-26 00:31:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:34,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:31:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:31:37,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898560902] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:31:37,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:31:37,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 5, 5] total 33 [2022-11-26 00:31:37,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829866100] [2022-11-26 00:31:37,422 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:31:37,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:31:37,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:31:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:31:37,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:31:37,424 INFO L87 Difference]: Start difference. First operand 468 states and 1639 transitions. Second operand has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:32:02,701 WARN L233 SmtUtils]: Spent 12.42s on a formula simplification. DAG size of input: 124 DAG size of output: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:32:45,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:32:45,229 INFO L93 Difference]: Finished difference Result 1397 states and 3803 transitions. [2022-11-26 00:32:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-26 00:32:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:32:45,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:32:45,240 INFO L225 Difference]: With dead ends: 1397 [2022-11-26 00:32:45,240 INFO L226 Difference]: Without dead ends: 1397 [2022-11-26 00:32:45,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 53.8s TimeCoverageRelationStatistics Valid=1002, Invalid=4548, Unknown=0, NotChecked=0, Total=5550 [2022-11-26 00:32:45,243 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1343 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2596 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:32:45,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 0 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2596 Invalid, 0 Unknown, 0 Unchecked, 21.6s Time] [2022-11-26 00:32:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-11-26 00:32:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 558. [2022-11-26 00:32:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 547 states have (on average 3.612431444241316) internal successors, (1976), 557 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:32:45,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1976 transitions. [2022-11-26 00:32:45,267 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1976 transitions. Word has length 12 [2022-11-26 00:32:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:32:45,268 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 1976 transitions. [2022-11-26 00:32:45,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:32:45,268 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1976 transitions. [2022-11-26 00:32:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:32:45,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:32:45,269 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-26 00:32:45,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:45,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:45,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-26 00:32:45,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:32:45,873 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:32:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:32:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -756877528, now seen corresponding path program 3 times [2022-11-26 00:32:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:32:45,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523202542] [2022-11-26 00:32:45,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:32:45,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:32:45,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:32:45,876 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:32:45,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-26 00:32:46,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:32:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:32:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:32:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:46,247 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:32:46,248 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:32:47,069 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:47,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:51,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:32:51,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523202542] [2022-11-26 00:32:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523202542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:51,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76441992] [2022-11-26 00:32:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:32:51,607 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:32:51,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:32:51,609 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:32:51,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-26 00:32:52,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:32:52,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:32:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:32:52,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:32:52,668 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:32:52,669 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:32:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:53,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:32:58,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:32:58,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76441992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:32:58,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657184399] [2022-11-26 00:32:58,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:32:58,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:32:58,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:32:58,260 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:32:58,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-26 00:33:00,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:33:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:33:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:33:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:33:00,435 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:33:00,435 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:33:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:33:00,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:33:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:33:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657184399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:33:01,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:33:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-26 00:33:01,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219306787] [2022-11-26 00:33:01,295 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:33:01,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:33:01,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:33:01,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:33:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:33:01,297 INFO L87 Difference]: Start difference. First operand 558 states and 1976 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:33:16,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:18,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:20,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:22,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:24,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:26,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:28,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:30,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:32,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:34,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:36,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:38,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:40,926 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:42,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:44,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:47,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:49,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:33:51,008 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 [] [2022-11-26 00:34:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:04,534 INFO L93 Difference]: Finished difference Result 4420 states and 16046 transitions. [2022-11-26 00:34:04,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:34:04,537 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:34:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:04,564 INFO L225 Difference]: With dead ends: 4420 [2022-11-26 00:34:04,565 INFO L226 Difference]: Without dead ends: 4420 [2022-11-26 00:34:04,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=610, Invalid=1282, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:34:04,566 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2629 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 321 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:04,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2629 Valid, 0 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 3106 Invalid, 18 Unknown, 0 Unchecked, 46.6s Time] [2022-11-26 00:34:04,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2022-11-26 00:34:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 578. [2022-11-26 00:34:04,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 567 states have (on average 3.5555555555555554) internal successors, (2016), 577 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 2016 transitions. [2022-11-26 00:34:04,613 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 2016 transitions. Word has length 12 [2022-11-26 00:34:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:04,613 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 2016 transitions. [2022-11-26 00:34:04,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 2016 transitions. [2022-11-26 00:34:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:34:04,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:04,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:04,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:04,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:05,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:05,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:34:05,225 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:34:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash 693368008, now seen corresponding path program 1 times [2022-11-26 00:34:05,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:34:05,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1426017813] [2022-11-26 00:34:05,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:05,226 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:34:05,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:34:05,227 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:34:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-26 00:34:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:05,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:34:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:05,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:34:05,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:34:05,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1426017813] [2022-11-26 00:34:05,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1426017813] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:34:05,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:34:05,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:34:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719785823] [2022-11-26 00:34:05,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:34:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:34:05,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:34:05,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:34:05,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:05,485 INFO L87 Difference]: Start difference. First operand 578 states and 2016 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:05,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:05,729 INFO L93 Difference]: Finished difference Result 629 states and 2120 transitions. [2022-11-26 00:34:05,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:34:05,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:34:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:05,734 INFO L225 Difference]: With dead ends: 629 [2022-11-26 00:34:05,734 INFO L226 Difference]: Without dead ends: 611 [2022-11-26 00:34:05,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:34:05,735 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:05,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:34:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-11-26 00:34:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 609. [2022-11-26 00:34:05,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 598 states have (on average 3.423076923076923) internal successors, (2047), 608 states have internal predecessors, (2047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:05,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 2047 transitions. [2022-11-26 00:34:05,752 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 2047 transitions. Word has length 13 [2022-11-26 00:34:05,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:05,753 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 2047 transitions. [2022-11-26 00:34:05,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:05,753 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 2047 transitions. [2022-11-26 00:34:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:34:05,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:05,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:34:05,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:05,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:34:05,967 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:34:05,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:05,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1613899861, now seen corresponding path program 3 times [2022-11-26 00:34:05,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:34:05,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956990517] [2022-11-26 00:34:05,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:05,968 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:34:05,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:34:05,969 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:34:05,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-26 00:34:06,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:34:06,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:06,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:34:06,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:06,310 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 [2022-11-26 00:34:06,428 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 15 treesize of output 11 [2022-11-26 00:34:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:06,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:07,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:34:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956990517] [2022-11-26 00:34:07,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956990517] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:07,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1589235581] [2022-11-26 00:34:07,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:07,307 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:34:07,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:34:07,308 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:34:07,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-26 00:34:07,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:34:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:34:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:07,959 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 [2022-11-26 00:34:08,328 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 15 treesize of output 11 [2022-11-26 00:34:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:08,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:09,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1589235581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:09,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412697383] [2022-11-26 00:34:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:09,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:09,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:09,975 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:09,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-26 00:34:10,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:34:10,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:10,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:34:10,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:11,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:12,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:34:12,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412697383] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:12,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:34:12,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 6] total 35 [2022-11-26 00:34:12,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296772864] [2022-11-26 00:34:12,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:12,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:34:12,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:34:12,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:34:12,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:34:12,106 INFO L87 Difference]: Start difference. First operand 609 states and 2047 transitions. Second operand has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:33,211 INFO L93 Difference]: Finished difference Result 1518 states and 3983 transitions. [2022-11-26 00:34:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-26 00:34:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:34:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:33,217 INFO L225 Difference]: With dead ends: 1518 [2022-11-26 00:34:33,217 INFO L226 Difference]: Without dead ends: 1518 [2022-11-26 00:34:33,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1057, Invalid=4949, Unknown=0, NotChecked=0, Total=6006 [2022-11-26 00:34:33,220 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:33,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2102 Valid, 0 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2512 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-11-26 00:34:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2022-11-26 00:34:33,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 562. [2022-11-26 00:34:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 551 states have (on average 3.17059891107078) internal successors, (1747), 561 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1747 transitions. [2022-11-26 00:34:33,250 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1747 transitions. Word has length 13 [2022-11-26 00:34:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:33,250 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 1747 transitions. [2022-11-26 00:34:33,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1747 transitions. [2022-11-26 00:34:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:34:33,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:33,252 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:34:33,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:33,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:33,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:33,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:33,859 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:34:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash -980216230, now seen corresponding path program 3 times [2022-11-26 00:34:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:34:33,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583117267] [2022-11-26 00:34:33,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:33,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:34:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:34:33,861 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:34:33,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-26 00:34:34,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:34:34,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:34:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:34,240 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:34:34,240 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:34:34,337 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:34:34,337 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:34:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:34:34,463 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 14 treesize of output 16 [2022-11-26 00:34:34,478 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:34:34,479 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 [2022-11-26 00:34:34,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:34:34,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:34:36,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:34:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583117267] [2022-11-26 00:34:36,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583117267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:36,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [283706611] [2022-11-26 00:34:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:36,407 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:34:36,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:34:36,408 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:34:36,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-26 00:34:36,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:34:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:34:36,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:37,051 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:34:37,052 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:34:37,285 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 15 treesize of output 11 [2022-11-26 00:34:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:34:37,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:34:38,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [283706611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:38,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473004144] [2022-11-26 00:34:38,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:34:38,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:38,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:38,764 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:38,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-26 00:34:38,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:34:38,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:34:39,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:34:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:34:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:34:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473004144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:40,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:34:40,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 6, 6] total 24 [2022-11-26 00:34:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101457279] [2022-11-26 00:34:40,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:40,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:34:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:34:40,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:34:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:34:40,084 INFO L87 Difference]: Start difference. First operand 562 states and 1747 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:48,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:34:48,966 INFO L93 Difference]: Finished difference Result 967 states and 2560 transitions. [2022-11-26 00:34:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:34:48,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:34:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:34:48,969 INFO L225 Difference]: With dead ends: 967 [2022-11-26 00:34:48,969 INFO L226 Difference]: Without dead ends: 967 [2022-11-26 00:34:48,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2022-11-26 00:34:48,970 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 644 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:34:48,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 0 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-26 00:34:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-11-26 00:34:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 526. [2022-11-26 00:34:48,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 515 states have (on average 3.211650485436893) internal successors, (1654), 525 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:48,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1654 transitions. [2022-11-26 00:34:48,992 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1654 transitions. Word has length 14 [2022-11-26 00:34:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:34:48,993 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1654 transitions. [2022-11-26 00:34:48,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:34:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1654 transitions. [2022-11-26 00:34:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:34:48,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:34:48,995 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1] [2022-11-26 00:34:49,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-26 00:34:49,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:49,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-26 00:34:49,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:34:49,605 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:34:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:34:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2027338390, now seen corresponding path program 1 times [2022-11-26 00:34:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:34:49,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1464775858] [2022-11-26 00:34:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:34:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:34:49,608 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:34:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-26 00:34:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:34:49,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:49,873 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 [2022-11-26 00:34:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:50,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:55,933 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:55,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:34:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1464775858] [2022-11-26 00:34:55,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1464775858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:55,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362880136] [2022-11-26 00:34:55,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:55,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:34:55,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:34:55,935 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:34:55,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-26 00:34:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:34:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:56,355 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 [2022-11-26 00:34:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:57,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [362880136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:58,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107958218] [2022-11-26 00:34:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:34:58,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:34:58,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:34:58,462 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:34:58,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-26 00:34:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:34:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:34:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:34:58,717 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 [2022-11-26 00:34:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:59,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:34:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:34:59,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107958218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:34:59,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:34:59,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 35 [2022-11-26 00:34:59,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396170471] [2022-11-26 00:34:59,794 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:34:59,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:34:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:34:59,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:34:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:34:59,798 INFO L87 Difference]: Start difference. First operand 526 states and 1654 transitions. Second operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:35:10,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:12,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:14,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:16,380 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:18,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:20,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:22,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:24,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:26,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:28,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:30,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:35:32,554 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 [] [2022-11-26 00:35:39,081 WARN L233 SmtUtils]: Spent 5.61s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:35:58,306 WARN L233 SmtUtils]: Spent 9.33s on a formula simplification. DAG size of input: 146 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:08,786 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification. DAG size of input: 138 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:16,845 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 127 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:36:55,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:36:55,153 INFO L93 Difference]: Finished difference Result 7516 states and 23973 transitions. [2022-11-26 00:36:55,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 00:36:55,157 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:36:55,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:36:55,188 INFO L225 Difference]: With dead ends: 7516 [2022-11-26 00:36:55,188 INFO L226 Difference]: Without dead ends: 7516 [2022-11-26 00:36:55,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=1276, Invalid=2264, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:36:55,190 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3242 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 113 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3242 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:36:55,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3242 Valid, 0 Invalid, 4798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 4674 Invalid, 11 Unknown, 0 Unchecked, 44.6s Time] [2022-11-26 00:36:55,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2022-11-26 00:36:55,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 582. [2022-11-26 00:36:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 571 states have (on average 3.0683012259194395) internal successors, (1752), 581 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:36:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1752 transitions. [2022-11-26 00:36:55,285 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1752 transitions. Word has length 15 [2022-11-26 00:36:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:36:55,285 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 1752 transitions. [2022-11-26 00:36:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:36:55,286 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1752 transitions. [2022-11-26 00:36:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:36:55,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:36:55,287 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:36:55,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:55,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:55,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-26 00:36:55,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:36:55,892 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-26 00:36:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:36:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash 852863179, now seen corresponding path program 4 times [2022-11-26 00:36:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:36:55,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293227005] [2022-11-26 00:36:55,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:36:55,893 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:36:55,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:36:55,895 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:36:55,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-26 00:36:56,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:36:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:36:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:36:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:36:56,376 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:36:56,376 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:36:56,464 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:36:56,464 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:36:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:36:56,769 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 21 treesize of output 21 [2022-11-26 00:36:56,798 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:36:56,799 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 [2022-11-26 00:36:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:36:57,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:37:01,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:37:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293227005] [2022-11-26 00:37:01,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293227005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:01,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [925946947] [2022-11-26 00:37:01,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:37:01,488 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:37:01,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:37:01,489 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:37:01,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-26 00:37:02,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:37:02,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:37:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:02,206 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:37:02,206 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:37:02,294 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-26 00:37:02,294 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-26 00:37:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:37:02,766 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 [2022-11-26 00:37:02,791 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:37:02,792 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 [2022-11-26 00:37:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:37:03,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:37:06,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [925946947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:06,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106150873] [2022-11-26 00:37:06,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:37:06,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:37:06,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:06,404 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:37:06,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b81c8fe-36d7-466a-9c8a-f92e257aced6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-26 00:37:06,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:37:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:37:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:37:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:37:06,728 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-26 00:37:06,729 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-26 00:37:07,352 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-26 00:37:07,352 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 16 treesize of output 22 [2022-11-26 00:37:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:08,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:37:32,601 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:41,634 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:37:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:37:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106150873] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:37:41,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:37:41,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 11, 12] total 40 [2022-11-26 00:37:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874886631] [2022-11-26 00:37:41,636 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:37:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-26 00:37:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:37:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-26 00:37:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1498, Unknown=3, NotChecked=0, Total=1722 [2022-11-26 00:37:41,637 INFO L87 Difference]: Start difference. First operand 582 states and 1752 transitions. Second operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:37:53,781 WARN L233 SmtUtils]: Spent 8.61s on a formula simplification. DAG size of input: 113 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)