./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.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_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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_919b98d1-47f5-4954-8186-65a6e8af42a8/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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- 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 07:47:06,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:47:06,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:47:06,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:47:06,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:47:06,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:47:06,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:47:06,805 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:47:06,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:47:06,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:47:06,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:47:06,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:47:06,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:47:06,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:47:06,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:47:06,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:47:06,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:47:06,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:47:06,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:47:06,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:47:06,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:47:06,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:47:06,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:47:06,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:47:06,820 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:47:06,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:47:06,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:47:06,821 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:47:06,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:47:06,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:47:06,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:47:06,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:47:06,824 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:47:06,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:47:06,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:47:06,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:47:06,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:47:06,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:47:06,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:47:06,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:47:06,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:47:06,828 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:47:06,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:47:06,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:47:06,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:47:06,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:47:06,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:47:06,843 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:47:06,843 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:47:06,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:47:06,844 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:47:06,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:47:06,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:47:06,849 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:47:06,849 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:47:06,849 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:47:06,849 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:47:06,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:47:06,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:47:06,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:47:06,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:47:06,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:47:06,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:47:06,851 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:47:06,851 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:47:06,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:47:06,852 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:47:06,853 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:47:06,853 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:47:06,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:47:06,853 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:47:06,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:06,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:47:06,854 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:47:06,854 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:47:06,854 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:47:06,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:47:06,855 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:47:06,855 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_919b98d1-47f5-4954-8186-65a6e8af42a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-12-14 07:47:07,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:47:07,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:47:07,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:47:07,063 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:47:07,063 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:47:07,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-12-14 07:47:09,571 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:47:09,730 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:47:09,731 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-12-14 07:47:09,736 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/b55554ee3/0e38dde413f049fa9cac815ef6fab563/FLAGa3c8b68f6 [2022-12-14 07:47:09,746 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/b55554ee3/0e38dde413f049fa9cac815ef6fab563 [2022-12-14 07:47:09,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:47:09,749 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:47:09,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:09,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:47:09,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:47:09,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:09" (1/1) ... [2022-12-14 07:47:09,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@320da5fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:09, skipping insertion in model container [2022-12-14 07:47:09,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:09" (1/1) ... [2022-12-14 07:47:09,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:47:09,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:47:09,877 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:09,879 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:09,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:09,882 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:09,887 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_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-12-14 07:47:09,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:09,901 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 07:47:09,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@535e46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:09, skipping insertion in model container [2022-12-14 07:47:09,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:09,902 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:47:09,903 INFO L158 Benchmark]: Toolchain (without parser) took 153.62ms. Allocated memory is still 153.1MB. Free memory was 121.9MB in the beginning and 112.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:47:09,904 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 153.1MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:47:09,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.04ms. Allocated memory is still 153.1MB. Free memory was 121.9MB in the beginning and 112.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 07:47:09,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 153.1MB. Free memory is still 123.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.04ms. Allocated memory is still 153.1MB. Free memory was 121.9MB in the beginning and 112.3MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: 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_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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_919b98d1-47f5-4954-8186-65a6e8af42a8/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 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- 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 07:47:11,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:47:11,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:47:11,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:47:11,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:47:11,280 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:47:11,281 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:47:11,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:47:11,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:47:11,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:47:11,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:47:11,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:47:11,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:47:11,286 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:47:11,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:47:11,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:47:11,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:47:11,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:47:11,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:47:11,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:47:11,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:47:11,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:47:11,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:47:11,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:47:11,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:47:11,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:47:11,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:47:11,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:47:11,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:47:11,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:47:11,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:47:11,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:47:11,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:47:11,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:47:11,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:47:11,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:47:11,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:47:11,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:47:11,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:47:11,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:47:11,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:47:11,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:47:11,326 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:47:11,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:47:11,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:47:11,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:47:11,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:47:11,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:47:11,328 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:47:11,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:47:11,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:47:11,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:47:11,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:47:11,329 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:47:11,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:47:11,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:47:11,330 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:47:11,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:47:11,331 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:47:11,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:47:11,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:47:11,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:47:11,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:11,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:47:11,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:47:11,332 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:47:11,332 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:11,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:47:11,332 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:47:11,332 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_919b98d1-47f5-4954-8186-65a6e8af42a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-12-14 07:47:11,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:47:11,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:47:11,595 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:47:11,596 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:47:11,596 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:47:11,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-12-14 07:47:14,104 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:47:14,273 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:47:14,274 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-12-14 07:47:14,280 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/723c0f271/8ea40c7432f742b19edf19b630685349/FLAGad3d2863c [2022-12-14 07:47:14,663 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/data/723c0f271/8ea40c7432f742b19edf19b630685349 [2022-12-14 07:47:14,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:47:14,666 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:47:14,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:14,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:47:14,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:47:14,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f36f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14, skipping insertion in model container [2022-12-14 07:47:14,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:47:14,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:47:14,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,832 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,842 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_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-12-14 07:47:14,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:14,858 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:47:14,861 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:47:14,865 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,866 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,867 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,868 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,871 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_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-12-14 07:47:14,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:14,878 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:47:14,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,889 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:47:14,891 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:47:14,894 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_919b98d1-47f5-4954-8186-65a6e8af42a8/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-12-14 07:47:14,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:47:14,911 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:47:14,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14 WrapperNode [2022-12-14 07:47:14,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:47:14,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:14,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:47:14,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:47:14,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,959 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2022-12-14 07:47:14,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:47:14,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:47:14,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:47:14,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:47:14,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,985 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:47:14,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:47:14,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:47:14,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:47:14,990 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (1/1) ... [2022-12-14 07:47:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:47:15,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:15,017 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:47:15,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:47:15,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:47:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 07:47:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:47:15,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:47:15,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:47:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:47:15,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:47:15,048 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 07:47:15,126 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:47:15,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:47:15,422 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:47:15,519 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:47:15,519 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:47:15,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:15 BoogieIcfgContainer [2022-12-14 07:47:15,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:47:15,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:47:15,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:47:15,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:47:15,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:47:14" (1/3) ... [2022-12-14 07:47:15,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1a83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:15, skipping insertion in model container [2022-12-14 07:47:15,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:47:14" (2/3) ... [2022-12-14 07:47:15,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64d1a83c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:47:15, skipping insertion in model container [2022-12-14 07:47:15,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:47:15" (3/3) ... [2022-12-14 07:47:15,529 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-12-14 07:47:15,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:47:15,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-14 07:47:15,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:47:15,600 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 07:47:15,631 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:47:15,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 286 flow [2022-12-14 07:47:15,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 286 flow [2022-12-14 07:47:15,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 286 flow [2022-12-14 07:47:15,700 INFO L130 PetriNetUnfolder]: 9/133 cut-off events. [2022-12-14 07:47:15,700 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:47:15,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 9/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 110 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2022-12-14 07:47:15,706 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-12-14 07:47:28,205 INFO L134 LiptonReduction]: Checked pairs total: 901 [2022-12-14 07:47:28,205 INFO L136 LiptonReduction]: Total number of compositions: 146 [2022-12-14 07:47:28,211 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2022-12-14 07:47:28,223 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 07:47:28,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:47:28,239 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;@16664d95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:47:28,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-12-14 07:47:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 07:47:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:47:28,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:28,244 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:47:28,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 18717, now seen corresponding path program 1 times [2022-12-14 07:47:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:28,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818034044] [2022-12-14 07:47:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:28,257 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 07:47:28,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:28,258 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:47:28,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:28,399 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:47:28,400 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 07:47:28,419 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 07:47:28,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:28,420 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818034044] [2022-12-14 07:47:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818034044] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:28,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:28,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829248828] [2022-12-14 07:47:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:28,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:28,450 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 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 07:47:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:28,557 INFO L93 Difference]: Finished difference Result 104 states and 249 transitions. [2022-12-14 07:47:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:28,559 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 07:47:28,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:28,565 INFO L225 Difference]: With dead ends: 104 [2022-12-14 07:47:28,565 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:47:28,565 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 07:47:28,567 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:28,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:28,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:47:28,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-12-14 07:47:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 4.016129032258065) internal successors, (249), 103 states have internal predecessors, (249), 0 states have call successors, (0), 0 states 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 07:47:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 249 transitions. [2022-12-14 07:47:28,593 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 249 transitions. Word has length 2 [2022-12-14 07:47:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:28,594 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 249 transitions. [2022-12-14 07:47:28,594 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 07:47:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 249 transitions. [2022-12-14 07:47:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:47:28,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:28,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:47:28,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,799 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 18718, now seen corresponding path program 1 times [2022-12-14 07:47:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:28,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364502694] [2022-12-14 07:47:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:28,803 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 07:47:28,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:28,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:47:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:28,940 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:28,940 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 07:47:28,965 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 07:47:28,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:28,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:28,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364502694] [2022-12-14 07:47:28,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364502694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:28,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:28,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111840750] [2022-12-14 07:47:28,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:28,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:28,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:28,968 INFO L87 Difference]: Start difference. First operand 104 states and 249 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 07:47:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:29,158 INFO L93 Difference]: Finished difference Result 206 states and 496 transitions. [2022-12-14 07:47:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:29,159 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 07:47:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:29,160 INFO L225 Difference]: With dead ends: 206 [2022-12-14 07:47:29,160 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 07:47:29,160 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 07:47:29,161 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:29,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:47:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 07:47:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 105. [2022-12-14 07:47:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 4.015873015873016) internal successors, (253), 104 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 07:47:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 253 transitions. [2022-12-14 07:47:29,170 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 253 transitions. Word has length 2 [2022-12-14 07:47:29,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:29,171 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 253 transitions. [2022-12-14 07:47:29,171 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 07:47:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 253 transitions. [2022-12-14 07:47:29,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:47:29,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:29,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:47:29,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:29,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,373 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 18832, now seen corresponding path program 1 times [2022-12-14 07:47:29,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:29,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570310270] [2022-12-14 07:47:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:29,377 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 07:47:29,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:29,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:47:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:29,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:29,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:29,507 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:47:29,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 07:47:29,522 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 07:47:29,554 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 07:47:29,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:29,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:29,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570310270] [2022-12-14 07:47:29,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570310270] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:29,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:29,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237921069] [2022-12-14 07:47:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:29,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:29,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:29,556 INFO L87 Difference]: Start difference. First operand 105 states and 253 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 07:47:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:29,671 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2022-12-14 07:47:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:29,672 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 07:47:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:29,673 INFO L225 Difference]: With dead ends: 88 [2022-12-14 07:47:29,673 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 07:47:29,673 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 07:47:29,674 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:29,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 07:47:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 07:47:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 3.625) internal successors, (203), 87 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 07:47:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 203 transitions. [2022-12-14 07:47:29,682 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 203 transitions. Word has length 2 [2022-12-14 07:47:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:29,682 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 203 transitions. [2022-12-14 07:47:29,683 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 07:47:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 203 transitions. [2022-12-14 07:47:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:47:29,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:29,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:47:29,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,884 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:29,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:29,884 INFO L85 PathProgramCache]: Analyzing trace with hash 18833, now seen corresponding path program 1 times [2022-12-14 07:47:29,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:29,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447529378] [2022-12-14 07:47:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:29,885 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 07:47:29,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:29,886 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:29,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:47:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:29,952 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 07:47:29,953 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 07:47:29,974 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 07:47:29,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:29,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:29,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447529378] [2022-12-14 07:47:29,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1447529378] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:29,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:29,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320088008] [2022-12-14 07:47:29,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:29,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:29,976 INFO L87 Difference]: Start difference. First operand 88 states and 203 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 07:47:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:30,064 INFO L93 Difference]: Finished difference Result 71 states and 153 transitions. [2022-12-14 07:47:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:30,064 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 07:47:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:30,065 INFO L225 Difference]: With dead ends: 71 [2022-12-14 07:47:30,065 INFO L226 Difference]: Without dead ends: 71 [2022-12-14 07:47:30,065 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 07:47:30,066 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:30,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-12-14 07:47:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-12-14 07:47:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 3.122448979591837) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states 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 07:47:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-12-14 07:47:30,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 2 [2022-12-14 07:47:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:30,069 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-12-14 07:47:30,069 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 07:47:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-12-14 07:47:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:47:30,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:30,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:47:30,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:30,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:30,271 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 584375, now seen corresponding path program 1 times [2022-12-14 07:47:30,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:30,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480905901] [2022-12-14 07:47:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:30,285 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 07:47:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:30,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:30,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:30,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:47:30,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:30,438 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:30,438 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 07:47:30,491 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 07:47:30,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:30,660 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 07:47:30,660 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480905901] [2022-12-14 07:47:30,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480905901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:30,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914865099] [2022-12-14 07:47:30,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:30,661 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:47:30,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:47:30,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 07:47:30,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:30,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:47:30,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:30,800 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:30,800 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 07:47:30,833 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 07:47:30,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:30,897 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 07:47:30,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914865099] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:30,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045718164] [2022-12-14 07:47:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:30,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:30,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:30,899 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:30,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:47:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:47:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:31,004 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:31,005 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 07:47:31,044 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 07:47:31,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:31,192 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 07:47:31,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045718164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:31,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:47:31,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 07:47:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092999644] [2022-12-14 07:47:31,193 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:31,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:47:31,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:31,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:47:31,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:47:31,193 INFO L87 Difference]: Start difference. First operand 71 states and 153 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 07:47:32,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:32,159 INFO L93 Difference]: Finished difference Result 275 states and 600 transitions. [2022-12-14 07:47:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:47:32,160 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 07:47:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:32,162 INFO L225 Difference]: With dead ends: 275 [2022-12-14 07:47:32,162 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 07:47:32,162 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 07:47:32,162 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 146 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:32,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:47:32,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 07:47:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 74. [2022-12-14 07:47:32,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 73 states have internal predecessors, (159), 0 states have call successors, (0), 0 states 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 07:47:32,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 159 transitions. [2022-12-14 07:47:32,167 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 159 transitions. Word has length 3 [2022-12-14 07:47:32,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:32,168 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 159 transitions. [2022-12-14 07:47:32,168 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 07:47:32,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 159 transitions. [2022-12-14 07:47:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:47:32,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:32,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:47:32,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:32,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 07:47:32,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:32,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:32,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash 18112704, now seen corresponding path program 1 times [2022-12-14 07:47:32,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:32,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620444090] [2022-12-14 07:47:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:32,773 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 07:47:32,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:32,774 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:32,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:47:32,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:32,860 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:47:32,860 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 07:47:32,873 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 07:47:32,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:32,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:32,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620444090] [2022-12-14 07:47:32,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620444090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:32,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:32,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:32,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756847612] [2022-12-14 07:47:32,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:32,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:47:32,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:47:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:47:32,875 INFO L87 Difference]: Start difference. First operand 74 states and 159 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:32,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:32,954 INFO L93 Difference]: Finished difference Result 52 states and 108 transitions. [2022-12-14 07:47:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:47:32,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 07:47:32,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:32,955 INFO L225 Difference]: With dead ends: 52 [2022-12-14 07:47:32,955 INFO L226 Difference]: Without dead ends: 52 [2022-12-14 07:47:32,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:47:32,956 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:32,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-14 07:47:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-12-14 07:47:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 2.769230769230769) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 0 states 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 07:47:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 108 transitions. [2022-12-14 07:47:32,961 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 108 transitions. Word has length 4 [2022-12-14 07:47:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:32,961 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 108 transitions. [2022-12-14 07:47:32,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 108 transitions. [2022-12-14 07:47:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:47:32,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:32,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:47:32,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:33,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash 18112736, now seen corresponding path program 1 times [2022-12-14 07:47:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:33,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618567717] [2022-12-14 07:47:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:33,166 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 07:47:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:33,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:33,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:47:33,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:47:33,256 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 07:47:33,256 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 07:47:33,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-12-14 07:47:33,284 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 07:47:33,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:33,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:33,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618567717] [2022-12-14 07:47:33,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618567717] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:33,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:33,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:33,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484453333] [2022-12-14 07:47:33,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:33,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:33,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:33,286 INFO L87 Difference]: Start difference. First operand 52 states and 108 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:33,373 INFO L93 Difference]: Finished difference Result 46 states and 96 transitions. [2022-12-14 07:47:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 07:47:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:33,374 INFO L225 Difference]: With dead ends: 46 [2022-12-14 07:47:33,374 INFO L226 Difference]: Without dead ends: 46 [2022-12-14 07:47:33,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 07:47:33,375 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:33,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-14 07:47:33,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-12-14 07:47:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 45 states have internal predecessors, (96), 0 states have call successors, (0), 0 states 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 07:47:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 96 transitions. [2022-12-14 07:47:33,379 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 96 transitions. Word has length 4 [2022-12-14 07:47:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:33,379 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 96 transitions. [2022-12-14 07:47:33,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 96 transitions. [2022-12-14 07:47:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:47:33,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:33,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:47:33,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:33,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:33,582 INFO L85 PathProgramCache]: Analyzing trace with hash 18112737, now seen corresponding path program 1 times [2022-12-14 07:47:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:33,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94715630] [2022-12-14 07:47:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:33,584 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 07:47:33,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:33,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Waiting until timeout for monitored process [2022-12-14 07:47:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:33,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:47:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:33,701 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 07:47:33,702 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 22 [2022-12-14 07:47:33,719 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 07:47:33,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:33,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:33,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94715630] [2022-12-14 07:47:33,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94715630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:33,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:33,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:33,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872005826] [2022-12-14 07:47:33,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:33,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:33,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:33,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:33,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:33,721 INFO L87 Difference]: Start difference. First operand 46 states and 96 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:33,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:33,785 INFO L93 Difference]: Finished difference Result 40 states and 84 transitions. [2022-12-14 07:47:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:33,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 07:47:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:33,786 INFO L225 Difference]: With dead ends: 40 [2022-12-14 07:47:33,786 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 07:47:33,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 07:47:33,787 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:33,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 07:47:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 07:47:33,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 2.4) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 07:47:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 84 transitions. [2022-12-14 07:47:33,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 84 transitions. Word has length 4 [2022-12-14 07:47:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:33,789 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 84 transitions. [2022-12-14 07:47:33,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:33,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 84 transitions. [2022-12-14 07:47:33,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:47:33,789 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:33,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:47:33,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Ended with exit code 0 [2022-12-14 07:47:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 18112706, now seen corresponding path program 1 times [2022-12-14 07:47:33,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:33,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119642740] [2022-12-14 07:47:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:33,993 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 07:47:33,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:33,996 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:33,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:47:34,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:34,149 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 07:47:34,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:34,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:34,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119642740] [2022-12-14 07:47:34,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119642740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:34,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:34,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:34,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336676990] [2022-12-14 07:47:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:47:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:47:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:47:34,150 INFO L87 Difference]: Start difference. First operand 40 states and 84 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:34,293 INFO L93 Difference]: Finished difference Result 59 states and 111 transitions. [2022-12-14 07:47:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:47:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-12-14 07:47:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:34,294 INFO L225 Difference]: With dead ends: 59 [2022-12-14 07:47:34,294 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 07:47:34,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 07:47:34,295 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:34,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:34,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 07:47:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-12-14 07:47:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 52 states have internal predecessors, (106), 0 states have call successors, (0), 0 states 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 07:47:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 106 transitions. [2022-12-14 07:47:34,297 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 106 transitions. Word has length 4 [2022-12-14 07:47:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:34,297 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 106 transitions. [2022-12-14 07:47:34,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states 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 07:47:34,297 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 106 transitions. [2022-12-14 07:47:34,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:34,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:34,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:34,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:34,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:34,499 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:34,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash 561709083, now seen corresponding path program 1 times [2022-12-14 07:47:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:34,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [527031009] [2022-12-14 07:47:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:34,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:47:34,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:34,504 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:34,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:47:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:34,717 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:34,718 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 07:47:34,810 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 07:47:34,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:35,807 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 07:47:35,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [527031009] [2022-12-14 07:47:35,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [527031009] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [616143734] [2022-12-14 07:47:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:47:35,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:47:35,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 07:47:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:35,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:47:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:35,939 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:35,939 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 07:47:36,077 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 07:47:36,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:36,450 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 07:47:36,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [616143734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:36,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939329378] [2022-12-14 07:47:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:36,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:36,451 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:36,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:47:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:36,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:47:36,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:36,578 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:36,578 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 07:47:36,635 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 07:47:36,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:36,828 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 07:47:36,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939329378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:36,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:47:36,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-12-14 07:47:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841623370] [2022-12-14 07:47:36,829 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:36,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:47:36,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:47:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:47:36,830 INFO L87 Difference]: Start difference. First operand 53 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 07:47:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:40,034 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2022-12-14 07:47:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 07:47:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 5 [2022-12-14 07:47:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:40,035 INFO L225 Difference]: With dead ends: 97 [2022-12-14 07:47:40,035 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 07:47:40,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:47:40,036 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:40,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 07:47:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 07:47:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2022-12-14 07:47:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states 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 07:47:40,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 140 transitions. [2022-12-14 07:47:40,038 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 140 transitions. Word has length 5 [2022-12-14 07:47:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:40,039 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 140 transitions. [2022-12-14 07:47:40,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 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 07:47:40,039 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 140 transitions. [2022-12-14 07:47:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:47:40,039 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:40,039 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 07:47:40,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 07:47:40,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:40,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:40,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:40,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:40,642 INFO L85 PathProgramCache]: Analyzing trace with hash 233334622, now seen corresponding path program 2 times [2022-12-14 07:47:40,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:40,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [734500931] [2022-12-14 07:47:40,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:47:40,644 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 07:47:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:40,647 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:40,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:40,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:47:40,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:47:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:40,765 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:40,766 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 07:47:40,868 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 07:47:40,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:41,369 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 07:47:41,369 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [734500931] [2022-12-14 07:47:41,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [734500931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965781570] [2022-12-14 07:47:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:47:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:47:41,371 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:47:41,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 07:47:41,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:47:41,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:47:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:41,563 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:41,564 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 07:47:41,637 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 07:47:41,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:42,357 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 07:47:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965781570] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:42,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531324979] [2022-12-14 07:47:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:47:42,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:42,359 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:42,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 07:47:42,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:47:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:42,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:47:42,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:42,499 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:42,499 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 07:47:42,548 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 07:47:42,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:42,688 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 07:47:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531324979] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:42,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:47:42,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 07:47:42,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525395670] [2022-12-14 07:47:42,688 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 07:47:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 07:47:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:47:42,689 INFO L87 Difference]: Start difference. First operand 66 states and 140 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:45,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:45,547 INFO L93 Difference]: Finished difference Result 287 states and 600 transitions. [2022-12-14 07:47:45,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:47:45,548 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:47:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:45,549 INFO L225 Difference]: With dead ends: 287 [2022-12-14 07:47:45,549 INFO L226 Difference]: Without dead ends: 287 [2022-12-14 07:47:45,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:47:45,550 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 629 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:45,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 0 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 07:47:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-12-14 07:47:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 72. [2022-12-14 07:47:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 71 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 07:47:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 152 transitions. [2022-12-14 07:47:45,553 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 152 transitions. Word has length 6 [2022-12-14 07:47:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:45,553 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 152 transitions. [2022-12-14 07:47:45,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 152 transitions. [2022-12-14 07:47:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 07:47:45,554 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:45,554 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2022-12-14 07:47:45,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:45,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:45,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-12-14 07:47:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:46,156 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:46,157 INFO L85 PathProgramCache]: Analyzing trace with hash 896397058, now seen corresponding path program 2 times [2022-12-14 07:47:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:46,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819233235] [2022-12-14 07:47:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:47:46,159 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 07:47:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:46,160 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:46,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (19)] Waiting until timeout for monitored process [2022-12-14 07:47:46,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:47:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:47:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:46,280 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:46,280 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 07:47:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:47:46,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:46,347 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:46,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819233235] [2022-12-14 07:47:46,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819233235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:46,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:46,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474586841] [2022-12-14 07:47:46,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:46,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:47:46,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:47:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:47:46,348 INFO L87 Difference]: Start difference. First operand 72 states and 152 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:46,457 INFO L93 Difference]: Finished difference Result 58 states and 119 transitions. [2022-12-14 07:47:46,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:47:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 07:47:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:46,458 INFO L225 Difference]: With dead ends: 58 [2022-12-14 07:47:46,458 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 07:47:46,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 07:47:46,459 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:46,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 07:47:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2022-12-14 07:47:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 07:47:46,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-12-14 07:47:46,461 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 8 [2022-12-14 07:47:46,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:46,461 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-12-14 07:47:46,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-12-14 07:47:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:47:46,461 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:46,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:47:46,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (19)] Ended with exit code 0 [2022-12-14 07:47:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:46,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:46,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:46,664 INFO L85 PathProgramCache]: Analyzing trace with hash 502855676, now seen corresponding path program 1 times [2022-12-14 07:47:46,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006429051] [2022-12-14 07:47:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:46,665 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 07:47:46,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:46,668 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:46,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:46,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:47:46,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:46,758 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 07:47:46,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:47:46,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:46,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006429051] [2022-12-14 07:47:46,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006429051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:46,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:46,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:47:46,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42721969] [2022-12-14 07:47:46,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:46,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:46,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:46,759 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 07:47:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:46,837 INFO L93 Difference]: Finished difference Result 58 states and 114 transitions. [2022-12-14 07:47:46,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:46,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 07:47:46,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:46,837 INFO L225 Difference]: With dead ends: 58 [2022-12-14 07:47:46,837 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 07:47:46,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 07:47:46,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:46,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:47:46,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 07:47:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 07:47:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 07:47:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2022-12-14 07:47:46,842 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 12 [2022-12-14 07:47:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:46,842 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2022-12-14 07:47:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states 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 07:47:46,842 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2022-12-14 07:47:46,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:47:46,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:46,842 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 07:47:46,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:47,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:47:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1775663294, now seen corresponding path program 3 times [2022-12-14 07:47:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:47:47,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987223748] [2022-12-14 07:47:47,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:47:47,047 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 07:47:47,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:47:47,050 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:47:47,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (21)] Waiting until timeout for monitored process [2022-12-14 07:47:47,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:47:47,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:47:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:47,379 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:47,379 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 07:47:47,729 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 07:47:47,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:50,190 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 07:47:50,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:47:50,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987223748] [2022-12-14 07:47:50,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987223748] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:50,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1874227788] [2022-12-14 07:47:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:47:50,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:47:50,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:47:50,192 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:47:50,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 07:47:50,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:47:50,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:47:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:50,802 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:50,802 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 07:47:50,986 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 07:47:50,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:53,811 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 07:47:53,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1874227788] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:53,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263765563] [2022-12-14 07:47:53,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:47:53,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:47:53,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:47:53,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:47:53,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 07:47:56,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:47:56,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:47:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:47:56,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:47:56,193 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:47:56,193 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 07:47:56,306 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 07:47:56,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:47:56,623 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 07:47:56,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263765563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:47:56,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:47:56,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 07:47:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646509401] [2022-12-14 07:47:56,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:47:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 07:47:56,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:47:56,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 07:47:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:47:56,625 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:13,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:13,817 INFO L93 Difference]: Finished difference Result 550 states and 1160 transitions. [2022-12-14 07:48:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:48:13,819 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:48:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:13,821 INFO L225 Difference]: With dead ends: 550 [2022-12-14 07:48:13,821 INFO L226 Difference]: Without dead ends: 550 [2022-12-14 07:48:13,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:48:13,822 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2496 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2496 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:13,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2496 Valid, 0 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1889 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-12-14 07:48:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-12-14 07:48:13,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 50. [2022-12-14 07:48:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states 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 07:48:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2022-12-14 07:48:13,829 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 12 [2022-12-14 07:48:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:13,829 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2022-12-14 07:48:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:48:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2022-12-14 07:48:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 07:48:13,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:13,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:13,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 07:48:14,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (21)] Ended with exit code 0 [2022-12-14 07:48:14,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 07:48:14,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:48:14,432 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:48:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1294275878, now seen corresponding path program 1 times [2022-12-14 07:48:14,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:48:14,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [476383779] [2022-12-14 07:48:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:14,436 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 07:48:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:48:14,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:48:14,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:48:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 07:48:14,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:48:14,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:48:14,537 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:48:14,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [476383779] [2022-12-14 07:48:14,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [476383779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:48:14,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:48:14,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:48:14,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439576786] [2022-12-14 07:48:14,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:48:14,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:48:14,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:48:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:48:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:48:14,538 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 07:48:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:48:14,605 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2022-12-14 07:48:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:48:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 07:48:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:48:14,606 INFO L225 Difference]: With dead ends: 60 [2022-12-14 07:48:14,606 INFO L226 Difference]: Without dead ends: 54 [2022-12-14 07:48:14,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 07:48:14,606 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:48:14,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:48:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-14 07:48:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-12-14 07:48:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 07:48:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-12-14 07:48:14,608 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 14 [2022-12-14 07:48:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:48:14,608 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-12-14 07:48:14,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states 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 07:48:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-12-14 07:48:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:48:14,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:48:14,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:48:14,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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)] Ended with exit code 0 [2022-12-14 07:48:14,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:48:14,810 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:48:14,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:48:14,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1923358754, now seen corresponding path program 1 times [2022-12-14 07:48:14,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:48:14,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409491859] [2022-12-14 07:48:14,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:14,813 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 07:48:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:48:14,814 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:48:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (25)] Waiting until timeout for monitored process [2022-12-14 07:48:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:14,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:48:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:14,977 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:48:14,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:48:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:48:15,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:15,110 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:48:15,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-12-14 07:48:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:48:15,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:48:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409491859] [2022-12-14 07:48:15,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409491859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:15,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391793947] [2022-12-14 07:48:15,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:48:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:48:15,139 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:48:15,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 07:48:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 07:48:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:15,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:15,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:15,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:48:15,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-14 07:48:15,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:48:15,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:48:15,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:48:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:15,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:16,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:48:16,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 426 treesize of output 189 [2022-12-14 07:48:32,833 WARN L233 SmtUtils]: Spent 16.38s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:48:32,833 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:48:32,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 756 treesize of output 664 [2022-12-14 07:48:49,212 WARN L233 SmtUtils]: Spent 16.37s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:48:49,213 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:48:49,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 616 treesize of output 556 [2022-12-14 07:48:49,312 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:48:49,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 508 treesize of output 299 [2022-12-14 07:48:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:49,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1391793947] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:49,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827742340] [2022-12-14 07:48:49,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:48:49,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:48:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:48:49,548 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:48:49,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 07:48:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:48:49,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:48:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:48:51,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:48:51,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:48:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:51,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:48:52,310 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:48:52,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-12-14 07:48:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:48:52,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827742340] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:48:52,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:48:52,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6, 6, 5, 5] total 22 [2022-12-14 07:48:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024255087] [2022-12-14 07:48:52,680 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:48:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 07:48:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:48:52,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 07:48:52,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=400, Unknown=9, NotChecked=0, Total=552 [2022-12-14 07:48:52,680 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:49:17,347 WARN L233 SmtUtils]: Spent 24.19s on a formula simplification. DAG size of input: 98 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:49:19,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 07:49:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:22,056 INFO L93 Difference]: Finished difference Result 124 states and 260 transitions. [2022-12-14 07:49:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 07:49:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 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 07:49:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:22,058 INFO L225 Difference]: With dead ends: 124 [2022-12-14 07:49:22,058 INFO L226 Difference]: Without dead ends: 103 [2022-12-14 07:49:22,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=260, Invalid=722, Unknown=10, NotChecked=0, Total=992 [2022-12-14 07:49:22,059 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 13 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:22,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 258 Invalid, 7 Unknown, 0 Unchecked, 3.5s Time] [2022-12-14 07:49:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-14 07:49:22,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2022-12-14 07:49:22,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states 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 07:49:22,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2022-12-14 07:49:22,061 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 15 [2022-12-14 07:49:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:22,061 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2022-12-14 07:49:22,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states 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 07:49:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2022-12-14 07:49:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:49:22,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:22,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:22,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-12-14 07:49:22,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 07:49:22,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (25)] Forceful destruction successful, exit code 0 [2022-12-14 07:49:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:22,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:49:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 34085540, now seen corresponding path program 2 times [2022-12-14 07:49:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:49:22,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375684321] [2022-12-14 07:49:22,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:49:22,667 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 07:49:22,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:49:22,669 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:22,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:22,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:49:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:22,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:49:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:22,890 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 39 treesize of output 37 [2022-12-14 07:49:22,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 07:49:23,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:49:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:49:23,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:23,143 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_706 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_706) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-12-14 07:49:23,272 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:49:23,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-12-14 07:49:23,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:23,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-12-14 07:49:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:49:23,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:49:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375684321] [2022-12-14 07:49:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375684321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695007213] [2022-12-14 07:49:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:49:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:49:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:49:23,426 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:49:23,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 07:49:23,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:49:23,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889147674] [2022-12-14 07:49:23,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:49:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:49:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:23,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 1 [2022-12-14 07:49:23,625 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:49:23,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 07:49:23,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:49:23,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 07:49:23,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:23,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 07:49:23,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:23,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-12-14 07:49:23,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:49:24,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-12-14 07:49:24,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:24,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:49:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:24,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:24,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:24,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 414 treesize of output 177 [2022-12-14 07:49:25,142 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:49:25,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 466 treesize of output 409 [2022-12-14 07:49:25,320 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-12-14 07:49:25,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 361 treesize of output 328 [2022-12-14 07:49:25,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:25,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 142 [2022-12-14 07:49:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:27,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889147674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:27,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 07:49:27,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6] total 19 [2022-12-14 07:49:27,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75538943] [2022-12-14 07:49:27,042 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 07:49:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:49:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:49:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:49:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=308, Unknown=1, NotChecked=36, Total=420 [2022-12-14 07:49:27,043 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 07:49:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:30,302 INFO L93 Difference]: Finished difference Result 162 states and 348 transitions. [2022-12-14 07:49:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:49:30,303 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 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 07:49:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:30,303 INFO L225 Difference]: With dead ends: 162 [2022-12-14 07:49:30,303 INFO L226 Difference]: Without dead ends: 141 [2022-12-14 07:49:30,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=185, Invalid=628, Unknown=3, NotChecked=54, Total=870 [2022-12-14 07:49:30,304 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 24 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:30,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 213 Invalid, 9 Unknown, 45 Unchecked, 1.2s Time] [2022-12-14 07:49:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-12-14 07:49:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 75. [2022-12-14 07:49:30,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states 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 07:49:30,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2022-12-14 07:49:30,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 15 [2022-12-14 07:49:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:30,307 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2022-12-14 07:49:30,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 07:49:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2022-12-14 07:49:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:49:30,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:30,307 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:30,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 07:49:30,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:30,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:30,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:49:30,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:30,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1488822722, now seen corresponding path program 3 times [2022-12-14 07:49:30,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:49:30,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961809792] [2022-12-14 07:49:30,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:49:30,711 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 07:49:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:49:30,712 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:30,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:30,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:49:30,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:30,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 07:49:30,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:30,992 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:49:30,992 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 07:49:31,033 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 17 treesize of output 13 [2022-12-14 07:49:31,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:31,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:31,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:31,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:31,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:31,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:31,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 31 [2022-12-14 07:49:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:31,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:31,680 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:49:31,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-12-14 07:49:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:32,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:49:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961809792] [2022-12-14 07:49:32,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961809792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:32,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672976267] [2022-12-14 07:49:32,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:49:32,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:49:32,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:49:32,022 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:49:32,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 07:49:32,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:49:32,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 07:49:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:32,361 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:49:32,361 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 07:49:32,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 07:49:32,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:49:32,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:49:32,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:32,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:32,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:32,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:32,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:32,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:32,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:32,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:32,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:49:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:33,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:34,079 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:34,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 426 treesize of output 189 [2022-12-14 07:49:34,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,252 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:49:42,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:42,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 368 treesize of output 346 [2022-12-14 07:49:42,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:42,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,439 WARN L233 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:49:50,439 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:50,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 298 treesize of output 238 [2022-12-14 07:49:50,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:50,512 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-12-14 07:49:50,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 157 treesize of output 110 [2022-12-14 07:49:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672976267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694107952] [2022-12-14 07:49:50,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:49:50,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:49:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:50,800 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:49:50,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 07:49:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:49:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:49:50,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:51,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:51,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:51,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:49:51,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:51,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:49:51,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:49:51,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 79 treesize of output 31 [2022-12-14 07:49:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:51,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:51,575 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:49:51,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-12-14 07:49:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:49:51,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694107952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:51,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:49:51,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 5, 5] total 24 [2022-12-14 07:49:51,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093220950] [2022-12-14 07:49:51,862 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:49:51,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:49:51,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:49:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:49:51,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=537, Unknown=1, NotChecked=0, Total=650 [2022-12-14 07:49:51,863 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:49:53,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:53,871 INFO L93 Difference]: Finished difference Result 100 states and 208 transitions. [2022-12-14 07:49:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:49:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 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 17 [2022-12-14 07:49:53,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:53,872 INFO L225 Difference]: With dead ends: 100 [2022-12-14 07:49:53,872 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 07:49:53,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=188, Invalid=741, Unknown=1, NotChecked=0, Total=930 [2022-12-14 07:49:53,873 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:53,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:49:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 07:49:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 07:49:53,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states 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 07:49:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2022-12-14 07:49:53,875 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 17 [2022-12-14 07:49:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:53,875 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2022-12-14 07:49:53,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 07:49:53,875 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2022-12-14 07:49:53,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:49:53,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:53,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:53,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 07:49:54,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:54,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 07:49:54,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:49:54,479 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:49:54,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:49:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash -439202296, now seen corresponding path program 4 times [2022-12-14 07:49:54,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:49:54,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694292750] [2022-12-14 07:49:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:49:54,482 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 07:49:54,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:49:54,485 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:49:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (34)] Waiting until timeout for monitored process [2022-12-14 07:49:54,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:49:54,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:49:54,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:54,679 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:49:54,679 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 07:49:54,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 07:49:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:54,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:55,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:49:55,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694292750] [2022-12-14 07:49:55,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694292750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:55,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1405745703] [2022-12-14 07:49:55,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:49:55,604 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:49:55,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:49:55,605 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:49:55,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 07:49:55,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:49:55,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 07:49:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:56,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1405745703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:56,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026403085] [2022-12-14 07:49:56,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 07:49:56,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:49:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:49:56,515 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:49:56,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 07:49:56,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 07:49:56,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:49:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:49:56,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:49:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:56,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:49:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:49:58,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026403085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:49:58,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:49:58,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 25 [2022-12-14 07:49:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922069304] [2022-12-14 07:49:58,025 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:49:58,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 07:49:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:49:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 07:49:58,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2022-12-14 07:49:58,028 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 07:49:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:49:59,667 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2022-12-14 07:49:59,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:49:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 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 17 [2022-12-14 07:49:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:49:59,670 INFO L225 Difference]: With dead ends: 195 [2022-12-14 07:49:59,670 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 07:49:59,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2022-12-14 07:49:59,670 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 129 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:49:59,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 0 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 07:49:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 07:49:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 113. [2022-12-14 07:49:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 2.3063063063063063) internal successors, (256), 112 states have internal predecessors, (256), 0 states have call successors, (0), 0 states 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 07:49:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 256 transitions. [2022-12-14 07:49:59,673 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 256 transitions. Word has length 17 [2022-12-14 07:49:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:49:59,673 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 256 transitions. [2022-12-14 07:49:59,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 07:49:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 256 transitions. [2022-12-14 07:49:59,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:49:59,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:49:59,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:49:59,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 07:49:59,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (34)] Forceful destruction successful, exit code 0 [2022-12-14 07:50:00,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 07:50:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:50:00,276 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:50:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1339345086, now seen corresponding path program 5 times [2022-12-14 07:50:00,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:50:00,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066583859] [2022-12-14 07:50:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:50:00,279 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 07:50:00,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:50:00,280 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:50:00,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (37)] Waiting until timeout for monitored process [2022-12-14 07:50:00,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:50:00,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:50:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:50:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:00,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:00,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:50:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:00,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:00,704 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-12-14 07:50:00,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-12-14 07:50:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:00,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:50:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066583859] [2022-12-14 07:50:00,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066583859] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:00,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1845303415] [2022-12-14 07:50:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:50:00,788 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:50:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:50:00,788 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:50:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 07:50:01,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:50:01,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:50:01,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:50:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:01,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:01,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 28 [2022-12-14 07:50:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:01,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:07,744 INFO L321 Elim1Store]: treesize reduction 424, result has 3.9 percent of original size [2022-12-14 07:50:07,744 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 12 new quantified variables, introduced 66 case distinctions, treesize of input 137 treesize of output 46 [2022-12-14 07:50:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:07,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1845303415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302182581] [2022-12-14 07:50:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 07:50:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:07,871 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:50:07,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 07:50:07,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:50:07,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:50:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 07:50:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:08,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:08,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:50:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:08,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:09,243 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-12-14 07:50:09,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-12-14 07:50:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:10,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302182581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:10,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:50:10,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 8, 8] total 27 [2022-12-14 07:50:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307401722] [2022-12-14 07:50:10,362 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:50:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:50:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:50:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:50:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=660, Unknown=3, NotChecked=0, Total=812 [2022-12-14 07:50:10,364 INFO L87 Difference]: Start difference. First operand 113 states and 256 transitions. Second operand has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 07:50:23,585 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 69 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:50:26,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:31,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:34,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:41,629 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:50:43,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:46,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:48,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:51,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:50:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:50:51,914 INFO L93 Difference]: Finished difference Result 586 states and 1341 transitions. [2022-12-14 07:50:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 07:50:51,915 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 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 18 [2022-12-14 07:50:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:50:51,917 INFO L225 Difference]: With dead ends: 586 [2022-12-14 07:50:51,917 INFO L226 Difference]: Without dead ends: 414 [2022-12-14 07:50:51,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=596, Invalid=2592, Unknown=4, NotChecked=0, Total=3192 [2022-12-14 07:50:51,918 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 339 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 45 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:50:51,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 0 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 857 Invalid, 7 Unknown, 0 Unchecked, 17.5s Time] [2022-12-14 07:50:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-14 07:50:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 190. [2022-12-14 07:50:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 2.6117021276595747) internal successors, (491), 189 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:50:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 491 transitions. [2022-12-14 07:50:51,927 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 491 transitions. Word has length 18 [2022-12-14 07:50:51,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:50:51,927 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 491 transitions. [2022-12-14 07:50:51,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 28 states have internal predecessors, (75), 0 states have call successors, (0), 0 states 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 07:50:51,927 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 491 transitions. [2022-12-14 07:50:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 07:50:51,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:50:51,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:50:51,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (37)] Ended with exit code 0 [2022-12-14 07:50:52,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-14 07:50:52,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 07:50:52,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:50:52,532 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:50:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:50:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash -213942146, now seen corresponding path program 6 times [2022-12-14 07:50:52,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:50:52,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723556984] [2022-12-14 07:50:52,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:50:52,534 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 07:50:52,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:50:52,535 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:50:52,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (40)] Waiting until timeout for monitored process [2022-12-14 07:50:52,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 07:50:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:50:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:50:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:52,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 07:50:52,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-12-14 07:50:52,983 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:52,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:50:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:53,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:53,246 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-12-14 07:50:53,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 81 [2022-12-14 07:50:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 07:50:53,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:50:53,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723556984] [2022-12-14 07:50:53,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723556984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:53,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [516033371] [2022-12-14 07:50:53,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:50:53,526 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:50:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:50:53,527 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:50:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 07:50:53,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 07:50:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700984785] [2022-12-14 07:50:53,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 07:50:53,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:50:53,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:50:53,731 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:50:53,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 07:50:53,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 1 [2022-12-14 07:50:53,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 07:50:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:50:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 07:50:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:50:53,865 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 39 treesize of output 37 [2022-12-14 07:50:54,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-12-14 07:50:54,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:54,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:50:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:54,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:50:55,420 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-12-14 07:50:55,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-12-14 07:50:55,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:50:55,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-12-14 07:50:56,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:50:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700984785] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:50:56,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 07:50:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9] total 27 [2022-12-14 07:50:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613414301] [2022-12-14 07:50:56,607 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 07:50:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:50:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:50:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:50:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-12-14 07:50:56,609 INFO L87 Difference]: Start difference. First operand 190 states and 491 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 07:50:59,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:51:03,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 07:51:08,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:51:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:09,615 INFO L93 Difference]: Finished difference Result 521 states and 1295 transitions. [2022-12-14 07:51:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 07:51:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 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 18 [2022-12-14 07:51:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:09,618 INFO L225 Difference]: With dead ends: 521 [2022-12-14 07:51:09,618 INFO L226 Difference]: Without dead ends: 471 [2022-12-14 07:51:09,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=346, Invalid=1631, Unknown=3, NotChecked=0, Total=1980 [2022-12-14 07:51:09,619 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 432 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 53 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:09,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 0 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 590 Invalid, 13 Unknown, 0 Unchecked, 8.6s Time] [2022-12-14 07:51:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-12-14 07:51:09,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 190. [2022-12-14 07:51:09,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 2.5851063829787235) internal successors, (486), 189 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 07:51:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 486 transitions. [2022-12-14 07:51:09,624 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 486 transitions. Word has length 18 [2022-12-14 07:51:09,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:09,624 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 486 transitions. [2022-12-14 07:51:09,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 07:51:09,625 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 486 transitions. [2022-12-14 07:51:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 07:51:09,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:09,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:09,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 07:51:09,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (40)] Forceful destruction successful, exit code 0 [2022-12-14 07:51:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:51:10,027 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:51:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:10,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1760383767, now seen corresponding path program 7 times [2022-12-14 07:51:10,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:51:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403705363] [2022-12-14 07:51:10,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:51:10,030 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 07:51:10,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:51:10,031 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:51:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (43)] Waiting until timeout for monitored process [2022-12-14 07:51:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:10,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:51:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:10,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:51:10,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:51:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:51:10,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:10,420 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-12-14 07:51:10,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 90 treesize of output 27 [2022-12-14 07:51:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 07:51:10,544 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:51:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403705363] [2022-12-14 07:51:10,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403705363] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:51:10,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [59412021] [2022-12-14 07:51:10,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:51:10,544 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:51:10,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:51:10,545 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:51:10,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 07:51:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:10,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:51:10,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:51:11,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:51:11,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [59412021] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:51:11,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806059102] [2022-12-14 07:51:11,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 07:51:11,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:51:11,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:51:11,950 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:51:11,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 07:51:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:51:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:51:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:51:12,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:14,391 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:51:14,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806059102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:51:14,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:51:14,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 8, 8] total 35 [2022-12-14 07:51:14,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364070650] [2022-12-14 07:51:14,392 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:51:14,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 07:51:14,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:51:14,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 07:51:14,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 07:51:14,393 INFO L87 Difference]: Start difference. First operand 190 states and 486 transitions. Second operand has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 07:51:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:51:26,655 INFO L93 Difference]: Finished difference Result 409 states and 858 transitions. [2022-12-14 07:51:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 07:51:26,655 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 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 20 [2022-12-14 07:51:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:51:26,656 INFO L225 Difference]: With dead ends: 409 [2022-12-14 07:51:26,656 INFO L226 Difference]: Without dead ends: 268 [2022-12-14 07:51:26,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=669, Invalid=3237, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 07:51:26,657 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 507 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-12-14 07:51:26,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 0 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-12-14 07:51:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-12-14 07:51:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 128. [2022-12-14 07:51:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 2.4126984126984126) internal successors, (304), 127 states have internal predecessors, (304), 0 states have call successors, (0), 0 states 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 07:51:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 304 transitions. [2022-12-14 07:51:26,660 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 304 transitions. Word has length 20 [2022-12-14 07:51:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:51:26,661 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 304 transitions. [2022-12-14 07:51:26,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.5277777777777777) internal successors, (91), 35 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 07:51:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 304 transitions. [2022-12-14 07:51:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 07:51:26,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:51:26,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:51:26,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (43)] Ended with exit code 0 [2022-12-14 07:51:26,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-12-14 07:51:27,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 07:51:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:51:27,264 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-12-14 07:51:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:51:27,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1101084254, now seen corresponding path program 8 times [2022-12-14 07:51:27,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:51:27,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376345277] [2022-12-14 07:51:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:51:27,266 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 07:51:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:51:27,267 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:51:27,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (46)] Waiting until timeout for monitored process [2022-12-14 07:51:27,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:51:27,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:51:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:51:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:27,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:51:27,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-12-14 07:51:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:27,895 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-12-14 07:51:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-12-14 07:51:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 07:51:28,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:51:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376345277] [2022-12-14 07:51:28,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376345277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:51:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376932005] [2022-12-14 07:51:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:51:28,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:51:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:51:28,040 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:51:28,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 07:51:29,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:51:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:51:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 07:51:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:51:29,213 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:51:29,213 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 07:51:29,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 07:51:29,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:51:29,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:51:31,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:51:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:51:31,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:51:42,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:51:42,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 428 treesize of output 191 [2022-12-14 07:51:42,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:42,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,652 WARN L233 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:51:50,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:51:50,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 772 treesize of output 676 [2022-12-14 07:51:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:50,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,837 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:51:58,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:51:58,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 474 treesize of output 410 [2022-12-14 07:51:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:51:58,924 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-12-14 07:51:58,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 516 treesize of output 299 [2022-12-14 07:52:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:52:00,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376932005] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:52:00,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522947750] [2022-12-14 07:52:00,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:52:00,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:52:00,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:52:00,633 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:52:00,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 07:52:00,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:52:00,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:52:00,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-14 07:52:00,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:52:00,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 07:52:00,819 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 07:52:00,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 22 [2022-12-14 07:52:01,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-12-14 07:52:01,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:52:01,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 07:52:04,646 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 17 treesize of output 13 [2022-12-14 07:52:05,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:52:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-12-14 07:52:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:52:05,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:52:19,787 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:52:19,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 428 treesize of output 191 [2022-12-14 07:52:19,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:19,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:27,985 WARN L233 SmtUtils]: Spent 8.15s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:52:27,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:52:27,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 772 treesize of output 676 [2022-12-14 07:52:28,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:28,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,208 WARN L233 SmtUtils]: Spent 8.18s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:52:36,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 07:52:36,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 628 treesize of output 452 [2022-12-14 07:52:36,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 07:52:36,317 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-12-14 07:52:36,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 299 [2022-12-14 07:52:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:52:38,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522947750] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:52:38,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:52:38,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 12, 12, 12, 12] total 55 [2022-12-14 07:52:38,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744665464] [2022-12-14 07:52:38,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:52:38,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 07:52:38,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:52:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 07:52:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2670, Unknown=13, NotChecked=0, Total=3192 [2022-12-14 07:52:38,691 INFO L87 Difference]: Start difference. First operand 128 states and 304 transitions. Second operand has 57 states, 56 states have (on average 1.8571428571428572) internal successors, (104), 56 states have internal predecessors, (104), 0 states have call successors, (0), 0 states 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 07:52:43,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:52:45,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:52:47,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:55:19,933 WARN L233 SmtUtils]: Spent 2.54m on a formula simplification. DAG size of input: 92 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:56:47,805 WARN L233 SmtUtils]: Spent 1.45m on a formula simplification. DAG size of input: 186 DAG size of output: 131 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:56:49,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:56:51,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:57:00,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:57:02,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:57:04,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 07:58:33,114 WARN L233 SmtUtils]: Spent 1.47m on a formula simplification. DAG size of input: 88 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:59:25,187 WARN L233 SmtUtils]: Spent 49.07s on a formula simplification. DAG size of input: 174 DAG size of output: 119 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:59:45,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2022-12-14 07:59:45,842 WARN L230 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2022-12-14 07:59:45,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 07:59:45,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 420.1s TimeCoverageRelationStatistics Valid=930, Invalid=4603, Unknown=17, NotChecked=0, Total=5550 [2022-12-14 07:59:45,844 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 185 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 40 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:59:45,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 0 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 458 Invalid, 8 Unknown, 0 Unchecked, 18.0s Time] [2022-12-14 07:59:45,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 07:59:46,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-12-14 07:59:46,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 (46)] Forceful destruction successful, exit code 0 [2022-12-14 07:59:46,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/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 07:59:46,448 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:61) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:625) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:165) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:361) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:391) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) ... 55 more [2022-12-14 07:59:46,454 INFO L158 Benchmark]: Toolchain (without parser) took 751787.72ms. Allocated memory is still 71.3MB. Free memory was 50.2MB in the beginning and 23.3MB in the end (delta: 26.9MB). Peak memory consumption was 38.1MB. Max. memory is 16.1GB. [2022-12-14 07:59:46,455 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory is still 35.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:59:46,455 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.28ms. Allocated memory is still 71.3MB. Free memory was 50.0MB in the beginning and 36.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 07:59:46,456 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.18ms. Allocated memory is still 71.3MB. Free memory was 36.2MB in the beginning and 52.3MB in the end (delta: -16.1MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. [2022-12-14 07:59:46,456 INFO L158 Benchmark]: Boogie Preprocessor took 27.65ms. Allocated memory is still 71.3MB. Free memory was 52.0MB in the beginning and 50.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:59:46,457 INFO L158 Benchmark]: RCFGBuilder took 532.92ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 38.8MB in the end (delta: 11.7MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. [2022-12-14 07:59:46,457 INFO L158 Benchmark]: TraceAbstraction took 750929.23ms. Allocated memory is still 71.3MB. Free memory was 38.0MB in the beginning and 23.3MB in the end (delta: 14.7MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. [2022-12-14 07:59:46,458 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory is still 35.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.28ms. Allocated memory is still 71.3MB. Free memory was 50.0MB in the beginning and 36.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.18ms. Allocated memory is still 71.3MB. Free memory was 36.2MB in the beginning and 52.3MB in the end (delta: -16.1MB). Peak memory consumption was 3.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.65ms. Allocated memory is still 71.3MB. Free memory was 52.0MB in the beginning and 50.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 532.92ms. Allocated memory is still 71.3MB. Free memory was 50.5MB in the beginning and 38.8MB in the end (delta: 11.7MB). Peak memory consumption was 25.1MB. Max. memory is 16.1GB. * TraceAbstraction took 750929.23ms. Allocated memory is still 71.3MB. Free memory was 38.0MB in the beginning and 23.3MB in the end (delta: 14.7MB). Peak memory consumption was 22.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.6s, 133 PlacesBefore, 37 PlacesAfterwards, 135 TransitionsBefore, 33 TransitionsAfterwards, 660 CoEnabledTransitionPairs, 7 FixpointIterations, 91 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 7 ConcurrentYvCompositions, 6 ChoiceCompositions, 146 TotalNumberOfCompositions, 901 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 881, independent: 871, independent conditional: 0, independent unconditional: 871, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 408, independent: 407, independent conditional: 0, independent unconditional: 407, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 408, independent: 407, independent conditional: 0, independent unconditional: 407, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 33, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 33, dependent conditional: 0, dependent unconditional: 33, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 881, independent: 464, independent conditional: 0, independent unconditional: 464, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 408, unknown conditional: 0, unknown unconditional: 408] , Statistics on independence cache: Total cache size (in pairs): 39, Positive cache size: 38, Positive conditional cache size: 0, Positive unconditional cache size: 38, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:243) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_919b98d1-47f5-4954-8186-65a6e8af42a8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory")