./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh --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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:06:51,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:06:51,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:06:51,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:06:51,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:06:51,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:06:51,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:06:51,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:06:51,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:06:51,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:06:51,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:06:51,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:06:51,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:06:51,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:06:51,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:06:51,696 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:06:51,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:06:51,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:06:51,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:06:51,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:06:51,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:06:51,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:06:51,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:06:51,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:06:51,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:06:51,710 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:06:51,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:06:51,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:06:51,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:06:51,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:06:51,713 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:06:51,714 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:06:51,714 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:06:51,715 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:06:51,716 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:06:51,716 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:06:51,717 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:06:51,717 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:06:51,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:06:51,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:06:51,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:06:51,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:06:51,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:06:51,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:06:51,743 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:06:51,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:06:51,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:06:51,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:06:51,745 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:06:51,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:06:51,745 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:06:51,745 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:06:51,746 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:06:51,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:06:51,746 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:06:51,746 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:06:51,746 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:06:51,746 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:06:51,747 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:06:51,747 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:06:51,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:06:51,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:06:51,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:06:51,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:06:51,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:06:51,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:06:51,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:06:51,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:06:51,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:06:51,749 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:06:51,749 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:06:51,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:06:51,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:06:51,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:06:51,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:06:51,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:06:51,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:06:51,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:06:51,751 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:06:51,751 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:06:51,751 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:06:51,751 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:06:51,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:06:51,752 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:06:51,752 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_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-12-14 07:06:51,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:06:51,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:06:51,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:06:51,952 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:06:51,953 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:06:51,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-14 07:06:54,505 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:06:54,625 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:06:54,625 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-14 07:06:54,631 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/eb6e9b74a/76ee8624f19f4924b262563744801770/FLAG52f1c717a [2022-12-14 07:06:54,642 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/eb6e9b74a/76ee8624f19f4924b262563744801770 [2022-12-14 07:06:54,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:06:54,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:06:54,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:06:54,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:06:54,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:06:54,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:06:54" (1/1) ... [2022-12-14 07:06:54,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14766853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:54, skipping insertion in model container [2022-12-14 07:06:54,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:06:54" (1/1) ... [2022-12-14 07:06:54,656 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:06:54,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:06:54,794 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_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-14 07:06:54,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:06:54,809 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 07:06:54,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36e447a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:54, skipping insertion in model container [2022-12-14 07:06:54,809 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:06:54,810 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:06:54,811 INFO L158 Benchmark]: Toolchain (without parser) took 165.77ms. Allocated memory is still 138.4MB. Free memory was 95.9MB in the beginning and 86.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 07:06:54,811 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 138.4MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:06:54,812 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.04ms. Allocated memory is still 138.4MB. Free memory was 95.9MB in the beginning and 86.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 07:06:54,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 138.4MB. Free memory is still 81.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.04ms. Allocated memory is still 138.4MB. Free memory was 95.9MB in the beginning and 86.2MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh --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 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 07:06:56,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:06:56,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:06:56,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:06:56,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:06:56,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:06:56,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:06:56,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:06:56,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:06:56,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:06:56,252 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:06:56,253 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:06:56,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:06:56,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:06:56,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:06:56,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:06:56,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:06:56,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:06:56,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:06:56,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:06:56,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:06:56,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:06:56,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:06:56,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:06:56,263 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:06:56,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:06:56,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:06:56,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:06:56,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:06:56,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:06:56,265 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:06:56,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:06:56,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:06:56,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:06:56,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:06:56,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:06:56,268 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:06:56,268 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:06:56,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:06:56,269 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:06:56,270 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:06:56,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:06:56,286 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:06:56,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:06:56,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:06:56,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:06:56,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:06:56,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:06:56,287 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:06:56,287 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:06:56,288 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:06:56,288 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:06:56,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:06:56,288 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:06:56,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:06:56,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:06:56,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:06:56,290 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:06:56,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:06:56,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:06:56,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:06:56,292 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:06:56,292 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:06:56,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:06:56,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:06:56,292 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_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4755329f7559a8be1422f8772c1ed30abe185c2742a237de140cc196ec4e9010 [2022-12-14 07:06:56,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:06:56,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:06:56,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:06:56,510 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:06:56,510 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:06:56,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-14 07:06:59,072 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:06:59,236 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:06:59,236 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c [2022-12-14 07:06:59,242 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/8c7ce7b7a/f0cff349e81e441f87e984d05afc4008/FLAGaf06a9d1a [2022-12-14 07:06:59,253 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/data/8c7ce7b7a/f0cff349e81e441f87e984d05afc4008 [2022-12-14 07:06:59,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:06:59,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:06:59,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:06:59,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:06:59,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:06:59,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@480860f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59, skipping insertion in model container [2022-12-14 07:06:59,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:06:59,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:06:59,428 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_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-14 07:06:59,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:06:59,450 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:06:59,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:06:59,470 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_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-14 07:06:59,473 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:06:59,477 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:06:59,498 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_ca4a498a-8b07-446a-a722-063978b6a962/sv-benchmarks/c/weaver/unroll-cond-4.wvr.c[2808,2821] [2022-12-14 07:06:59,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:06:59,515 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:06:59,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59 WrapperNode [2022-12-14 07:06:59,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:06:59,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:06:59,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:06:59,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:06:59,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,531 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,556 INFO L138 Inliner]: procedures = 26, calls = 41, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 181 [2022-12-14 07:06:59,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:06:59,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:06:59,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:06:59,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:06:59,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,586 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:06:59,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:06:59,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:06:59,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:06:59,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (1/1) ... [2022-12-14 07:06:59,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:06:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:06:59,618 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:06:59,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:06:59,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 07:06:59,646 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 07:06:59,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:06:59,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:06:59,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:06:59,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:06:59,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:06:59,648 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:06:59,735 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:06:59,736 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:07:00,227 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:07:00,234 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:07:00,234 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:07:00,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:07:00 BoogieIcfgContainer [2022-12-14 07:07:00,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:07:00,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:07:00,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:07:00,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:07:00,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:06:59" (1/3) ... [2022-12-14 07:07:00,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b42680b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:07:00, skipping insertion in model container [2022-12-14 07:07:00,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:06:59" (2/3) ... [2022-12-14 07:07:00,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b42680b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:07:00, skipping insertion in model container [2022-12-14 07:07:00,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:07:00" (3/3) ... [2022-12-14 07:07:00,241 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-4.wvr.c [2022-12-14 07:07:00,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:07:00,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 07:07:00,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:07:00,330 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 07:07:00,361 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:07:00,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 253 places, 267 transitions, 550 flow [2022-12-14 07:07:00,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 253 places, 267 transitions, 550 flow [2022-12-14 07:07:00,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 267 transitions, 550 flow [2022-12-14 07:07:00,439 INFO L130 PetriNetUnfolder]: 21/265 cut-off events. [2022-12-14 07:07:00,439 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:07:00,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 265 events. 21/265 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 559 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-14 07:07:00,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 8508 [2022-12-14 07:07:46,034 INFO L134 LiptonReduction]: Checked pairs total: 8042 [2022-12-14 07:07:46,034 INFO L136 LiptonReduction]: Total number of compositions: 324 [2022-12-14 07:07:46,039 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 47 transitions, 110 flow [2022-12-14 07:07:46,064 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 262 states have (on average 4.282442748091603) internal successors, (1122), 437 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:46,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:07:46,081 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;@131542d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:07:46,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-14 07:07:46,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 262 states have (on average 4.282442748091603) internal successors, (1122), 437 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:07:46,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:46,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:07:46,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 35703, now seen corresponding path program 1 times [2022-12-14 07:07:46,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:46,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331103872] [2022-12-14 07:07:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:46,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:46,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:46,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:46,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 07:07:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:46,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:07:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:46,230 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:07:46,231 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 [2022-12-14 07:07:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:46,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:46,247 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:46,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331103872] [2022-12-14 07:07:46,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331103872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:46,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:46,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:46,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501619698] [2022-12-14 07:07:46,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:46,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:46,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:46,271 INFO L87 Difference]: Start difference. First operand has 438 states, 262 states have (on average 4.282442748091603) internal successors, (1122), 437 states have internal predecessors, (1122), 0 states have call successors, (0), 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) [2022-12-14 07:07:46,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:46,565 INFO L93 Difference]: Finished difference Result 364 states and 931 transitions. [2022-12-14 07:07:46,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:46,567 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 [2022-12-14 07:07:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:46,575 INFO L225 Difference]: With dead ends: 364 [2022-12-14 07:07:46,575 INFO L226 Difference]: Without dead ends: 364 [2022-12-14 07:07:46,576 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 [2022-12-14 07:07:46,578 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:46,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-14 07:07:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-12-14 07:07:46,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 223 states have (on average 4.174887892376682) internal successors, (931), 363 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 931 transitions. [2022-12-14 07:07:46,618 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 931 transitions. Word has length 2 [2022-12-14 07:07:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:46,618 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 931 transitions. [2022-12-14 07:07:46,618 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) [2022-12-14 07:07:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 931 transitions. [2022-12-14 07:07:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:07:46,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:46,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:07:46,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:46,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:46,823 INFO L85 PathProgramCache]: Analyzing trace with hash 35928, now seen corresponding path program 1 times [2022-12-14 07:07:46,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:46,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1967115924] [2022-12-14 07:07:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:46,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:46,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:46,829 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:46,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 07:07:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:07:46,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:46,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:46,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:46,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1967115924] [2022-12-14 07:07:46,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1967115924] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:46,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:46,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79241250] [2022-12-14 07:07:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:46,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:46,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:46,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:46,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:46,915 INFO L87 Difference]: Start difference. First operand 364 states and 931 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) [2022-12-14 07:07:47,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:47,233 INFO L93 Difference]: Finished difference Result 366 states and 933 transitions. [2022-12-14 07:07:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:47,234 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 [2022-12-14 07:07:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:47,236 INFO L225 Difference]: With dead ends: 366 [2022-12-14 07:07:47,236 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 07:07:47,236 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 [2022-12-14 07:07:47,237 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:47,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 07:07:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 365. [2022-12-14 07:07:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 224 states have (on average 4.165178571428571) internal successors, (933), 364 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 933 transitions. [2022-12-14 07:07:47,249 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 933 transitions. Word has length 2 [2022-12-14 07:07:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:47,249 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 933 transitions. [2022-12-14 07:07:47,250 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) [2022-12-14 07:07:47,250 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 933 transitions. [2022-12-14 07:07:47,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:07:47,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:47,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:07:47,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 07:07:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:47,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash 35704, now seen corresponding path program 1 times [2022-12-14 07:07:47,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:47,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976250636] [2022-12-14 07:07:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:47,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:47,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:47,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:47,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 07:07:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:07:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:47,651 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:47,652 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 [2022-12-14 07:07:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:47,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:47,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976250636] [2022-12-14 07:07:47,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976250636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:47,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:47,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713073151] [2022-12-14 07:07:47,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:47,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:47,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:47,672 INFO L87 Difference]: Start difference. First operand 365 states and 933 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) [2022-12-14 07:07:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:48,022 INFO L93 Difference]: Finished difference Result 365 states and 932 transitions. [2022-12-14 07:07:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:48,023 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 [2022-12-14 07:07:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:48,025 INFO L225 Difference]: With dead ends: 365 [2022-12-14 07:07:48,025 INFO L226 Difference]: Without dead ends: 365 [2022-12-14 07:07:48,025 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 [2022-12-14 07:07:48,026 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:48,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-12-14 07:07:48,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-12-14 07:07:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 224 states have (on average 4.160714285714286) internal successors, (932), 364 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 932 transitions. [2022-12-14 07:07:48,040 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 932 transitions. Word has length 2 [2022-12-14 07:07:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 932 transitions. [2022-12-14 07:07:48,040 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) [2022-12-14 07:07:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 932 transitions. [2022-12-14 07:07:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:07:48,040 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:48,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:07:48,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 07:07:48,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:48,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:48,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:48,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1114480, now seen corresponding path program 1 times [2022-12-14 07:07:48,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:48,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141962088] [2022-12-14 07:07:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:48,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:48,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:48,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 07:07:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:48,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:07:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:48,379 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-12-14 07:07:48,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-12-14 07:07:48,391 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 [2022-12-14 07:07:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:07:48,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:48,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:48,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141962088] [2022-12-14 07:07:48,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141962088] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:48,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:48,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:48,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678044006] [2022-12-14 07:07:48,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:48,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:48,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:48,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:48,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:48,487 INFO L87 Difference]: Start difference. First operand 365 states and 932 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) [2022-12-14 07:07:48,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:48,752 INFO L93 Difference]: Finished difference Result 294 states and 721 transitions. [2022-12-14 07:07:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:48,753 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 [2022-12-14 07:07:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:48,756 INFO L225 Difference]: With dead ends: 294 [2022-12-14 07:07:48,756 INFO L226 Difference]: Without dead ends: 294 [2022-12-14 07:07:48,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:48,757 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 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 [2022-12-14 07:07:48,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-14 07:07:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-12-14 07:07:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 190 states have (on average 3.794736842105263) internal successors, (721), 293 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 721 transitions. [2022-12-14 07:07:48,764 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 721 transitions. Word has length 3 [2022-12-14 07:07:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:48,764 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 721 transitions. [2022-12-14 07:07:48,764 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) [2022-12-14 07:07:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 721 transitions. [2022-12-14 07:07:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:07:48,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:48,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:07:48,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 07:07:48,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:48,965 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1114256, now seen corresponding path program 1 times [2022-12-14 07:07:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353099743] [2022-12-14 07:07:48,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:48,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:48,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:48,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 07:07:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:07:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:49,132 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:49,132 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 [2022-12-14 07:07:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353099743] [2022-12-14 07:07:49,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353099743] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733528261] [2022-12-14 07:07:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:49,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:07:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:07:49,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:07:49,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 07:07:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:49,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:07:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:49,505 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:49,506 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 [2022-12-14 07:07:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733528261] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:49,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175023565] [2022-12-14 07:07:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:49,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:49,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:07:49,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:07:49,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:07:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:49,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:07:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:49,701 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:49,701 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 [2022-12-14 07:07:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:49,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175023565] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:49,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:07:49,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 07:07:49,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46418096] [2022-12-14 07:07:49,865 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:07:49,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:07:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:07:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:07:49,866 INFO L87 Difference]: Start difference. First operand 294 states and 721 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) [2022-12-14 07:07:51,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:51,657 INFO L93 Difference]: Finished difference Result 877 states and 2160 transitions. [2022-12-14 07:07:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:07:51,658 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 [2022-12-14 07:07:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:51,661 INFO L225 Difference]: With dead ends: 877 [2022-12-14 07:07:51,661 INFO L226 Difference]: Without dead ends: 877 [2022-12-14 07:07:51,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:07:51,662 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 236 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:51,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 8 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:07:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2022-12-14 07:07:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 297. [2022-12-14 07:07:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 193 states have (on average 3.7823834196891193) internal successors, (730), 296 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 730 transitions. [2022-12-14 07:07:51,671 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 730 transitions. Word has length 3 [2022-12-14 07:07:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:51,671 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 730 transitions. [2022-12-14 07:07:51,671 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) [2022-12-14 07:07:51,671 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 730 transitions. [2022-12-14 07:07:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:07:51,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:51,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:07:51,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:51,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:52,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 07:07:52,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,274 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1114481, now seen corresponding path program 1 times [2022-12-14 07:07:52,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64836414] [2022-12-14 07:07:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:52,277 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:52,280 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:52,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 07:07:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:07:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:52,390 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 07:07:52,390 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 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-14 07:07:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:07:52,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:52,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:52,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64836414] [2022-12-14 07:07:52,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64836414] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:52,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:52,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429734404] [2022-12-14 07:07:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:52,422 INFO L87 Difference]: Start difference. First operand 297 states and 730 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) [2022-12-14 07:07:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:52,676 INFO L93 Difference]: Finished difference Result 226 states and 516 transitions. [2022-12-14 07:07:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:52,676 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 [2022-12-14 07:07:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:52,677 INFO L225 Difference]: With dead ends: 226 [2022-12-14 07:07:52,677 INFO L226 Difference]: Without dead ends: 226 [2022-12-14 07:07:52,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:52,678 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:52,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 2 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-14 07:07:52,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-12-14 07:07:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 159 states have (on average 3.2452830188679247) internal successors, (516), 225 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 516 transitions. [2022-12-14 07:07:52,682 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 516 transitions. Word has length 3 [2022-12-14 07:07:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:52,682 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 516 transitions. [2022-12-14 07:07:52,682 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) [2022-12-14 07:07:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 516 transitions. [2022-12-14 07:07:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:07:52,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:52,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:07:52,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 07:07:52,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,885 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:52,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1071041956, now seen corresponding path program 1 times [2022-12-14 07:07:52,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:52,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710761180] [2022-12-14 07:07:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:52,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:52,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:52,890 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:52,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 07:07:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:52,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:07:52,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:53,023 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:53,023 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 [2022-12-14 07:07:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:53,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:53,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710761180] [2022-12-14 07:07:53,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710761180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:53,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1090301754] [2022-12-14 07:07:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:53,354 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:07:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:07:53,355 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:07:53,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 07:07:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:07:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:53,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:07:53,489 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 07:07:53,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-14 07:07:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:07:53,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:53,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1090301754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:53,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:07:53,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 07:07:53,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9755120] [2022-12-14 07:07:53,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:53,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:53,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:53,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:53,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:07:53,550 INFO L87 Difference]: Start difference. First operand 226 states and 516 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) [2022-12-14 07:07:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:53,784 INFO L93 Difference]: Finished difference Result 207 states and 478 transitions. [2022-12-14 07:07:53,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:53,784 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 [2022-12-14 07:07:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:53,785 INFO L225 Difference]: With dead ends: 207 [2022-12-14 07:07:53,785 INFO L226 Difference]: Without dead ends: 207 [2022-12-14 07:07:53,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:07:53,786 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:53,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:07:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-12-14 07:07:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-12-14 07:07:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 155 states have (on average 3.0838709677419356) internal successors, (478), 206 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) [2022-12-14 07:07:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 478 transitions. [2022-12-14 07:07:53,790 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 478 transitions. Word has length 5 [2022-12-14 07:07:53,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:53,790 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 478 transitions. [2022-12-14 07:07:53,790 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) [2022-12-14 07:07:53,790 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 478 transitions. [2022-12-14 07:07:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:07:53,791 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:53,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:07:53,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 07:07:53,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-12-14 07:07:54,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:07:54,193 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:54,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1071041954, now seen corresponding path program 1 times [2022-12-14 07:07:54,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:54,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827085205] [2022-12-14 07:07:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:54,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:54,198 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 07:07:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:54,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:07:54,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:54,318 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2022-12-14 07:07:54,319 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 29 [2022-12-14 07:07:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:07:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:54,333 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827085205] [2022-12-14 07:07:54,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827085205] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:54,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:07:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283904906] [2022-12-14 07:07:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:07:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:07:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:54,335 INFO L87 Difference]: Start difference. First operand 207 states and 478 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) [2022-12-14 07:07:54,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:54,565 INFO L93 Difference]: Finished difference Result 188 states and 440 transitions. [2022-12-14 07:07:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:07:54,565 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 [2022-12-14 07:07:54,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:54,566 INFO L225 Difference]: With dead ends: 188 [2022-12-14 07:07:54,566 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 07:07:54,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:07:54,566 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 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 [2022-12-14 07:07:54,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:07:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 07:07:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-12-14 07:07:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 151 states have (on average 2.9139072847682117) internal successors, (440), 187 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:54,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 440 transitions. [2022-12-14 07:07:54,570 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 440 transitions. Word has length 5 [2022-12-14 07:07:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:54,570 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 440 transitions. [2022-12-14 07:07:54,570 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) [2022-12-14 07:07:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 440 transitions. [2022-12-14 07:07:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:07:54,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:54,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:07:54,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 07:07:54,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:54,772 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1157447774, now seen corresponding path program 1 times [2022-12-14 07:07:54,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984650574] [2022-12-14 07:07:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:54,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:54,777 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:54,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 07:07:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:07:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:55,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:55,158 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 [2022-12-14 07:07:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:55,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984650574] [2022-12-14 07:07:55,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984650574] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:55,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982707304] [2022-12-14 07:07:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:55,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:07:55,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:07:55,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:07:55,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 07:07:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:55,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:07:55,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:55,385 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:55,385 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 [2022-12-14 07:07:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:55,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982707304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576486661] [2022-12-14 07:07:55,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:07:55,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:07:55,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:07:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:55,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:07:55,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:55,968 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:55,968 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 [2022-12-14 07:07:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:56,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:07:56,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:56,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576486661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:07:56,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:07:56,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 07:07:56,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212982929] [2022-12-14 07:07:56,148 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:07:56,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:07:56,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:56,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:07:56,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:07:56,149 INFO L87 Difference]: Start difference. First operand 188 states and 440 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:58,133 INFO L93 Difference]: Finished difference Result 590 states and 1382 transitions. [2022-12-14 07:07:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:07:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-12-14 07:07:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:58,137 INFO L225 Difference]: With dead ends: 590 [2022-12-14 07:07:58,137 INFO L226 Difference]: Without dead ends: 590 [2022-12-14 07:07:58,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:07:58,137 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 365 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:58,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 16 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 07:07:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-12-14 07:07:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 247. [2022-12-14 07:07:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 210 states have (on average 3.519047619047619) internal successors, (739), 246 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 739 transitions. [2022-12-14 07:07:58,143 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 739 transitions. Word has length 6 [2022-12-14 07:07:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:58,144 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 739 transitions. [2022-12-14 07:07:58,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 739 transitions. [2022-12-14 07:07:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:07:58,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:58,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:07:58,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 07:07:58,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 07:07:58,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 07:07:58,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:07:58,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1157447773, now seen corresponding path program 1 times [2022-12-14 07:07:58,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:58,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107829113] [2022-12-14 07:07:58,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:07:58,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:58,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:58,750 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:58,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 07:07:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:07:58,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:07:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:58,860 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:07:58,860 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 [2022-12-14 07:07:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:07:58,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:07:58,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:07:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107829113] [2022-12-14 07:07:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107829113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:07:58,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:07:58,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:07:58,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140927712] [2022-12-14 07:07:58,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:07:58,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:07:58,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:07:58,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:07:58,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:07:58,880 INFO L87 Difference]: Start difference. First operand 247 states and 739 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-12-14 07:07:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:07:59,142 INFO L93 Difference]: Finished difference Result 163 states and 445 transitions. [2022-12-14 07:07:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:07:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2022-12-14 07:07:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:07:59,144 INFO L225 Difference]: With dead ends: 163 [2022-12-14 07:07:59,144 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 07:07:59,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:07:59,145 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:07:59,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:07:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 07:07:59,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-12-14 07:07:59,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 3.047945205479452) internal successors, (445), 162 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:07:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 445 transitions. [2022-12-14 07:07:59,150 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 445 transitions. Word has length 6 [2022-12-14 07:07:59,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:07:59,150 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 445 transitions. [2022-12-14 07:07:59,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2022-12-14 07:07:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 445 transitions. [2022-12-14 07:07:59,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:07:59,150 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:07:59,150 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 07:07:59,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 07:07:59,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:59,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:07:59,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:07:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1157557896, now seen corresponding path program 2 times [2022-12-14 07:07:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:07:59,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012201189] [2022-12-14 07:07:59,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:07:59,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:07:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:07:59,354 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:07:59,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 07:07:59,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:07:59,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:07:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:07:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:07:59,503 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:07:59,504 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 [2022-12-14 07:07:59,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:07:59,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:00,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012201189] [2022-12-14 07:08:00,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012201189] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:00,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081923079] [2022-12-14 07:08:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:08:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:08:00,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:08:00,279 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:08:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 07:08:00,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:08:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:00,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:08:00,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:00,472 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:00,472 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 [2022-12-14 07:08:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:00,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:00,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081923079] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:00,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868804742] [2022-12-14 07:08:00,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:08:00,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:00,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:00,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:08:00,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:08:00,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:00,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:08:00,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:00,948 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:00,949 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 [2022-12-14 07:08:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:01,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:01,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868804742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:01,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:08:01,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-12-14 07:08:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463521002] [2022-12-14 07:08:01,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:01,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 07:08:01,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 07:08:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:08:01,150 INFO L87 Difference]: Start difference. First operand 163 states and 445 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:06,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:06,127 INFO L93 Difference]: Finished difference Result 1212 states and 3054 transitions. [2022-12-14 07:08:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:08:06,129 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2022-12-14 07:08:06,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:06,132 INFO L225 Difference]: With dead ends: 1212 [2022-12-14 07:08:06,132 INFO L226 Difference]: Without dead ends: 1212 [2022-12-14 07:08:06,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:08:06,133 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 529 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:06,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 62 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-14 07:08:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-12-14 07:08:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 169. [2022-12-14 07:08:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 152 states have (on average 3.0065789473684212) internal successors, (457), 168 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 457 transitions. [2022-12-14 07:08:06,141 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 457 transitions. Word has length 6 [2022-12-14 07:08:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:06,141 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 457 transitions. [2022-12-14 07:08:06,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 457 transitions. [2022-12-14 07:08:06,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:08:06,142 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:06,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:06,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 07:08:06,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 07:08:06,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 07:08:06,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:06,745 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1521141291, now seen corresponding path program 1 times [2022-12-14 07:08:06,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:06,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843952121] [2022-12-14 07:08:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:06,747 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:06,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:06,750 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:06,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 07:08:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:06,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:08:06,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:06,897 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:06,897 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 [2022-12-14 07:08:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:06,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:07,614 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:07,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843952121] [2022-12-14 07:08:07,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843952121] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:07,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1504706581] [2022-12-14 07:08:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:08:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:08:07,615 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:08:07,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 07:08:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:08:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:07,777 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:07,777 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 [2022-12-14 07:08:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:07,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:08,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1504706581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:08,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406235245] [2022-12-14 07:08:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:08,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:08,141 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:08,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 07:08:08,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:08:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:08,270 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:08,270 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 [2022-12-14 07:08:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:08,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:08,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406235245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:08,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:08:08,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-12-14 07:08:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067039010] [2022-12-14 07:08:08,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:08,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:08:08,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:08:08,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:08:08,626 INFO L87 Difference]: Start difference. First operand 169 states and 457 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2022-12-14 07:08:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:12,513 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2022-12-14 07:08:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:08:12,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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 7 [2022-12-14 07:08:12,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:12,515 INFO L225 Difference]: With dead ends: 238 [2022-12-14 07:08:12,516 INFO L226 Difference]: Without dead ends: 238 [2022-12-14 07:08:12,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:08:12,516 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 90 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:12,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 16 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-12-14 07:08:12,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-14 07:08:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 173. [2022-12-14 07:08:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 156 states have (on average 2.7243589743589745) internal successors, (425), 172 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 425 transitions. [2022-12-14 07:08:12,521 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 425 transitions. Word has length 7 [2022-12-14 07:08:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:12,521 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 425 transitions. [2022-12-14 07:08:12,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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) [2022-12-14 07:08:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 425 transitions. [2022-12-14 07:08:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:08:12,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:12,522 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:12,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-12-14 07:08:12,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 07:08:12,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 07:08:13,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:13,125 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1451398845, now seen corresponding path program 2 times [2022-12-14 07:08:13,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:13,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958578890] [2022-12-14 07:08:13,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:08:13,128 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:13,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:13,129 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:13,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 07:08:13,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:08:13,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:13,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:08:13,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:13,287 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:13,287 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 [2022-12-14 07:08:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:08:13,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:13,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958578890] [2022-12-14 07:08:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958578890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:13,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:13,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:08:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38726540] [2022-12-14 07:08:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:08:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:08:13,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:08:13,378 INFO L87 Difference]: Start difference. First operand 173 states and 425 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) [2022-12-14 07:08:13,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:13,680 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2022-12-14 07:08:13,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:08:13,681 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 [2022-12-14 07:08:13,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:13,681 INFO L225 Difference]: With dead ends: 81 [2022-12-14 07:08:13,682 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 07:08:13,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:13,682 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:13,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:08:13,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 07:08:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 46. [2022-12-14 07:08:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:13,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-12-14 07:08:13,685 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 10 [2022-12-14 07:08:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:13,685 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-12-14 07:08:13,685 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) [2022-12-14 07:08:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-12-14 07:08:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:08:13,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:13,686 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 07:08:13,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 07:08:13,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:13,887 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:13,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:13,888 INFO L85 PathProgramCache]: Analyzing trace with hash -49661320, now seen corresponding path program 3 times [2022-12-14 07:08:13,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:13,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1017129769] [2022-12-14 07:08:13,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:08:13,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:13,891 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 07:08:14,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:08:14,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:14,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:08:14,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:14,141 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:14,141 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 [2022-12-14 07:08:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:14,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:17,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1017129769] [2022-12-14 07:08:17,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1017129769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:17,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028434494] [2022-12-14 07:08:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:08:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:08:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:08:17,166 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:08:17,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 07:08:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:08:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:17,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:08:17,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:17,759 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:17,759 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 [2022-12-14 07:08:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:21,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028434494] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144752675] [2022-12-14 07:08:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:08:21,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:08:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:08:21,059 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:08:21,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 07:08:23,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:08:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:08:23,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:23,501 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:08:23,501 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 [2022-12-14 07:08:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:23,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:08:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:08:24,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144752675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:08:24,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:08:24,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-12-14 07:08:24,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918258330] [2022-12-14 07:08:24,064 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:08:24,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 07:08:24,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:24,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 07:08:24,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:08:24,065 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:41,601 INFO L93 Difference]: Finished difference Result 718 states and 1559 transitions. [2022-12-14 07:08:41,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:08:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2022-12-14 07:08:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:41,605 INFO L225 Difference]: With dead ends: 718 [2022-12-14 07:08:41,605 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 07:08:41,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=940, Invalid=1922, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 07:08:41,606 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2145 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2417 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2145 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:41,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2145 Valid, 338 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2417 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-12-14 07:08:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 07:08:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 58. [2022-12-14 07:08:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.125) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2022-12-14 07:08:41,612 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 12 [2022-12-14 07:08:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:41,612 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2022-12-14 07:08:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:41,613 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2022-12-14 07:08:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:41,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:41,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:41,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 07:08:41,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-12-14 07:08:42,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Forceful destruction successful, exit code 0 [2022-12-14 07:08:42,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:42,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:42,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:42,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1413405998, now seen corresponding path program 1 times [2022-12-14 07:08:42,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:42,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278143771] [2022-12-14 07:08:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:42,219 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:42,220 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:42,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 07:08:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:42,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:42,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:42,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:42,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278143771] [2022-12-14 07:08:42,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278143771] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:42,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:42,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981423666] [2022-12-14 07:08:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:42,359 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:42,566 INFO L93 Difference]: Finished difference Result 78 states and 162 transitions. [2022-12-14 07:08:42,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:42,567 INFO L225 Difference]: With dead ends: 78 [2022-12-14 07:08:42,567 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 07:08:42,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:42,568 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:42,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:08:42,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 07:08:42,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-12-14 07:08:42,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 2.129032258064516) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2022-12-14 07:08:42,570 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 15 [2022-12-14 07:08:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:42,570 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2022-12-14 07:08:42,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2022-12-14 07:08:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:42,571 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:42,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:42,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:08:42,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:42,772 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1217925024, now seen corresponding path program 2 times [2022-12-14 07:08:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569847728] [2022-12-14 07:08:42,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:08:42,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:42,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:42,778 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:42,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 07:08:42,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:08:42,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:42,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:42,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:42,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:42,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569847728] [2022-12-14 07:08:42,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569847728] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:42,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:42,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586637175] [2022-12-14 07:08:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:42,951 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:43,159 INFO L93 Difference]: Finished difference Result 84 states and 180 transitions. [2022-12-14 07:08:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:43,160 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:43,160 INFO L225 Difference]: With dead ends: 84 [2022-12-14 07:08:43,160 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 07:08:43,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:43,161 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:43,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:08:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 07:08:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2022-12-14 07:08:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 64 states have (on average 2.203125) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2022-12-14 07:08:43,163 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 15 [2022-12-14 07:08:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:43,163 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2022-12-14 07:08:43,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2022-12-14 07:08:43,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:43,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:43,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:43,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:08:43,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:43,365 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:43,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:43,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1803019090, now seen corresponding path program 3 times [2022-12-14 07:08:43,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:43,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186905453] [2022-12-14 07:08:43,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:08:43,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:43,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:43,368 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 07:08:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 07:08:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:43,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:43,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:43,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186905453] [2022-12-14 07:08:43,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186905453] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:43,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:43,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:43,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457507272] [2022-12-14 07:08:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:43,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:43,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:43,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:43,512 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:43,745 INFO L93 Difference]: Finished difference Result 76 states and 168 transitions. [2022-12-14 07:08:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:43,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:43,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:43,746 INFO L225 Difference]: With dead ends: 76 [2022-12-14 07:08:43,746 INFO L226 Difference]: Without dead ends: 76 [2022-12-14 07:08:43,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:08:43,746 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:43,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:08:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-12-14 07:08:43,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-12-14 07:08:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.176470588235294) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-12-14 07:08:43,748 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-12-14 07:08:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:43,748 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-12-14 07:08:43,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-12-14 07:08:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:43,748 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:43,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:43,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 07:08:43,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:43,950 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:43,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -917956978, now seen corresponding path program 4 times [2022-12-14 07:08:43,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:43,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880947016] [2022-12-14 07:08:43,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:08:43,953 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:43,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:43,956 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:43,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 07:08:44,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:08:44,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:44,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:44,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:44,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880947016] [2022-12-14 07:08:44,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880947016] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:44,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:44,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:44,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615042354] [2022-12-14 07:08:44,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:44,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:44,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:44,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:44,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:44,169 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:44,503 INFO L93 Difference]: Finished difference Result 108 states and 228 transitions. [2022-12-14 07:08:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:44,504 INFO L225 Difference]: With dead ends: 108 [2022-12-14 07:08:44,504 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 07:08:44,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:44,505 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:44,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:08:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 07:08:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 76. [2022-12-14 07:08:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 170 transitions. [2022-12-14 07:08:44,508 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 170 transitions. Word has length 15 [2022-12-14 07:08:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:44,508 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 170 transitions. [2022-12-14 07:08:44,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:44,508 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 170 transitions. [2022-12-14 07:08:44,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:44,508 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:44,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:44,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:08:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:44,710 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash -332862912, now seen corresponding path program 5 times [2022-12-14 07:08:44,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:44,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76600533] [2022-12-14 07:08:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:08:44,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:44,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:44,715 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:44,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Waiting until timeout for monitored process [2022-12-14 07:08:44,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:08:44,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:44,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:44,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:44,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:44,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:44,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76600533] [2022-12-14 07:08:44,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76600533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:44,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:44,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426336724] [2022-12-14 07:08:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:44,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:44,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:44,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:44,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:44,872 INFO L87 Difference]: Start difference. First operand 76 states and 170 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:45,213 INFO L93 Difference]: Finished difference Result 104 states and 227 transitions. [2022-12-14 07:08:45,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:45,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:45,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:45,214 INFO L225 Difference]: With dead ends: 104 [2022-12-14 07:08:45,214 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:08:45,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:08:45,215 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:45,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 5 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:08:45,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:08:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2022-12-14 07:08:45,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 2.236111111111111) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2022-12-14 07:08:45,217 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 15 [2022-12-14 07:08:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:45,217 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2022-12-14 07:08:45,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2022-12-14 07:08:45,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:08:45,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:45,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:45,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 07:08:45,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:45,419 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 489143566, now seen corresponding path program 6 times [2022-12-14 07:08:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:45,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146714467] [2022-12-14 07:08:45,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:08:45,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:45,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:45,423 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:45,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 07:08:45,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-14 07:08:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:08:45,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:08:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:08:45,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:08:45,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:08:45,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146714467] [2022-12-14 07:08:45,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146714467] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:08:45,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:08:45,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:08:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649319957] [2022-12-14 07:08:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:08:45,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:08:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:08:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:08:45,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:08:45,571 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:08:45,896 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2022-12-14 07:08:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:08:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-12-14 07:08:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:08:45,897 INFO L225 Difference]: With dead ends: 98 [2022-12-14 07:08:45,897 INFO L226 Difference]: Without dead ends: 98 [2022-12-14 07:08:45,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:08:45,898 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:08:45,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 8 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 07:08:45,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-14 07:08:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-12-14 07:08:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-12-14 07:08:45,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-12-14 07:08:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:08:45,900 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-12-14 07:08:45,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:08:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-12-14 07:08:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:08:45,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:08:45,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:08:45,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-12-14 07:08:46,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:46,102 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 07:08:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:08:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1647732467, now seen corresponding path program 1 times [2022-12-14 07:08:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:08:46,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318132424] [2022-12-14 07:08:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:08:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:08:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:08:46,107 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 07:08:46,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca4a498a-8b07-446a-a722-063978b6a962/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 07:08:46,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:08:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:08:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:08:46,501 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 411 treesize of output 405 [2022-12-14 07:08:46,507 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 405 treesize of output 399 [2022-12-14 07:09:07,772 INFO L321 Elim1Store]: treesize reduction 516, result has 2.5 percent of original size [2022-12-14 07:09:07,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1130 treesize of output 201 [2022-12-14 07:09:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:09:09,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:09:16,954 INFO L321 Elim1Store]: treesize reduction 1008, result has 22.3 percent of original size [2022-12-14 07:09:16,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 529 treesize of output 677 [2022-12-14 07:09:16,981 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 380 treesize of output 374 [2022-12-14 07:09:17,006 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 374 treesize of output 368