./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0 --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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --- 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-e04fb08 [2022-11-16 19:47:32,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:47:32,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:47:32,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:47:32,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:47:32,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:47:32,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:47:32,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:47:32,673 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:47:32,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:47:32,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:47:32,676 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:47:32,676 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:47:32,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:47:32,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:47:32,693 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:47:32,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:47:32,702 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:47:32,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:47:32,706 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:47:32,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:47:32,715 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:47:32,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:47:32,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:47:32,724 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:47:32,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:47:32,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:47:32,731 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:47:32,732 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:47:32,732 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:47:32,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:47:32,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:47:32,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:47:32,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:47:32,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:47:32,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:47:32,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:47:32,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:47:32,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:47:32,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:47:32,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:47:32,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:47:32,771 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:47:32,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:47:32,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:47:32,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:47:32,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:47:32,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:47:32,775 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:47:32,776 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:47:32,776 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:47:32,777 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:47:32,777 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:47:32,778 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:47:32,778 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:47:32,779 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:47:32,779 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:47:32,779 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:47:32,779 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:47:32,780 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:47:32,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:47:32,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:47:32,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:47:32,783 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:47:32,783 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:47:32,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:47:32,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:47:32,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:47:32,785 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:47:32,785 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:47:32,785 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:47:32,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:47:32,786 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:47:32,786 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:47:32,786 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:47:32,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:47:32,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:47:32,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:47:32,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:47:32,787 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:47:32,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:47:32,788 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:47:32,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:47:32,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:47:32,789 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 [2022-11-16 19:47:33,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:47:33,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:47:33,092 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:47:33,094 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:47:33,095 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:47:33,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-11-16 19:47:33,167 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/5566795fb/e49908fb31ec42b6bb1b2bffd79712b2/FLAGba5e39348 [2022-11-16 19:47:33,580 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:47:33,581 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-11-16 19:47:33,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/5566795fb/e49908fb31ec42b6bb1b2bffd79712b2/FLAGba5e39348 [2022-11-16 19:47:33,994 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/5566795fb/e49908fb31ec42b6bb1b2bffd79712b2 [2022-11-16 19:47:33,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:47:33,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:47:33,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:47:34,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:47:34,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:47:34,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:47:33" (1/1) ... [2022-11-16 19:47:34,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16137fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:34, skipping insertion in model container [2022-11-16 19:47:34,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:47:33" (1/1) ... [2022-11-16 19:47:34,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:47:34,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:47:34,297 WARN L229 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-11-16 19:47:34,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:47:34,331 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 19:47:34,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5bc69613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:34, skipping insertion in model container [2022-11-16 19:47:34,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:47:34,333 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 19:47:34,335 INFO L158 Benchmark]: Toolchain (without parser) took 336.08ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 48.8MB in the beginning and 94.0MB in the end (delta: -45.2MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2022-11-16 19:47:34,337 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 35.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:47:34,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 333.12ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 48.6MB in the beginning and 94.0MB in the end (delta: -45.4MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. [2022-11-16 19:47:34,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 35.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 333.12ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 48.6MB in the beginning and 94.0MB in the end (delta: -45.4MB). Peak memory consumption was 5.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 137]: 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0 --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 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 --- 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-e04fb08 [2022-11-16 19:47:36,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:47:36,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:47:36,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:47:36,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:47:36,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:47:36,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:47:36,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:47:36,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:47:36,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:47:36,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:47:36,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:47:36,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:47:36,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:47:36,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:47:36,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:47:36,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:47:36,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:47:36,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:47:36,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:47:36,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:47:36,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:47:36,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:47:36,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:47:36,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:47:36,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:47:36,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:47:36,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:47:36,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:47:36,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:47:36,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:47:36,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:47:36,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:47:36,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:47:36,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:47:36,322 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:47:36,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:47:36,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:47:36,324 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:47:36,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:47:36,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:47:36,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 19:47:36,366 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:47:36,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:47:36,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:47:36,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:47:36,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:47:36,368 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:47:36,368 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:47:36,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:47:36,368 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:47:36,369 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:47:36,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:47:36,369 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:47:36,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:47:36,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:47:36,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:47:36,370 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:47:36,370 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:47:36,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:47:36,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:47:36,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:47:36,372 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 19:47:36,372 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 19:47:36,372 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:47:36,372 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:47:36,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:47:36,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 19:47:36,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:47:36,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:47:36,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:47:36,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:47:36,374 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 19:47:36,374 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 19:47:36,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:47:36,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 19:47:36,374 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73462fb8dbdc39f07edabdd79150cbad579fbba379eb033cd2e89802bbb8b9a6 [2022-11-16 19:47:36,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:47:36,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:47:36,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:47:36,787 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:47:36,791 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:47:36,792 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-11-16 19:47:36,872 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/67e79d5fc/221903d70fc64793a577d69d34418d99/FLAG52ea1d749 [2022-11-16 19:47:37,473 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:47:37,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c [2022-11-16 19:47:37,481 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/67e79d5fc/221903d70fc64793a577d69d34418d99/FLAG52ea1d749 [2022-11-16 19:47:37,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/data/67e79d5fc/221903d70fc64793a577d69d34418d99 [2022-11-16 19:47:37,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:47:37,805 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:47:37,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:47:37,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:47:37,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:47:37,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:47:37" (1/1) ... [2022-11-16 19:47:37,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e75076f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:37, skipping insertion in model container [2022-11-16 19:47:37,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:47:37" (1/1) ... [2022-11-16 19:47:37,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:47:37,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:47:38,022 WARN L229 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-11-16 19:47:38,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:47:38,041 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 19:47:38,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:47:38,066 WARN L229 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-11-16 19:47:38,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:47:38,083 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:47:38,112 WARN L229 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_8dcbf800-e39c-4b61-830e-0fb6f88b3877/sv-benchmarks/c/weaver/chl-word-trans.wvr.c[3292,3305] [2022-11-16 19:47:38,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:47:38,131 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:47:38,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38 WrapperNode [2022-11-16 19:47:38,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:47:38,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:47:38,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:47:38,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:47:38,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,181 INFO L138 Inliner]: procedures = 27, calls = 44, calls flagged for inlining = 8, calls inlined = 12, statements flattened = 163 [2022-11-16 19:47:38,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:47:38,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:47:38,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:47:38,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:47:38,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:47:38,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:47:38,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:47:38,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:47:38,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (1/1) ... [2022-11-16 19:47:38,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:47:38,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:38,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:47:38,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:47:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:47:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 19:47:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:47:38,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 19:47:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 19:47:38,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 19:47:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 19:47:38,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 19:47:38,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 19:47:38,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 19:47:38,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:47:38,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:47:38,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:47:38,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:47:38,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 19:47:38,375 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 19:47:38,536 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:47:38,538 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:47:39,448 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:47:39,459 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:47:39,460 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 19:47:39,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:47:39 BoogieIcfgContainer [2022-11-16 19:47:39,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:47:39,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:47:39,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:47:39,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:47:39,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:47:37" (1/3) ... [2022-11-16 19:47:39,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6386d1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:47:39, skipping insertion in model container [2022-11-16 19:47:39,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:47:38" (2/3) ... [2022-11-16 19:47:39,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6386d1b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:47:39, skipping insertion in model container [2022-11-16 19:47:39,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:47:39" (3/3) ... [2022-11-16 19:47:39,470 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-trans.wvr.c [2022-11-16 19:47:39,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:47:39,498 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-16 19:47:39,498 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 19:47:39,662 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 19:47:39,723 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 19:47:39,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 339 transitions, 702 flow [2022-11-16 19:47:39,750 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 339 transitions, 702 flow [2022-11-16 19:47:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 339 transitions, 702 flow [2022-11-16 19:47:39,964 INFO L130 PetriNetUnfolder]: 28/336 cut-off events. [2022-11-16 19:47:39,965 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-16 19:47:39,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 336 events. 28/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 620 event pairs, 0 based on Foata normal form. 0/264 useless extension candidates. Maximal degree in co-relation 261. Up to 3 conditions per place. [2022-11-16 19:47:39,987 INFO L119 LiptonReduction]: Number of co-enabled transitions 12768 [2022-11-16 19:48:30,663 INFO L134 LiptonReduction]: Checked pairs total: 24461 [2022-11-16 19:48:30,663 INFO L136 LiptonReduction]: Total number of compositions: 367 [2022-11-16 19:48:30,671 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 86 transitions, 196 flow [2022-11-16 19:48:31,130 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:31,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:48:31,160 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;@383c1bd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:48:31,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2022-11-16 19:48:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:48:31,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:31,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:48:31,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:31,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:31,215 INFO L85 PathProgramCache]: Analyzing trace with hash 41708, now seen corresponding path program 1 times [2022-11-16 19:48:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:31,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [860871195] [2022-11-16 19:48:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:31,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:31,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:31,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:31,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 19:48:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:48:31,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:31,579 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:48:31,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:48:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:31,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:31,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:31,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [860871195] [2022-11-16 19:48:31,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [860871195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:31,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:31,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:48:31,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294523069] [2022-11-16 19:48:31,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:31,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:31,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:48:31,665 INFO L87 Difference]: Start difference. First operand has 10140 states, 7584 states have (on average 5.325290084388186) internal successors, (40387), 10139 states have internal predecessors, (40387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:32,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:32,357 INFO L93 Difference]: Finished difference Result 6760 states and 26991 transitions. [2022-11-16 19:48:32,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:32,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:48:32,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:32,506 INFO L225 Difference]: With dead ends: 6760 [2022-11-16 19:48:32,506 INFO L226 Difference]: Without dead ends: 6760 [2022-11-16 19:48:32,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:48:32,512 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:32,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 19:48:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6760 states. [2022-11-16 19:48:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6760 to 6760. [2022-11-16 19:48:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 5260 states have (on average 5.131368821292775) internal successors, (26991), 6759 states have internal predecessors, (26991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 26991 transitions. [2022-11-16 19:48:33,093 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 26991 transitions. Word has length 2 [2022-11-16 19:48:33,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:33,093 INFO L495 AbstractCegarLoop]: Abstraction has 6760 states and 26991 transitions. [2022-11-16 19:48:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 26991 transitions. [2022-11-16 19:48:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:48:33,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:33,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:48:33,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:33,311 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 41709, now seen corresponding path program 1 times [2022-11-16 19:48:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:33,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567369958] [2022-11-16 19:48:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:33,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:33,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:33,317 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:33,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 19:48:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:33,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:48:33,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:33,591 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:33,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:33,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:33,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:33,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567369958] [2022-11-16 19:48:33,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567369958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:33,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:33,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:48:33,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568284601] [2022-11-16 19:48:33,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:48:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:48:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:48:33,639 INFO L87 Difference]: Start difference. First operand 6760 states and 26991 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:34,983 INFO L93 Difference]: Finished difference Result 13516 states and 53978 transitions. [2022-11-16 19:48:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:48:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:35,195 INFO L225 Difference]: With dead ends: 13516 [2022-11-16 19:48:35,214 INFO L226 Difference]: Without dead ends: 13516 [2022-11-16 19:48:35,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:48:35,216 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:35,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:48:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13516 states. [2022-11-16 19:48:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13516 to 6763. [2022-11-16 19:48:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 5263 states have (on average 5.129963898916968) internal successors, (26999), 6762 states have internal predecessors, (26999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 26999 transitions. [2022-11-16 19:48:35,952 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 26999 transitions. Word has length 2 [2022-11-16 19:48:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:35,960 INFO L495 AbstractCegarLoop]: Abstraction has 6763 states and 26999 transitions. [2022-11-16 19:48:35,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 26999 transitions. [2022-11-16 19:48:35,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:48:35,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:35,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:48:35,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-16 19:48:36,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:36,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1299038, now seen corresponding path program 1 times [2022-11-16 19:48:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:36,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919996601] [2022-11-16 19:48:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:36,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:36,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:36,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:36,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 19:48:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:48:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:36,407 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:36,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:36,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:36,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:36,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919996601] [2022-11-16 19:48:36,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919996601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:36,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [708072065] [2022-11-16 19:48:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:36,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:48:36,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:48:36,738 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:48:36,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-16 19:48:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:36,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:48:36,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:37,027 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:37,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:37,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:37,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [708072065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564231678] [2022-11-16 19:48:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:37,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:37,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:48:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:48:37,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:37,488 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:37,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:37,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:37,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564231678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:37,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:48:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-16 19:48:37,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327875376] [2022-11-16 19:48:37,687 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:48:37,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:48:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:37,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:48:37,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:48:37,688 INFO L87 Difference]: Start difference. First operand 6763 states and 26999 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:39,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:40,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:43,877 INFO L93 Difference]: Finished difference Result 27031 states and 107960 transitions. [2022-11-16 19:48:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:48:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 19:48:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:44,134 INFO L225 Difference]: With dead ends: 27031 [2022-11-16 19:48:44,135 INFO L226 Difference]: Without dead ends: 27031 [2022-11-16 19:48:44,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:48:44,140 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 387 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:44,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 0 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 19:48:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27031 states. [2022-11-16 19:48:44,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27031 to 6772. [2022-11-16 19:48:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 5272 states have (on average 5.125758725341426) internal successors, (27023), 6771 states have internal predecessors, (27023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 27023 transitions. [2022-11-16 19:48:44,758 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 27023 transitions. Word has length 3 [2022-11-16 19:48:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:44,758 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 27023 transitions. [2022-11-16 19:48:44,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 27023 transitions. [2022-11-16 19:48:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:48:44,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:44,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:48:44,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:45,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 19:48:45,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:45,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:45,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 40351961, now seen corresponding path program 1 times [2022-11-16 19:48:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:45,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [754396599] [2022-11-16 19:48:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:45,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:45,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:45,373 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:45,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 19:48:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:45,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:48:45,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:45,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,599 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 19:48:45,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-16 19:48:45,626 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 19:48:45,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 19:48:45,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:48:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:45,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:48:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:45,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:45,750 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [754396599] [2022-11-16 19:48:45,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [754396599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:45,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:45,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:48:45,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545754510] [2022-11-16 19:48:45,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:45,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:48:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:45,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:48:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:45,752 INFO L87 Difference]: Start difference. First operand 6772 states and 27023 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) [2022-11-16 19:48:46,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:46,216 INFO L93 Difference]: Finished difference Result 5399 states and 20942 transitions. [2022-11-16 19:48:46,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:46,217 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 [2022-11-16 19:48:46,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:46,241 INFO L225 Difference]: With dead ends: 5399 [2022-11-16 19:48:46,242 INFO L226 Difference]: Without dead ends: 5399 [2022-11-16 19:48:46,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:46,243 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:46,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 19:48:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5399 states. [2022-11-16 19:48:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5399 to 5399. [2022-11-16 19:48:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5399 states, 4305 states have (on average 4.864576074332172) internal successors, (20942), 5398 states have internal predecessors, (20942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:46,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5399 states to 5399 states and 20942 transitions. [2022-11-16 19:48:46,404 INFO L78 Accepts]: Start accepts. Automaton has 5399 states and 20942 transitions. Word has length 4 [2022-11-16 19:48:46,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:46,404 INFO L495 AbstractCegarLoop]: Abstraction has 5399 states and 20942 transitions. [2022-11-16 19:48:46,404 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) [2022-11-16 19:48:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 5399 states and 20942 transitions. [2022-11-16 19:48:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:48:46,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:46,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:48:46,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:46,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:46,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 40351962, now seen corresponding path program 1 times [2022-11-16 19:48:46,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:46,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015118997] [2022-11-16 19:48:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:46,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:46,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:46,621 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:46,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 19:48:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:46,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:48:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:46,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:46,937 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-16 19:48:46,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-16 19:48:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:47,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:48:47,091 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:48:47,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:48:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:47,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:47,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:47,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015118997] [2022-11-16 19:48:47,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015118997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:47,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:47,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:48:47,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203365460] [2022-11-16 19:48:47,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:47,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:48:47,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:47,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:48:47,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:47,110 INFO L87 Difference]: Start difference. First operand 5399 states and 20942 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) [2022-11-16 19:48:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:47,532 INFO L93 Difference]: Finished difference Result 4026 states and 14861 transitions. [2022-11-16 19:48:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:47,533 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 [2022-11-16 19:48:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:47,548 INFO L225 Difference]: With dead ends: 4026 [2022-11-16 19:48:47,548 INFO L226 Difference]: Without dead ends: 4026 [2022-11-16 19:48:47,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:47,549 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 134 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:47,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 19:48:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2022-11-16 19:48:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 4026. [2022-11-16 19:48:47,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4026 states, 3338 states have (on average 4.452067106051528) internal successors, (14861), 4025 states have internal predecessors, (14861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4026 states to 4026 states and 14861 transitions. [2022-11-16 19:48:47,696 INFO L78 Accepts]: Start accepts. Automaton has 4026 states and 14861 transitions. Word has length 4 [2022-11-16 19:48:47,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:47,696 INFO L495 AbstractCegarLoop]: Abstraction has 4026 states and 14861 transitions. [2022-11-16 19:48:47,697 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) [2022-11-16 19:48:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4026 states and 14861 transitions. [2022-11-16 19:48:47,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:48:47,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:47,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:48:47,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-16 19:48:47,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:47,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash 123557291, now seen corresponding path program 1 times [2022-11-16 19:48:47,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:47,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395376867] [2022-11-16 19:48:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:47,915 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:47,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:47,919 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:47,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 19:48:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:48:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:48,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:48,154 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 19:48:48,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 19:48:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:48,435 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 19:48:48,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-16 19:48:48,654 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-16 19:48:48,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 19:48:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:48,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:48,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:48,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395376867] [2022-11-16 19:48:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395376867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:48,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:48,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:48:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513688553] [2022-11-16 19:48:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:48:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:48,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:48:48,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:48,798 INFO L87 Difference]: Start difference. First operand 4026 states and 14861 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:49,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:49,115 INFO L93 Difference]: Finished difference Result 4030 states and 14870 transitions. [2022-11-16 19:48:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:48:49,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:48:49,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:49,130 INFO L225 Difference]: With dead ends: 4030 [2022-11-16 19:48:49,130 INFO L226 Difference]: Without dead ends: 4030 [2022-11-16 19:48:49,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:49,131 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:49,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-11-16 19:48:49,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2022-11-16 19:48:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 4030. [2022-11-16 19:48:49,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 3342 states have (on average 4.449431478156792) internal successors, (14870), 4029 states have internal predecessors, (14870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 14870 transitions. [2022-11-16 19:48:49,275 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 14870 transitions. Word has length 6 [2022-11-16 19:48:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:49,276 INFO L495 AbstractCegarLoop]: Abstraction has 4030 states and 14870 transitions. [2022-11-16 19:48:49,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:49,276 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 14870 transitions. [2022-11-16 19:48:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:48:49,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:49,277 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:48:49,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-11-16 19:48:49,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:49,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:49,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:49,489 INFO L85 PathProgramCache]: Analyzing trace with hash 123557292, now seen corresponding path program 1 times [2022-11-16 19:48:49,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:49,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607388619] [2022-11-16 19:48:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:48:49,489 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:49,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:49,490 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:49,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 19:48:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:48:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:48:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:49,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:49,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:49,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:49,737 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 19:48:49,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 19:48:49,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:48:49,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:49,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:48:49,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:48:49,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:48:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:49,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:48:49,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:49,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607388619] [2022-11-16 19:48:49,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607388619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:48:49,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:48:49,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:48:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678478537] [2022-11-16 19:48:49,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:48:49,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:48:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:49,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:48:49,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:49,911 INFO L87 Difference]: Start difference. First operand 4030 states and 14870 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:50,334 INFO L93 Difference]: Finished difference Result 3918 states and 14517 transitions. [2022-11-16 19:48:50,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:48:50,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:48:50,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:50,347 INFO L225 Difference]: With dead ends: 3918 [2022-11-16 19:48:50,347 INFO L226 Difference]: Without dead ends: 3918 [2022-11-16 19:48:50,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:48:50,348 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 128 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:50,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-16 19:48:50,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3918 states. [2022-11-16 19:48:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3918 to 3918. [2022-11-16 19:48:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3284 states have (on average 4.420523751522533) internal successors, (14517), 3917 states have internal predecessors, (14517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 14517 transitions. [2022-11-16 19:48:50,454 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 14517 transitions. Word has length 6 [2022-11-16 19:48:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:50,454 INFO L495 AbstractCegarLoop]: Abstraction has 3918 states and 14517 transitions. [2022-11-16 19:48:50,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:50,455 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 14517 transitions. [2022-11-16 19:48:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:48:50,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:50,455 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 19:48:50,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:50,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:50,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:48:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash 50951981, now seen corresponding path program 2 times [2022-11-16 19:48:50,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:50,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532377817] [2022-11-16 19:48:50,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:48:50,668 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:50,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:50,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 19:48:50,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:48:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:48:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:50,916 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:50,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:51,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:51,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:51,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:51,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532377817] [2022-11-16 19:48:51,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532377817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:51,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [857171459] [2022-11-16 19:48:51,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:48:51,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:48:51,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:48:51,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:48:51,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-16 19:48:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:48:51,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:48:51,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:52,115 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:52,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:52,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:53,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [857171459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:53,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808485895] [2022-11-16 19:48:53,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:48:53,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:53,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:53,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:48:53,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:48:53,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:48:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:53,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:48:53,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:48:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:53,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:53,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808485895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:53,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:48:53,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-16 19:48:53,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992438218] [2022-11-16 19:48:53,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:48:53,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:48:53,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:48:53,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:48:53,619 INFO L87 Difference]: Start difference. First operand 3918 states and 14517 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:57,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:58,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:59,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:01,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:03,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:05,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:08,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:10,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:12,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:14,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:16,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:17,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:19,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:21,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:23,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:25,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:27,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:29,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:30,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:31,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:33,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:35,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:37,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:40,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:42,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:49:52,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:52,309 INFO L93 Difference]: Finished difference Result 35099 states and 130355 transitions. [2022-11-16 19:49:52,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:49:52,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:49:52,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:52,551 INFO L225 Difference]: With dead ends: 35099 [2022-11-16 19:49:52,551 INFO L226 Difference]: Without dead ends: 35099 [2022-11-16 19:49:52,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:49:52,552 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 155 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2308 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:52,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2308 Valid, 0 Invalid, 2582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 2418 Invalid, 9 Unknown, 0 Unchecked, 56.0s Time] [2022-11-16 19:49:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35099 states. [2022-11-16 19:49:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35099 to 3935. [2022-11-16 19:49:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3301 states have (on average 4.409269918206604) internal successors, (14555), 3934 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 14555 transitions. [2022-11-16 19:49:52,916 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 14555 transitions. Word has length 6 [2022-11-16 19:49:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:52,916 INFO L495 AbstractCegarLoop]: Abstraction has 3935 states and 14555 transitions. [2022-11-16 19:49:52,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 14555 transitions. [2022-11-16 19:49:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:49:52,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:52,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:52,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-16 19:49:53,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:53,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:53,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:53,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:49:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:49:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -498428754, now seen corresponding path program 1 times [2022-11-16 19:49:53,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:49:53,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802128669] [2022-11-16 19:49:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:49:53,526 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:53,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:49:53,527 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:49:53,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 19:49:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:49:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:49:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:49:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:53,763 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-16 19:49:53,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-16 19:49:53,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:53,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:49:53,915 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:49:53,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:49:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:49:53,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:49:53,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:49:53,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802128669] [2022-11-16 19:49:53,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802128669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:49:53,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:49:53,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:49:53,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266209060] [2022-11-16 19:49:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:49:53,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:49:53,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:49:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:49:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:49:53,954 INFO L87 Difference]: Start difference. First operand 3935 states and 14555 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:54,386 INFO L93 Difference]: Finished difference Result 3823 states and 14203 transitions. [2022-11-16 19:49:54,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:49:54,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:49:54,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:54,398 INFO L225 Difference]: With dead ends: 3823 [2022-11-16 19:49:54,398 INFO L226 Difference]: Without dead ends: 3823 [2022-11-16 19:49:54,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:49:54,399 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:54,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 19:49:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2022-11-16 19:49:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3819. [2022-11-16 19:49:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3819 states, 3239 states have (on average 4.382525470824328) internal successors, (14195), 3818 states have internal predecessors, (14195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3819 states to 3819 states and 14195 transitions. [2022-11-16 19:49:54,509 INFO L78 Accepts]: Start accepts. Automaton has 3819 states and 14195 transitions. Word has length 7 [2022-11-16 19:49:54,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:54,509 INFO L495 AbstractCegarLoop]: Abstraction has 3819 states and 14195 transitions. [2022-11-16 19:49:54,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3819 states and 14195 transitions. [2022-11-16 19:49:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:49:54,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:54,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:54,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:54,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:49:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:49:54,727 INFO L85 PathProgramCache]: Analyzing trace with hash -464692377, now seen corresponding path program 1 times [2022-11-16 19:49:54,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:49:54,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383591050] [2022-11-16 19:49:54,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:49:54,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:54,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:49:54,729 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:49:54,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 19:49:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:49:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:49:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:49:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:49:54,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:49:54,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:49:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383591050] [2022-11-16 19:49:54,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383591050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:49:54,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:49:54,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:49:54,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214997014] [2022-11-16 19:49:54,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:49:54,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:49:54,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:49:54,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:49:54,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:54,908 INFO L87 Difference]: Start difference. First operand 3819 states and 14195 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:55,992 INFO L93 Difference]: Finished difference Result 5311 states and 19090 transitions. [2022-11-16 19:49:55,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:49:55,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:49:55,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:56,007 INFO L225 Difference]: With dead ends: 5311 [2022-11-16 19:49:56,007 INFO L226 Difference]: Without dead ends: 5311 [2022-11-16 19:49:56,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:56,008 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 85 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:56,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 3 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:49:56,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2022-11-16 19:49:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 4349. [2022-11-16 19:49:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4349 states, 3769 states have (on average 4.3358981162111965) internal successors, (16342), 4348 states have internal predecessors, (16342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4349 states to 4349 states and 16342 transitions. [2022-11-16 19:49:56,126 INFO L78 Accepts]: Start accepts. Automaton has 4349 states and 16342 transitions. Word has length 7 [2022-11-16 19:49:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:56,127 INFO L495 AbstractCegarLoop]: Abstraction has 4349 states and 16342 transitions. [2022-11-16 19:49:56,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4349 states and 16342 transitions. [2022-11-16 19:49:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:49:56,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:56,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:56,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:56,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:56,340 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:49:56,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:49:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1520499268, now seen corresponding path program 1 times [2022-11-16 19:49:56,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:49:56,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072241772] [2022-11-16 19:49:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:49:56,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:56,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:49:56,342 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:49:56,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 19:49:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:49:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:49:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:49:56,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:56,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:56,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:56,562 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 19:49:56,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-16 19:49:56,572 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 18 treesize of output 16 [2022-11-16 19:49:56,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:56,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:49:56,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:56,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:49:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:49:56,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:49:56,726 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:49:56,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072241772] [2022-11-16 19:49:56,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072241772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:49:56,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:49:56,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:49:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111798659] [2022-11-16 19:49:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:49:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:49:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:49:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:49:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:56,728 INFO L87 Difference]: Start difference. First operand 4349 states and 16342 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:57,173 INFO L93 Difference]: Finished difference Result 4118 states and 15581 transitions. [2022-11-16 19:49:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:49:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:49:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:57,189 INFO L225 Difference]: With dead ends: 4118 [2022-11-16 19:49:57,189 INFO L226 Difference]: Without dead ends: 4118 [2022-11-16 19:49:57,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:57,190 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:57,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 64 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 19:49:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4118 states. [2022-11-16 19:49:57,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4118 to 4118. [2022-11-16 19:49:57,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4118 states, 3624 states have (on average 4.29939293598234) internal successors, (15581), 4117 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4118 states to 4118 states and 15581 transitions. [2022-11-16 19:49:57,319 INFO L78 Accepts]: Start accepts. Automaton has 4118 states and 15581 transitions. Word has length 8 [2022-11-16 19:49:57,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:57,319 INFO L495 AbstractCegarLoop]: Abstraction has 4118 states and 15581 transitions. [2022-11-16 19:49:57,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:57,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4118 states and 15581 transitions. [2022-11-16 19:49:57,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:49:57,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:57,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:57,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:57,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:57,534 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:49:57,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:49:57,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1520499267, now seen corresponding path program 1 times [2022-11-16 19:49:57,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:49:57,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50350387] [2022-11-16 19:49:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:49:57,535 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:49:57,536 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:49:57,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 19:49:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:49:57,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:49:57,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:49:57,751 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:49:57,751 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 33 treesize of output 44 [2022-11-16 19:49:57,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:49:57,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:49:57,838 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:49:57,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:49:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:49:57,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:49:57,901 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:49:57,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50350387] [2022-11-16 19:49:57,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50350387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:49:57,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:49:57,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:49:57,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236311485] [2022-11-16 19:49:57,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:49:57,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:49:57,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:49:57,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:49:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:49:57,902 INFO L87 Difference]: Start difference. First operand 4118 states and 15581 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:58,298 INFO L93 Difference]: Finished difference Result 4128 states and 15609 transitions. [2022-11-16 19:49:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:49:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:49:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:58,311 INFO L225 Difference]: With dead ends: 4128 [2022-11-16 19:49:58,311 INFO L226 Difference]: Without dead ends: 4128 [2022-11-16 19:49:58,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:58,312 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:58,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:49:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2022-11-16 19:49:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 4128. [2022-11-16 19:49:58,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 3634 states have (on average 4.295266923500275) internal successors, (15609), 4127 states have internal predecessors, (15609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 15609 transitions. [2022-11-16 19:49:58,385 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 15609 transitions. Word has length 8 [2022-11-16 19:49:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:58,385 INFO L495 AbstractCegarLoop]: Abstraction has 4128 states and 15609 transitions. [2022-11-16 19:49:58,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 15609 transitions. [2022-11-16 19:49:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 19:49:58,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:58,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:58,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:49:58,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:58,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:49:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:49:58,595 INFO L85 PathProgramCache]: Analyzing trace with hash -323802474, now seen corresponding path program 1 times [2022-11-16 19:49:58,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:49:58,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909197760] [2022-11-16 19:49:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:49:58,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:49:58,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:49:58,596 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:49:58,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 19:49:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:49:58,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:49:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:49:58,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:49:58,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:49:58,799 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:49:58,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909197760] [2022-11-16 19:49:58,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909197760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:49:58,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:49:58,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:49:58,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417774674] [2022-11-16 19:49:58,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:49:58,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:49:58,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:49:58,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:49:58,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:58,801 INFO L87 Difference]: Start difference. First operand 4128 states and 15609 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:49:59,789 INFO L93 Difference]: Finished difference Result 6027 states and 22303 transitions. [2022-11-16 19:49:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:49:59,790 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 19:49:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:49:59,812 INFO L225 Difference]: With dead ends: 6027 [2022-11-16 19:49:59,812 INFO L226 Difference]: Without dead ends: 6027 [2022-11-16 19:49:59,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:49:59,813 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 80 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:49:59,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:49:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6027 states. [2022-11-16 19:49:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6027 to 4123. [2022-11-16 19:49:59,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 3629 states have (on average 4.297327087351888) internal successors, (15595), 4122 states have internal predecessors, (15595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 15595 transitions. [2022-11-16 19:49:59,908 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 15595 transitions. Word has length 8 [2022-11-16 19:49:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:49:59,908 INFO L495 AbstractCegarLoop]: Abstraction has 4123 states and 15595 transitions. [2022-11-16 19:49:59,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:49:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 15595 transitions. [2022-11-16 19:49:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:49:59,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:49:59,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:49:59,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:00,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:00,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:00,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2046332928, now seen corresponding path program 1 times [2022-11-16 19:50:00,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:00,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757108532] [2022-11-16 19:50:00,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:00,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:00,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:00,112 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:00,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 19:50:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:00,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:00,360 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:00,360 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 33 treesize of output 44 [2022-11-16 19:50:00,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:00,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:00,469 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:00,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:00,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:00,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:00,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757108532] [2022-11-16 19:50:00,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757108532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:00,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328584153] [2022-11-16 19:50:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:00,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:00,528 INFO L87 Difference]: Start difference. First operand 4123 states and 15595 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:00,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:00,931 INFO L93 Difference]: Finished difference Result 4131 states and 15619 transitions. [2022-11-16 19:50:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:00,944 INFO L225 Difference]: With dead ends: 4131 [2022-11-16 19:50:00,944 INFO L226 Difference]: Without dead ends: 4131 [2022-11-16 19:50:00,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:00,944 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:00,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2022-11-16 19:50:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4126. [2022-11-16 19:50:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4126 states, 3632 states have (on average 4.296530837004405) internal successors, (15605), 4125 states have internal predecessors, (15605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4126 states to 4126 states and 15605 transitions. [2022-11-16 19:50:01,019 INFO L78 Accepts]: Start accepts. Automaton has 4126 states and 15605 transitions. Word has length 9 [2022-11-16 19:50:01,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:01,019 INFO L495 AbstractCegarLoop]: Abstraction has 4126 states and 15605 transitions. [2022-11-16 19:50:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:01,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4126 states and 15605 transitions. [2022-11-16 19:50:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:01,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:01,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:01,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:01,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:01,223 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:01,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:01,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1222147454, now seen corresponding path program 1 times [2022-11-16 19:50:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:01,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059116944] [2022-11-16 19:50:01,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:01,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:01,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:01,225 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:01,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 19:50:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:01,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:01,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:01,458 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:01,459 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 33 treesize of output 44 [2022-11-16 19:50:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:01,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:01,569 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:01,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:01,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:01,632 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059116944] [2022-11-16 19:50:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059116944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:01,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:01,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:01,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887447969] [2022-11-16 19:50:01,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:01,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:01,634 INFO L87 Difference]: Start difference. First operand 4126 states and 15605 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:02,030 INFO L93 Difference]: Finished difference Result 4144 states and 15652 transitions. [2022-11-16 19:50:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:02,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:02,042 INFO L225 Difference]: With dead ends: 4144 [2022-11-16 19:50:02,042 INFO L226 Difference]: Without dead ends: 4144 [2022-11-16 19:50:02,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:02,043 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:02,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2022-11-16 19:50:02,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4136. [2022-11-16 19:50:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4136 states, 3642 states have (on average 4.29104887424492) internal successors, (15628), 4135 states have internal predecessors, (15628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4136 states to 4136 states and 15628 transitions. [2022-11-16 19:50:02,123 INFO L78 Accepts]: Start accepts. Automaton has 4136 states and 15628 transitions. Word has length 9 [2022-11-16 19:50:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:02,123 INFO L495 AbstractCegarLoop]: Abstraction has 4136 states and 15628 transitions. [2022-11-16 19:50:02,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4136 states and 15628 transitions. [2022-11-16 19:50:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:02,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:02,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:02,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:02,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:02,337 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:02,337 INFO L85 PathProgramCache]: Analyzing trace with hash 108378188, now seen corresponding path program 1 times [2022-11-16 19:50:02,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:02,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941233401] [2022-11-16 19:50:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:02,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:02,339 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:02,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:02,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:02,541 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:02,542 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 33 treesize of output 44 [2022-11-16 19:50:02,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:02,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:02,636 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:02,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:02,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:02,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941233401] [2022-11-16 19:50:02,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941233401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:02,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:02,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:02,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790061512] [2022-11-16 19:50:02,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:02,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:02,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:02,706 INFO L87 Difference]: Start difference. First operand 4136 states and 15628 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:03,164 INFO L93 Difference]: Finished difference Result 4143 states and 15645 transitions. [2022-11-16 19:50:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:03,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:03,176 INFO L225 Difference]: With dead ends: 4143 [2022-11-16 19:50:03,176 INFO L226 Difference]: Without dead ends: 4143 [2022-11-16 19:50:03,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:03,177 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:03,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2022-11-16 19:50:03,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 4143. [2022-11-16 19:50:03,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 3649 states have (on average 4.287476020827624) internal successors, (15645), 4142 states have internal predecessors, (15645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:03,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 15645 transitions. [2022-11-16 19:50:03,279 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 15645 transitions. Word has length 9 [2022-11-16 19:50:03,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:03,279 INFO L495 AbstractCegarLoop]: Abstraction has 4143 states and 15645 transitions. [2022-11-16 19:50:03,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:03,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 15645 transitions. [2022-11-16 19:50:03,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:03,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:03,280 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:03,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:03,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:03,481 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 107514249, now seen corresponding path program 1 times [2022-11-16 19:50:03,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237101763] [2022-11-16 19:50:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:03,482 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 [2022-11-16 19:50:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:03,483 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:03,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 19:50:03,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:03,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:03,688 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:03,689 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 33 treesize of output 44 [2022-11-16 19:50:03,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:03,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:03,778 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:03,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:03,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:03,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:03,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237101763] [2022-11-16 19:50:03,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237101763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:03,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:03,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:03,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902327276] [2022-11-16 19:50:03,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:03,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:03,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:03,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:03,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:03,851 INFO L87 Difference]: Start difference. First operand 4143 states and 15645 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:04,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:04,265 INFO L93 Difference]: Finished difference Result 4146 states and 15653 transitions. [2022-11-16 19:50:04,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:04,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:04,277 INFO L225 Difference]: With dead ends: 4146 [2022-11-16 19:50:04,277 INFO L226 Difference]: Without dead ends: 4146 [2022-11-16 19:50:04,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:04,278 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:04,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:04,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-11-16 19:50:04,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 4146. [2022-11-16 19:50:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 3652 states have (on average 4.286144578313253) internal successors, (15653), 4145 states have internal predecessors, (15653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 15653 transitions. [2022-11-16 19:50:04,358 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 15653 transitions. Word has length 9 [2022-11-16 19:50:04,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:04,358 INFO L495 AbstractCegarLoop]: Abstraction has 4146 states and 15653 transitions. [2022-11-16 19:50:04,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 15653 transitions. [2022-11-16 19:50:04,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:04,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:04,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:04,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:04,568 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:04,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash 109161696, now seen corresponding path program 1 times [2022-11-16 19:50:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:04,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376436818] [2022-11-16 19:50:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:04,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:04,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:04,570 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:04,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 19:50:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:04,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:04,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:04,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:04,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:04,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376436818] [2022-11-16 19:50:04,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376436818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:04,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:04,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:50:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878813075] [2022-11-16 19:50:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:04,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:50:04,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:04,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:50:04,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:04,832 INFO L87 Difference]: Start difference. First operand 4146 states and 15653 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:05,761 INFO L93 Difference]: Finished difference Result 7601 states and 28646 transitions. [2022-11-16 19:50:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:05,785 INFO L225 Difference]: With dead ends: 7601 [2022-11-16 19:50:05,785 INFO L226 Difference]: Without dead ends: 7601 [2022-11-16 19:50:05,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:50:05,786 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:05,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 0 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:50:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2022-11-16 19:50:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 4432. [2022-11-16 19:50:05,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3938 states have (on average 4.5332656170645) internal successors, (17852), 4431 states have internal predecessors, (17852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:05,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 17852 transitions. [2022-11-16 19:50:05,915 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 17852 transitions. Word has length 9 [2022-11-16 19:50:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:05,916 INFO L495 AbstractCegarLoop]: Abstraction has 4432 states and 17852 transitions. [2022-11-16 19:50:05,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 17852 transitions. [2022-11-16 19:50:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:05,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:05,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:05,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:06,117 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:06,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:06,117 INFO L85 PathProgramCache]: Analyzing trace with hash 109161639, now seen corresponding path program 1 times [2022-11-16 19:50:06,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:06,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591643426] [2022-11-16 19:50:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:06,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:06,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:06,119 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:06,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:06,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:50:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:06,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:06,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591643426] [2022-11-16 19:50:06,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591643426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:06,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:06,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:50:06,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830251422] [2022-11-16 19:50:06,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:06,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:50:06,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:50:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:06,306 INFO L87 Difference]: Start difference. First operand 4432 states and 17852 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:07,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:07,148 INFO L93 Difference]: Finished difference Result 4745 states and 18785 transitions. [2022-11-16 19:50:07,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:07,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:07,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:07,162 INFO L225 Difference]: With dead ends: 4745 [2022-11-16 19:50:07,162 INFO L226 Difference]: Without dead ends: 4745 [2022-11-16 19:50:07,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:07,162 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 49 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:07,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 4 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:50:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2022-11-16 19:50:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4568. [2022-11-16 19:50:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4074 states have (on average 4.509818360333824) internal successors, (18373), 4567 states have internal predecessors, (18373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 18373 transitions. [2022-11-16 19:50:07,273 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 18373 transitions. Word has length 9 [2022-11-16 19:50:07,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:07,273 INFO L495 AbstractCegarLoop]: Abstraction has 4568 states and 18373 transitions. [2022-11-16 19:50:07,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 18373 transitions. [2022-11-16 19:50:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:07,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:07,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:07,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:07,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:07,475 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:07,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 109161806, now seen corresponding path program 1 times [2022-11-16 19:50:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:07,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072396751] [2022-11-16 19:50:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:07,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:07,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:07,477 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:07,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:07,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:50:07,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:07,693 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:07,693 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 33 treesize of output 44 [2022-11-16 19:50:07,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:07,779 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:07,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:07,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:07,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:07,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:07,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072396751] [2022-11-16 19:50:07,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072396751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:07,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:07,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:07,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436080970] [2022-11-16 19:50:07,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:07,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:07,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:07,854 INFO L87 Difference]: Start difference. First operand 4568 states and 18373 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:08,286 INFO L93 Difference]: Finished difference Result 4569 states and 18377 transitions. [2022-11-16 19:50:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:08,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:08,302 INFO L225 Difference]: With dead ends: 4569 [2022-11-16 19:50:08,302 INFO L226 Difference]: Without dead ends: 4569 [2022-11-16 19:50:08,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:08,303 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:08,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:08,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-11-16 19:50:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 4569. [2022-11-16 19:50:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4075 states have (on average 4.509693251533743) internal successors, (18377), 4568 states have internal predecessors, (18377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 18377 transitions. [2022-11-16 19:50:08,389 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 18377 transitions. Word has length 9 [2022-11-16 19:50:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:08,389 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 18377 transitions. [2022-11-16 19:50:08,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 18377 transitions. [2022-11-16 19:50:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:08,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:08,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:08,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:08,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:08,591 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:08,591 INFO L85 PathProgramCache]: Analyzing trace with hash 109162953, now seen corresponding path program 1 times [2022-11-16 19:50:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:08,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17944419] [2022-11-16 19:50:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:08,592 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:08,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 19:50:08,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:50:08,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:08,822 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:50:08,823 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 33 treesize of output 44 [2022-11-16 19:50:08,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:08,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:08,913 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:08,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:08,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:08,977 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:08,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17944419] [2022-11-16 19:50:08,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17944419] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:08,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:08,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:08,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92039183] [2022-11-16 19:50:08,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:08,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:08,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:08,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:08,979 INFO L87 Difference]: Start difference. First operand 4569 states and 18377 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:09,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:09,377 INFO L93 Difference]: Finished difference Result 4570 states and 18380 transitions. [2022-11-16 19:50:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:50:09,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:09,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:09,390 INFO L225 Difference]: With dead ends: 4570 [2022-11-16 19:50:09,391 INFO L226 Difference]: Without dead ends: 4570 [2022-11-16 19:50:09,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:09,391 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:09,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-11-16 19:50:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4570 states. [2022-11-16 19:50:09,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4570 to 4570. [2022-11-16 19:50:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4076 states have (on average 4.5093228655544655) internal successors, (18380), 4569 states have internal predecessors, (18380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 18380 transitions. [2022-11-16 19:50:09,505 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 18380 transitions. Word has length 9 [2022-11-16 19:50:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:09,505 INFO L495 AbstractCegarLoop]: Abstraction has 4570 states and 18380 transitions. [2022-11-16 19:50:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 18380 transitions. [2022-11-16 19:50:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:09,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:09,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:09,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:09,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:09,708 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:09,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1801196405, now seen corresponding path program 1 times [2022-11-16 19:50:09,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:09,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532148551] [2022-11-16 19:50:09,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:09,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:09,710 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:09,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 19:50:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:09,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 19:50:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:09,974 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:50:09,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:50:10,013 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:50:10,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:50:10,039 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:10,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:50:10,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:10,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:10,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532148551] [2022-11-16 19:50:10,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532148551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:10,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:10,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:50:10,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73525309] [2022-11-16 19:50:10,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:10,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:10,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:10,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:10,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:10,057 INFO L87 Difference]: Start difference. First operand 4570 states and 18380 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:10,458 INFO L93 Difference]: Finished difference Result 3587 states and 14470 transitions. [2022-11-16 19:50:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:50:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:10,469 INFO L225 Difference]: With dead ends: 3587 [2022-11-16 19:50:10,469 INFO L226 Difference]: Without dead ends: 3587 [2022-11-16 19:50:10,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:10,469 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:10,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:50:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2022-11-16 19:50:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3587. [2022-11-16 19:50:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3265 states have (on average 4.431852986217458) internal successors, (14470), 3586 states have internal predecessors, (14470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 14470 transitions. [2022-11-16 19:50:10,533 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 14470 transitions. Word has length 9 [2022-11-16 19:50:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:10,533 INFO L495 AbstractCegarLoop]: Abstraction has 3587 states and 14470 transitions. [2022-11-16 19:50:10,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 14470 transitions. [2022-11-16 19:50:10,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:10,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:10,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:10,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-16 19:50:10,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:10,734 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:10,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1801196406, now seen corresponding path program 1 times [2022-11-16 19:50:10,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:10,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [812356948] [2022-11-16 19:50:10,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:10,736 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:50:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:11,083 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:50:11,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:50:11,217 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:50:11,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:50:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:11,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:11,394 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:50:11,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:50:11,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:11,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:11,479 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:11,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:18,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:18,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:18,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [812356948] [2022-11-16 19:50:18,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [812356948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:18,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1708779825] [2022-11-16 19:50:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:18,496 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:50:18,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:50:18,497 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:50:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-16 19:50:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:18,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:50:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:18,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:50:18,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:50:19,089 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:50:19,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:50:19,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:19,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:19,318 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:50:19,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:50:19,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:19,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:19,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:19,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:19,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1708779825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601598895] [2022-11-16 19:50:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:20,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:20,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:20,355 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:20,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 19:50:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:20,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:50:20,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:20,631 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:50:20,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:50:20,763 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:50:20,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:50:20,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:20,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:20,843 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:20,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:20,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:23,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:50:23,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-16 19:50:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:31,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601598895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:31,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:50:31,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-16 19:50:31,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849046839] [2022-11-16 19:50:31,237 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:50:31,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:50:31,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:31,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:50:31,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=188, Unknown=2, NotChecked=0, Total=240 [2022-11-16 19:50:31,238 INFO L87 Difference]: Start difference. First operand 3587 states and 14470 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:33,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:33,056 INFO L93 Difference]: Finished difference Result 6396 states and 25434 transitions. [2022-11-16 19:50:33,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:50:33,057 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:33,077 INFO L225 Difference]: With dead ends: 6396 [2022-11-16 19:50:33,077 INFO L226 Difference]: Without dead ends: 6396 [2022-11-16 19:50:33,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=103, Invalid=315, Unknown=2, NotChecked=0, Total=420 [2022-11-16 19:50:33,078 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 122 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:33,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 1 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 336 Invalid, 0 Unknown, 778 Unchecked, 1.4s Time] [2022-11-16 19:50:33,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6396 states. [2022-11-16 19:50:33,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6396 to 3602. [2022-11-16 19:50:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3280 states have (on average 4.422560975609756) internal successors, (14506), 3601 states have internal predecessors, (14506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 14506 transitions. [2022-11-16 19:50:33,169 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 14506 transitions. Word has length 9 [2022-11-16 19:50:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:33,169 INFO L495 AbstractCegarLoop]: Abstraction has 3602 states and 14506 transitions. [2022-11-16 19:50:33,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 14506 transitions. [2022-11-16 19:50:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:33,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:33,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:33,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-16 19:50:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:33,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:33,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:33,771 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1801196618, now seen corresponding path program 1 times [2022-11-16 19:50:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757117822] [2022-11-16 19:50:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:33,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:33,772 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:33,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:50:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:50:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:33,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:50:33,996 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:50:33,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:50:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:50:34,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:50:34,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:34,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757117822] [2022-11-16 19:50:34,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757117822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:50:34,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:50:34,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:50:34,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588531774] [2022-11-16 19:50:34,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:50:34,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:50:34,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:34,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:50:34,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:50:34,019 INFO L87 Difference]: Start difference. First operand 3602 states and 14506 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:34,383 INFO L93 Difference]: Finished difference Result 2764 states and 11097 transitions. [2022-11-16 19:50:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:50:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 19:50:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:34,391 INFO L225 Difference]: With dead ends: 2764 [2022-11-16 19:50:34,391 INFO L226 Difference]: Without dead ends: 2764 [2022-11-16 19:50:34,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:50:34,392 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:34,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:50:34,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2022-11-16 19:50:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2022-11-16 19:50:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2582 states have (on average 4.2978311386522074) internal successors, (11097), 2763 states have internal predecessors, (11097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 11097 transitions. [2022-11-16 19:50:34,443 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 11097 transitions. Word has length 9 [2022-11-16 19:50:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:34,443 INFO L495 AbstractCegarLoop]: Abstraction has 2764 states and 11097 transitions. [2022-11-16 19:50:34,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 11097 transitions. [2022-11-16 19:50:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 19:50:34,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:34,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:50:34,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:34,644 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1801196619, now seen corresponding path program 1 times [2022-11-16 19:50:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:34,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608376862] [2022-11-16 19:50:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:34,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:34,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:34,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:34,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 19:50:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:50:34,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:34,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:50:34,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:34,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:35,001 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:35,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:35,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:35,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:35,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608376862] [2022-11-16 19:50:35,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608376862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1833734866] [2022-11-16 19:50:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:35,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:50:35,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:50:35,631 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:50:35,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-16 19:50:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:50:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:36,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:36,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:50:36,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:36,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:36,220 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:36,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:36,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:36,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1833734866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:36,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469960412] [2022-11-16 19:50:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:36,501 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:36,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 19:50:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:50:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:36,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:50:36,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:36,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:50:36,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:50:36,784 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:50:36,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:50:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:36,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:50:37,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469960412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:37,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:50:37,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-16 19:50:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788657263] [2022-11-16 19:50:37,044 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:50:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:50:37,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:50:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:50:37,045 INFO L87 Difference]: Start difference. First operand 2764 states and 11097 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:50:39,090 INFO L93 Difference]: Finished difference Result 5411 states and 21195 transitions. [2022-11-16 19:50:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:50:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 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 9 [2022-11-16 19:50:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:50:39,106 INFO L225 Difference]: With dead ends: 5411 [2022-11-16 19:50:39,106 INFO L226 Difference]: Without dead ends: 5411 [2022-11-16 19:50:39,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:50:39,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:50:39,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 393 Invalid, 0 Unknown, 331 Unchecked, 1.9s Time] [2022-11-16 19:50:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2022-11-16 19:50:39,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 2967. [2022-11-16 19:50:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2785 states have (on average 4.265709156193896) internal successors, (11880), 2966 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 11880 transitions. [2022-11-16 19:50:39,216 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 11880 transitions. Word has length 9 [2022-11-16 19:50:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:50:39,216 INFO L495 AbstractCegarLoop]: Abstraction has 2967 states and 11880 transitions. [2022-11-16 19:50:39,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 11880 transitions. [2022-11-16 19:50:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:50:39,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:50:39,217 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1] [2022-11-16 19:50:39,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-11-16 19:50:39,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-11-16 19:50:39,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 19:50:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:39,818 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:50:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:50:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -131771255, now seen corresponding path program 1 times [2022-11-16 19:50:39,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:50:39,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460322463] [2022-11-16 19:50:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:39,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:50:39,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:50:39,821 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:50:39,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 19:50:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:39,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:50:39,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:39,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:40,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:42,462 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:50:42,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460322463] [2022-11-16 19:50:42,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460322463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614338858] [2022-11-16 19:50:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:50:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:50:42,464 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:50:42,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-16 19:50:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:42,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:50:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:42,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:43,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:45,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614338858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786499922] [2022-11-16 19:50:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:50:45,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:50:45,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:50:45,510 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:50:45,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-16 19:50:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:50:45,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:50:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:50:45,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:50:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:46,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:50:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:50:46,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786499922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:50:46,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:50:46,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-11-16 19:50:46,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577051734] [2022-11-16 19:50:46,617 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:50:46,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 19:50:46,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:50:46,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 19:50:46,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 19:50:46,619 INFO L87 Difference]: Start difference. First operand 2967 states and 11880 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:50:53,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:50:55,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:50:56,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:50:57,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:50:59,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:01,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:03,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:05,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:07,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:08,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:10,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:12,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:14,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:19,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:21,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:22,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:24,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:26,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:28,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:30,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:34,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:36,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:37,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:39,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:41,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:43,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:45,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:47,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:49,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:51,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:53,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:54,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:57,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:51:59,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:52:02,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:52:06,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:52:10,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:52:13,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:52:25,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:25,963 INFO L93 Difference]: Finished difference Result 31546 states and 128129 transitions. [2022-11-16 19:52:25,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:52:25,965 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:52:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:26,100 INFO L225 Difference]: With dead ends: 31546 [2022-11-16 19:52:26,100 INFO L226 Difference]: Without dead ends: 31546 [2022-11-16 19:52:26,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=797, Invalid=1653, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 19:52:26,101 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3025 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6755 mSolverCounterSat, 387 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3025 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 6755 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:26,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3025 Valid, 0 Invalid, 7162 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [387 Valid, 6755 Invalid, 20 Unknown, 0 Unchecked, 91.4s Time] [2022-11-16 19:52:26,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31546 states. [2022-11-16 19:52:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31546 to 2990. [2022-11-16 19:52:26,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2808 states have (on average 4.243589743589744) internal successors, (11916), 2989 states have internal predecessors, (11916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 11916 transitions. [2022-11-16 19:52:26,383 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 11916 transitions. Word has length 10 [2022-11-16 19:52:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:26,383 INFO L495 AbstractCegarLoop]: Abstraction has 2990 states and 11916 transitions. [2022-11-16 19:52:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 11916 transitions. [2022-11-16 19:52:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:26,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:26,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:26,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:26,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:26,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:26,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:26,985 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:26,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1975468191, now seen corresponding path program 1 times [2022-11-16 19:52:26,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:26,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1642596029] [2022-11-16 19:52:26,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:26,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:26,987 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:26,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 19:52:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:27,290 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:27,290 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 33 treesize of output 44 [2022-11-16 19:52:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:27,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:27,387 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:27,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:27,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:27,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:27,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1642596029] [2022-11-16 19:52:27,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1642596029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:27,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:27,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:27,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120382376] [2022-11-16 19:52:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:27,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:27,465 INFO L87 Difference]: Start difference. First operand 2990 states and 11916 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:27,864 INFO L93 Difference]: Finished difference Result 2988 states and 11906 transitions. [2022-11-16 19:52:27,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:27,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:27,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:27,873 INFO L225 Difference]: With dead ends: 2988 [2022-11-16 19:52:27,873 INFO L226 Difference]: Without dead ends: 2988 [2022-11-16 19:52:27,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:27,874 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:27,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2022-11-16 19:52:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 2980. [2022-11-16 19:52:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2980 states, 2798 states have (on average 4.246604717655468) internal successors, (11882), 2979 states have internal predecessors, (11882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2980 states to 2980 states and 11882 transitions. [2022-11-16 19:52:27,944 INFO L78 Accepts]: Start accepts. Automaton has 2980 states and 11882 transitions. Word has length 10 [2022-11-16 19:52:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:27,944 INFO L495 AbstractCegarLoop]: Abstraction has 2980 states and 11882 transitions. [2022-11-16 19:52:27,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2980 states and 11882 transitions. [2022-11-16 19:52:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:27,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:27,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:27,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:28,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:28,145 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -988973463, now seen corresponding path program 1 times [2022-11-16 19:52:28,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954763830] [2022-11-16 19:52:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:28,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:28,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:28,147 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:28,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 19:52:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:28,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:28,430 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:28,430 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 33 treesize of output 44 [2022-11-16 19:52:28,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:28,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:28,528 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:28,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:28,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:28,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:28,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954763830] [2022-11-16 19:52:28,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954763830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:28,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:28,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387919670] [2022-11-16 19:52:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:28,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:28,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:28,598 INFO L87 Difference]: Start difference. First operand 2980 states and 11882 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:28,981 INFO L93 Difference]: Finished difference Result 2991 states and 11911 transitions. [2022-11-16 19:52:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:28,990 INFO L225 Difference]: With dead ends: 2991 [2022-11-16 19:52:28,991 INFO L226 Difference]: Without dead ends: 2991 [2022-11-16 19:52:28,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:28,991 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:28,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-16 19:52:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2022-11-16 19:52:29,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 2991. [2022-11-16 19:52:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2991 states, 2809 states have (on average 4.240299038803845) internal successors, (11911), 2990 states have internal predecessors, (11911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2991 states to 2991 states and 11911 transitions. [2022-11-16 19:52:29,078 INFO L78 Accepts]: Start accepts. Automaton has 2991 states and 11911 transitions. Word has length 10 [2022-11-16 19:52:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:29,078 INFO L495 AbstractCegarLoop]: Abstraction has 2991 states and 11911 transitions. [2022-11-16 19:52:29,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2991 states and 11911 transitions. [2022-11-16 19:52:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:29,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:29,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:29,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:29,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:29,280 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:29,280 INFO L85 PathProgramCache]: Analyzing trace with hash -989837402, now seen corresponding path program 1 times [2022-11-16 19:52:29,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:29,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152942017] [2022-11-16 19:52:29,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:29,281 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:29,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:29,282 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:29,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 19:52:29,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:29,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:29,552 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:29,552 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 33 treesize of output 44 [2022-11-16 19:52:29,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:29,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:29,648 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:29,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:29,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:29,717 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:29,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152942017] [2022-11-16 19:52:29,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152942017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:29,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:29,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:29,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583337872] [2022-11-16 19:52:29,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:29,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:29,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:29,719 INFO L87 Difference]: Start difference. First operand 2991 states and 11911 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:30,092 INFO L93 Difference]: Finished difference Result 2997 states and 11936 transitions. [2022-11-16 19:52:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:30,101 INFO L225 Difference]: With dead ends: 2997 [2022-11-16 19:52:30,101 INFO L226 Difference]: Without dead ends: 2997 [2022-11-16 19:52:30,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:30,102 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:30,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-11-16 19:52:30,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2997 states. [2022-11-16 19:52:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2997 to 2997. [2022-11-16 19:52:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2997 states, 2815 states have (on average 4.2401420959147424) internal successors, (11936), 2996 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:30,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2997 states to 2997 states and 11936 transitions. [2022-11-16 19:52:30,157 INFO L78 Accepts]: Start accepts. Automaton has 2997 states and 11936 transitions. Word has length 10 [2022-11-16 19:52:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:30,158 INFO L495 AbstractCegarLoop]: Abstraction has 2997 states and 11936 transitions. [2022-11-16 19:52:30,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2997 states and 11936 transitions. [2022-11-16 19:52:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:30,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:30,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:30,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:30,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:30,363 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -988190011, now seen corresponding path program 1 times [2022-11-16 19:52:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451015807] [2022-11-16 19:52:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:30,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:30,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:30,364 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:30,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 19:52:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:52:30,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:30,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:30,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:30,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451015807] [2022-11-16 19:52:30,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451015807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:30,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:30,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:52:30,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443478229] [2022-11-16 19:52:30,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:30,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:52:30,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:52:30,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:30,665 INFO L87 Difference]: Start difference. First operand 2997 states and 11936 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:31,740 INFO L93 Difference]: Finished difference Result 3987 states and 15336 transitions. [2022-11-16 19:52:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:31,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 10 [2022-11-16 19:52:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:31,754 INFO L225 Difference]: With dead ends: 3987 [2022-11-16 19:52:31,754 INFO L226 Difference]: Without dead ends: 3987 [2022-11-16 19:52:31,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:52:31,755 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 103 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 5 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:52:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3987 states. [2022-11-16 19:52:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3987 to 3305. [2022-11-16 19:52:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3123 states have (on average 4.242395132885046) internal successors, (13249), 3304 states have internal predecessors, (13249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 13249 transitions. [2022-11-16 19:52:31,826 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 13249 transitions. Word has length 10 [2022-11-16 19:52:31,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:31,826 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 13249 transitions. [2022-11-16 19:52:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 13249 transitions. [2022-11-16 19:52:31,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:31,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:31,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:31,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:32,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:32,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:32,029 INFO L85 PathProgramCache]: Analyzing trace with hash -988189845, now seen corresponding path program 1 times [2022-11-16 19:52:32,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:32,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731815895] [2022-11-16 19:52:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:32,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:32,030 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:32,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 19:52:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:32,306 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:32,306 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 33 treesize of output 44 [2022-11-16 19:52:32,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:32,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:32,407 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:32,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:32,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:32,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:32,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731815895] [2022-11-16 19:52:32,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731815895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:32,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:32,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259355581] [2022-11-16 19:52:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:32,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:32,482 INFO L87 Difference]: Start difference. First operand 3305 states and 13249 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:32,911 INFO L93 Difference]: Finished difference Result 3305 states and 13249 transitions. [2022-11-16 19:52:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:32,923 INFO L225 Difference]: With dead ends: 3305 [2022-11-16 19:52:32,923 INFO L226 Difference]: Without dead ends: 3305 [2022-11-16 19:52:32,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:32,924 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:32,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2022-11-16 19:52:32,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3304. [2022-11-16 19:52:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3304 states, 3122 states have (on average 4.242472773862908) internal successors, (13245), 3303 states have internal predecessors, (13245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3304 states to 3304 states and 13245 transitions. [2022-11-16 19:52:33,013 INFO L78 Accepts]: Start accepts. Automaton has 3304 states and 13245 transitions. Word has length 10 [2022-11-16 19:52:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:33,013 INFO L495 AbstractCegarLoop]: Abstraction has 3304 states and 13245 transitions. [2022-11-16 19:52:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3304 states and 13245 transitions. [2022-11-16 19:52:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:33,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:33,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:33,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:33,227 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:33,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:33,228 INFO L85 PathProgramCache]: Analyzing trace with hash -988188698, now seen corresponding path program 1 times [2022-11-16 19:52:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:33,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [750147447] [2022-11-16 19:52:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:33,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:33,229 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:33,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 19:52:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:52:33,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:33,505 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:33,506 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 33 treesize of output 44 [2022-11-16 19:52:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:33,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:33,614 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:33,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:33,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:33,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:33,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [750147447] [2022-11-16 19:52:33,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [750147447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:33,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:33,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:33,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13433833] [2022-11-16 19:52:33,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:33,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:33,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:33,686 INFO L87 Difference]: Start difference. First operand 3304 states and 13245 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:34,107 INFO L93 Difference]: Finished difference Result 3306 states and 13251 transitions. [2022-11-16 19:52:34,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:34,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:34,118 INFO L225 Difference]: With dead ends: 3306 [2022-11-16 19:52:34,119 INFO L226 Difference]: Without dead ends: 3306 [2022-11-16 19:52:34,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:34,119 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:34,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2022-11-16 19:52:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3301. [2022-11-16 19:52:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3119 states have (on average 4.243667842257134) internal successors, (13236), 3300 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 13236 transitions. [2022-11-16 19:52:34,184 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 13236 transitions. Word has length 10 [2022-11-16 19:52:34,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:34,184 INFO L495 AbstractCegarLoop]: Abstraction has 3301 states and 13236 transitions. [2022-11-16 19:52:34,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 13236 transitions. [2022-11-16 19:52:34,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:34,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:34,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:34,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:34,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:34,387 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:34,387 INFO L85 PathProgramCache]: Analyzing trace with hash 767349799, now seen corresponding path program 1 times [2022-11-16 19:52:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:34,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765268175] [2022-11-16 19:52:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:34,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:34,388 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:34,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 19:52:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:34,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:52:34,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:34,664 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:34,664 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 33 treesize of output 44 [2022-11-16 19:52:34,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:34,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:34,772 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:34,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:34,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:34,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765268175] [2022-11-16 19:52:34,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765268175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:34,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:34,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:34,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047262380] [2022-11-16 19:52:34,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:34,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:34,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:34,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:34,849 INFO L87 Difference]: Start difference. First operand 3301 states and 13236 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:35,240 INFO L93 Difference]: Finished difference Result 3311 states and 13258 transitions. [2022-11-16 19:52:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:35,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:35,250 INFO L225 Difference]: With dead ends: 3311 [2022-11-16 19:52:35,251 INFO L226 Difference]: Without dead ends: 3311 [2022-11-16 19:52:35,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:35,251 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:35,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2022-11-16 19:52:35,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 3301. [2022-11-16 19:52:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3119 states have (on average 4.243667842257134) internal successors, (13236), 3300 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 13236 transitions. [2022-11-16 19:52:35,317 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 13236 transitions. Word has length 10 [2022-11-16 19:52:35,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:35,317 INFO L495 AbstractCegarLoop]: Abstraction has 3301 states and 13236 transitions. [2022-11-16 19:52:35,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:35,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 13236 transitions. [2022-11-16 19:52:35,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:35,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:35,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:35,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:35,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:35,521 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:35,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:35,521 INFO L85 PathProgramCache]: Analyzing trace with hash 766485860, now seen corresponding path program 1 times [2022-11-16 19:52:35,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:35,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988481575] [2022-11-16 19:52:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:35,522 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:35,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:35,523 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:35,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 19:52:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:35,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:35,808 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:35,808 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 33 treesize of output 44 [2022-11-16 19:52:35,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:35,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:35,899 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:35,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:35,976 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:35,976 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:35,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988481575] [2022-11-16 19:52:35,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988481575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:35,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:35,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565203845] [2022-11-16 19:52:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:35,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:35,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:35,978 INFO L87 Difference]: Start difference. First operand 3301 states and 13236 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:36,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:36,397 INFO L93 Difference]: Finished difference Result 3307 states and 13252 transitions. [2022-11-16 19:52:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:36,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:36,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:36,408 INFO L225 Difference]: With dead ends: 3307 [2022-11-16 19:52:36,408 INFO L226 Difference]: Without dead ends: 3307 [2022-11-16 19:52:36,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:36,409 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:36,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2022-11-16 19:52:36,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3297. [2022-11-16 19:52:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3297 states, 3115 states have (on average 4.245264847512039) internal successors, (13224), 3296 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:36,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3297 states to 3297 states and 13224 transitions. [2022-11-16 19:52:36,470 INFO L78 Accepts]: Start accepts. Automaton has 3297 states and 13224 transitions. Word has length 10 [2022-11-16 19:52:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:36,471 INFO L495 AbstractCegarLoop]: Abstraction has 3297 states and 13224 transitions. [2022-11-16 19:52:36,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:36,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3297 states and 13224 transitions. [2022-11-16 19:52:36,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:36,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:36,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:36,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 19:52:36,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:36,672 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:36,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:36,673 INFO L85 PathProgramCache]: Analyzing trace with hash 768133417, now seen corresponding path program 1 times [2022-11-16 19:52:36,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:36,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869163222] [2022-11-16 19:52:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:36,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:36,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:36,674 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:36,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 19:52:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:36,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:36,961 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:36,962 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 33 treesize of output 44 [2022-11-16 19:52:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:37,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:37,055 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:37,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:37,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:37,136 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:37,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869163222] [2022-11-16 19:52:37,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869163222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:37,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:37,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:37,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261356436] [2022-11-16 19:52:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:37,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:37,138 INFO L87 Difference]: Start difference. First operand 3297 states and 13224 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:37,538 INFO L93 Difference]: Finished difference Result 3301 states and 13236 transitions. [2022-11-16 19:52:37,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:37,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:37,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:37,549 INFO L225 Difference]: With dead ends: 3301 [2022-11-16 19:52:37,549 INFO L226 Difference]: Without dead ends: 3301 [2022-11-16 19:52:37,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:37,549 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:37,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-11-16 19:52:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 3295. [2022-11-16 19:52:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3113 states have (on average 4.245422422100868) internal successors, (13216), 3294 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 13216 transitions. [2022-11-16 19:52:37,610 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 13216 transitions. Word has length 10 [2022-11-16 19:52:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:37,611 INFO L495 AbstractCegarLoop]: Abstraction has 3295 states and 13216 transitions. [2022-11-16 19:52:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 13216 transitions. [2022-11-16 19:52:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:37,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:37,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:37,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:37,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:37,812 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash 768134564, now seen corresponding path program 1 times [2022-11-16 19:52:37,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:37,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899707729] [2022-11-16 19:52:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:37,813 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 [2022-11-16 19:52:37,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:37,814 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:37,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 19:52:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:38,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:38,111 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:38,112 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 33 treesize of output 44 [2022-11-16 19:52:38,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:38,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:38,211 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:38,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:38,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:38,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899707729] [2022-11-16 19:52:38,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899707729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:38,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:38,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478217537] [2022-11-16 19:52:38,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:38,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:38,297 INFO L87 Difference]: Start difference. First operand 3295 states and 13216 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:38,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:38,694 INFO L93 Difference]: Finished difference Result 3301 states and 13234 transitions. [2022-11-16 19:52:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:38,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:38,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:38,705 INFO L225 Difference]: With dead ends: 3301 [2022-11-16 19:52:38,705 INFO L226 Difference]: Without dead ends: 3301 [2022-11-16 19:52:38,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:38,706 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:38,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-11-16 19:52:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 3291. [2022-11-16 19:52:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3291 states, 3109 states have (on average 4.247024766806047) internal successors, (13204), 3290 states have internal predecessors, (13204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 13204 transitions. [2022-11-16 19:52:38,777 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 13204 transitions. Word has length 10 [2022-11-16 19:52:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:38,778 INFO L495 AbstractCegarLoop]: Abstraction has 3291 states and 13204 transitions. [2022-11-16 19:52:38,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 13204 transitions. [2022-11-16 19:52:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:38,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:38,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:38,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-16 19:52:38,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:38,979 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:38,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash -935244641, now seen corresponding path program 1 times [2022-11-16 19:52:38,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124352821] [2022-11-16 19:52:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:38,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:38,981 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:38,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 19:52:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:39,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:39,237 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:39,238 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 33 treesize of output 44 [2022-11-16 19:52:39,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:39,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:39,328 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:39,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:39,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:39,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124352821] [2022-11-16 19:52:39,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124352821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:39,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:39,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718686923] [2022-11-16 19:52:39,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:39,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:39,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:39,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:39,413 INFO L87 Difference]: Start difference. First operand 3291 states and 13204 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:39,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:39,836 INFO L93 Difference]: Finished difference Result 3300 states and 13227 transitions. [2022-11-16 19:52:39,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:39,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:39,847 INFO L225 Difference]: With dead ends: 3300 [2022-11-16 19:52:39,847 INFO L226 Difference]: Without dead ends: 3300 [2022-11-16 19:52:39,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:39,847 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:39,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2022-11-16 19:52:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3300. [2022-11-16 19:52:39,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3300 states, 3118 states have (on average 4.2421423989737015) internal successors, (13227), 3299 states have internal predecessors, (13227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3300 states to 3300 states and 13227 transitions. [2022-11-16 19:52:39,911 INFO L78 Accepts]: Start accepts. Automaton has 3300 states and 13227 transitions. Word has length 10 [2022-11-16 19:52:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:39,912 INFO L495 AbstractCegarLoop]: Abstraction has 3300 states and 13227 transitions. [2022-11-16 19:52:39,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:39,912 INFO L276 IsEmpty]: Start isEmpty. Operand 3300 states and 13227 transitions. [2022-11-16 19:52:39,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:39,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:39,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:39,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:40,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:40,113 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:40,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:40,113 INFO L85 PathProgramCache]: Analyzing trace with hash -935243494, now seen corresponding path program 1 times [2022-11-16 19:52:40,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:40,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339580714] [2022-11-16 19:52:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:40,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:40,114 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:40,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 19:52:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:40,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:40,377 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:40,377 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 33 treesize of output 44 [2022-11-16 19:52:40,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:40,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:40,463 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:40,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:40,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:40,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:40,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339580714] [2022-11-16 19:52:40,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339580714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:40,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:40,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:40,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320294277] [2022-11-16 19:52:40,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:40,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:40,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:40,547 INFO L87 Difference]: Start difference. First operand 3300 states and 13227 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:40,939 INFO L93 Difference]: Finished difference Result 3302 states and 13231 transitions. [2022-11-16 19:52:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:40,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:40,948 INFO L225 Difference]: With dead ends: 3302 [2022-11-16 19:52:40,948 INFO L226 Difference]: Without dead ends: 3302 [2022-11-16 19:52:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:40,949 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:40,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:40,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2022-11-16 19:52:40,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 3302. [2022-11-16 19:52:40,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3120 states have (on average 4.2407051282051285) internal successors, (13231), 3301 states have internal predecessors, (13231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 13231 transitions. [2022-11-16 19:52:41,009 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 13231 transitions. Word has length 10 [2022-11-16 19:52:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:41,009 INFO L495 AbstractCegarLoop]: Abstraction has 3302 states and 13231 transitions. [2022-11-16 19:52:41,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 13231 transitions. [2022-11-16 19:52:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:41,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:41,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:41,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:41,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:41,210 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:41,210 INFO L85 PathProgramCache]: Analyzing trace with hash -960635625, now seen corresponding path program 1 times [2022-11-16 19:52:41,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:41,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642277110] [2022-11-16 19:52:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:41,212 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:41,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 19:52:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:41,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:41,469 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:41,470 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 33 treesize of output 44 [2022-11-16 19:52:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:41,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:41,566 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:41,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:41,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:41,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:41,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642277110] [2022-11-16 19:52:41,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642277110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:41,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:41,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:41,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739566041] [2022-11-16 19:52:41,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:41,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:41,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:41,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:41,643 INFO L87 Difference]: Start difference. First operand 3302 states and 13231 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:42,077 INFO L93 Difference]: Finished difference Result 3308 states and 13244 transitions. [2022-11-16 19:52:42,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:42,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:42,094 INFO L225 Difference]: With dead ends: 3308 [2022-11-16 19:52:42,094 INFO L226 Difference]: Without dead ends: 3308 [2022-11-16 19:52:42,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:42,095 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:42,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-11-16 19:52:42,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3305. [2022-11-16 19:52:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 3123 states have (on average 4.239193083573487) internal successors, (13239), 3304 states have internal predecessors, (13239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 13239 transitions. [2022-11-16 19:52:42,161 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 13239 transitions. Word has length 10 [2022-11-16 19:52:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 13239 transitions. [2022-11-16 19:52:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 13239 transitions. [2022-11-16 19:52:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:42,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:42,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:42,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:42,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:42,363 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:42,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:42,363 INFO L85 PathProgramCache]: Analyzing trace with hash -962026750, now seen corresponding path program 1 times [2022-11-16 19:52:42,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:42,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134439391] [2022-11-16 19:52:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:42,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:42,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:42,365 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:42,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 19:52:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:52:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:42,622 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:42,623 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 33 treesize of output 44 [2022-11-16 19:52:42,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:42,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:42,719 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:42,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:42,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:42,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:42,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134439391] [2022-11-16 19:52:42,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134439391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:42,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:42,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251707663] [2022-11-16 19:52:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:42,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:42,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:42,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:42,831 INFO L87 Difference]: Start difference. First operand 3305 states and 13239 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:43,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:43,230 INFO L93 Difference]: Finished difference Result 3306 states and 13242 transitions. [2022-11-16 19:52:43,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:43,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:43,240 INFO L225 Difference]: With dead ends: 3306 [2022-11-16 19:52:43,240 INFO L226 Difference]: Without dead ends: 3306 [2022-11-16 19:52:43,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:43,241 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:43,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:43,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2022-11-16 19:52:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3306. [2022-11-16 19:52:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 3124 states have (on average 4.238796414852753) internal successors, (13242), 3305 states have internal predecessors, (13242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:43,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 13242 transitions. [2022-11-16 19:52:43,307 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 13242 transitions. Word has length 10 [2022-11-16 19:52:43,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:43,308 INFO L495 AbstractCegarLoop]: Abstraction has 3306 states and 13242 transitions. [2022-11-16 19:52:43,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:43,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 13242 transitions. [2022-11-16 19:52:43,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:43,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:43,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:43,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-16 19:52:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:43,509 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:43,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:43,509 INFO L85 PathProgramCache]: Analyzing trace with hash -962025603, now seen corresponding path program 1 times [2022-11-16 19:52:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:43,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649280508] [2022-11-16 19:52:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:43,510 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:43,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:43,511 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:43,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 19:52:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:43,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:43,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:43,778 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:43,779 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 33 treesize of output 44 [2022-11-16 19:52:43,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:43,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:43,880 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:43,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:43,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:43,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:43,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649280508] [2022-11-16 19:52:43,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649280508] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:43,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:43,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:43,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853401293] [2022-11-16 19:52:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:43,974 INFO L87 Difference]: Start difference. First operand 3306 states and 13242 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:44,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:44,410 INFO L93 Difference]: Finished difference Result 3307 states and 13244 transitions. [2022-11-16 19:52:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:44,421 INFO L225 Difference]: With dead ends: 3307 [2022-11-16 19:52:44,422 INFO L226 Difference]: Without dead ends: 3307 [2022-11-16 19:52:44,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:44,422 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:44,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2022-11-16 19:52:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3307. [2022-11-16 19:52:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3125 states have (on average 4.23808) internal successors, (13244), 3306 states have internal predecessors, (13244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 13244 transitions. [2022-11-16 19:52:44,490 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 13244 transitions. Word has length 10 [2022-11-16 19:52:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:44,490 INFO L495 AbstractCegarLoop]: Abstraction has 3307 states and 13244 transitions. [2022-11-16 19:52:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 13244 transitions. [2022-11-16 19:52:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:44,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:44,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:44,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:44,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:44,692 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -910948763, now seen corresponding path program 1 times [2022-11-16 19:52:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383745963] [2022-11-16 19:52:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:44,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:44,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:44,693 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:44,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 19:52:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:52:44,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:44,960 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:52:44,961 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 33 treesize of output 44 [2022-11-16 19:52:45,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:45,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:45,049 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:52:45,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:52:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:52:45,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:52:45,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:45,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383745963] [2022-11-16 19:52:45,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383745963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:52:45,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:52:45,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:52:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998088552] [2022-11-16 19:52:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:52:45,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:52:45,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:52:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:52:45,134 INFO L87 Difference]: Start difference. First operand 3307 states and 13244 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:45,537 INFO L93 Difference]: Finished difference Result 3308 states and 13247 transitions. [2022-11-16 19:52:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:52:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 10 [2022-11-16 19:52:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:45,548 INFO L225 Difference]: With dead ends: 3308 [2022-11-16 19:52:45,548 INFO L226 Difference]: Without dead ends: 3308 [2022-11-16 19:52:45,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:52:45,549 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:45,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:52:45,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2022-11-16 19:52:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 3307. [2022-11-16 19:52:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 3125 states have (on average 4.23808) internal successors, (13244), 3306 states have internal predecessors, (13244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 13244 transitions. [2022-11-16 19:52:45,612 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 13244 transitions. Word has length 10 [2022-11-16 19:52:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:45,613 INFO L495 AbstractCegarLoop]: Abstraction has 3307 states and 13244 transitions. [2022-11-16 19:52:45,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 13244 transitions. [2022-11-16 19:52:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:45,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:45,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:45,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:45,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:45,823 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -40371275, now seen corresponding path program 1 times [2022-11-16 19:52:45,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:45,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895733301] [2022-11-16 19:52:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:45,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:45,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:45,824 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:45,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 19:52:46,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:46,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:52:46,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:46,240 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:52:46,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:52:46,393 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:52:46,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:52:46,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:46,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:52:46,540 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:52:46,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:52:46,612 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:52:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:52:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:46,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:48,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895733301] [2022-11-16 19:52:48,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895733301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:48,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1228409372] [2022-11-16 19:52:48,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:48,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:52:48,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:52:48,309 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:52:48,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-16 19:52:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:52:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:48,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:52:48,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:52:49,001 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:52:49,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:52:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:49,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:52:49,233 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:52:49,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:52:49,294 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:52:49,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:52:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:49,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:50,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1228409372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:50,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152694407] [2022-11-16 19:52:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:50,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:50,344 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:50,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 19:52:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:50,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:52:50,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:50,735 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:52:50,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:52:50,893 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:52:50,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:52:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:50,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:52:50,980 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:52:50,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:52:51,062 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:52:51,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:52:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:51,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:52:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152694407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:51,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:52:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 17 [2022-11-16 19:52:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057334453] [2022-11-16 19:52:51,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:52:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 19:52:51,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:52:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 19:52:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:52:51,984 INFO L87 Difference]: Start difference. First operand 3307 states and 13244 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:52:54,685 INFO L93 Difference]: Finished difference Result 4955 states and 19618 transitions. [2022-11-16 19:52:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:52:54,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:52:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:52:54,701 INFO L225 Difference]: With dead ends: 4955 [2022-11-16 19:52:54,701 INFO L226 Difference]: Without dead ends: 4955 [2022-11-16 19:52:54,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:52:54,702 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 133 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:52:54,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 1 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 538 Unchecked, 2.4s Time] [2022-11-16 19:52:54,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2022-11-16 19:52:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 3332. [2022-11-16 19:52:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3150 states have (on average 4.221269841269841) internal successors, (13297), 3331 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:54,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 13297 transitions. [2022-11-16 19:52:54,776 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 13297 transitions. Word has length 10 [2022-11-16 19:52:54,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:52:54,777 INFO L495 AbstractCegarLoop]: Abstraction has 3332 states and 13297 transitions. [2022-11-16 19:52:54,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:52:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 13297 transitions. [2022-11-16 19:52:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:52:54,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:52:54,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:52:54,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 19:52:54,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-16 19:52:55,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-16 19:52:55,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:55,380 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:52:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:52:55,381 INFO L85 PathProgramCache]: Analyzing trace with hash -40371062, now seen corresponding path program 1 times [2022-11-16 19:52:55,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:52:55,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247165286] [2022-11-16 19:52:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:55,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:52:55,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:52:55,382 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:52:55,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 19:52:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:52:55,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:55,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:52:55,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:52:55,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:55,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:52:55,789 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:52:55,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:52:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:55,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:58,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:52:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247165286] [2022-11-16 19:52:58,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247165286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:58,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1447143054] [2022-11-16 19:52:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:58,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:52:58,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:52:58,478 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:52:58,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-16 19:52:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:58,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:52:58,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:58,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:52:58,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:52:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:52:59,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:52:59,096 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:52:59,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:52:59,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:59,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:52:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:52:59,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1447143054] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:52:59,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128690145] [2022-11-16 19:52:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:52:59,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:52:59,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:52:59,355 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:52:59,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-16 19:52:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:52:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:52:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:52:59,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:52:59,722 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:52:59,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:53:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:00,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:01,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128690145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:01,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:53:01,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-16 19:53:01,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381562681] [2022-11-16 19:53:01,863 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:01,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:53:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:53:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:53:01,864 INFO L87 Difference]: Start difference. First operand 3332 states and 13297 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:10,518 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:53:11,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:11,043 INFO L93 Difference]: Finished difference Result 3409 states and 13464 transitions. [2022-11-16 19:53:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:53:11,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:53:11,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:11,054 INFO L225 Difference]: With dead ends: 3409 [2022-11-16 19:53:11,054 INFO L226 Difference]: Without dead ends: 3409 [2022-11-16 19:53:11,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:53:11,054 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:11,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 187 Unchecked, 0.3s Time] [2022-11-16 19:53:11,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2022-11-16 19:53:11,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3350. [2022-11-16 19:53:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3168 states have (on average 4.209911616161616) internal successors, (13337), 3349 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 13337 transitions. [2022-11-16 19:53:11,115 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 13337 transitions. Word has length 10 [2022-11-16 19:53:11,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:11,115 INFO L495 AbstractCegarLoop]: Abstraction has 3350 states and 13337 transitions. [2022-11-16 19:53:11,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 13337 transitions. [2022-11-16 19:53:11,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:53:11,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:11,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:11,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:11,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:11,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-16 19:53:11,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:11,730 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:11,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2523053, now seen corresponding path program 1 times [2022-11-16 19:53:11,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:11,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10294738] [2022-11-16 19:53:11,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:11,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:11,732 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:11,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 19:53:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:12,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:53:12,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:12,161 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:53:12,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:53:12,303 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:53:12,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:53:12,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:53:12,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:53:12,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:12,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:12,551 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:12,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:12,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:18,460 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:18,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10294738] [2022-11-16 19:53:18,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10294738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:18,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1018288979] [2022-11-16 19:53:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:53:18,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:53:18,462 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:53:18,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-16 19:53:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:53:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:19,052 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:53:19,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:53:19,189 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:53:19,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:53:19,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:19,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:19,414 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:53:19,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:53:19,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:19,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:19,505 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:19,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:19,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:21,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1018288979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:21,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416967741] [2022-11-16 19:53:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:21,212 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:21,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-16 19:53:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:53:21,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:21,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:53:21,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:53:21,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:21,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:21,690 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:53:21,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:53:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:21,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:21,752 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:21,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:21,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:22,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:53:22,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 172 [2022-11-16 19:53:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:32,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416967741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:32,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:53:32,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-16 19:53:32,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686109518] [2022-11-16 19:53:32,591 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:32,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 19:53:32,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:32,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 19:53:32,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=188, Unknown=2, NotChecked=0, Total=240 [2022-11-16 19:53:32,592 INFO L87 Difference]: Start difference. First operand 3350 states and 13337 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:34,310 INFO L93 Difference]: Finished difference Result 4551 states and 17361 transitions. [2022-11-16 19:53:34,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:53:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:53:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:34,323 INFO L225 Difference]: With dead ends: 4551 [2022-11-16 19:53:34,323 INFO L226 Difference]: Without dead ends: 4551 [2022-11-16 19:53:34,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=88, Invalid=330, Unknown=2, NotChecked=0, Total=420 [2022-11-16 19:53:34,324 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:34,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 271 Invalid, 0 Unknown, 393 Unchecked, 1.3s Time] [2022-11-16 19:53:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2022-11-16 19:53:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3351. [2022-11-16 19:53:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 3169 states have (on average 4.209845377090565) internal successors, (13341), 3350 states have internal predecessors, (13341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 13341 transitions. [2022-11-16 19:53:34,392 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 13341 transitions. Word has length 10 [2022-11-16 19:53:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:34,393 INFO L495 AbstractCegarLoop]: Abstraction has 3351 states and 13341 transitions. [2022-11-16 19:53:34,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 13341 transitions. [2022-11-16 19:53:34,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:53:34,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:34,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:34,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:34,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:34,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-16 19:53:34,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:53:34,995 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:34,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2523266, now seen corresponding path program 1 times [2022-11-16 19:53:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:34,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958471548] [2022-11-16 19:53:34,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:34,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:34,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:35,002 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 19:53:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:35,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:53:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:35,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:35,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:35,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:35,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:35,423 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:35,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:35,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:40,109 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958471548] [2022-11-16 19:53:40,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958471548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471234703] [2022-11-16 19:53:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:53:40,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:53:40,110 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:53:40,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-16 19:53:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:53:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:40,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:40,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:40,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:40,723 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:40,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:40,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:41,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1471234703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:41,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806298319] [2022-11-16 19:53:41,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:41,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:41,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:41,023 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:41,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-16 19:53:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:41,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:53:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:41,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:41,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:41,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:41,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:41,354 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:41,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:41,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:41,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806298319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:41,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:53:41,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 11 [2022-11-16 19:53:41,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234172503] [2022-11-16 19:53:41,653 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:41,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 19:53:41,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 19:53:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:53:41,654 INFO L87 Difference]: Start difference. First operand 3351 states and 13341 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:42,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:42,011 INFO L93 Difference]: Finished difference Result 3374 states and 13396 transitions. [2022-11-16 19:53:42,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:53:42,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:53:42,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:42,020 INFO L225 Difference]: With dead ends: 3374 [2022-11-16 19:53:42,021 INFO L226 Difference]: Without dead ends: 3374 [2022-11-16 19:53:42,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:53:42,021 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:42,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-11-16 19:53:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2022-11-16 19:53:42,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 3353. [2022-11-16 19:53:42,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3171 states have (on average 4.209397666351308) internal successors, (13348), 3352 states have internal predecessors, (13348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 13348 transitions. [2022-11-16 19:53:42,110 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 13348 transitions. Word has length 10 [2022-11-16 19:53:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:42,110 INFO L495 AbstractCegarLoop]: Abstraction has 3353 states and 13348 transitions. [2022-11-16 19:53:42,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 13348 transitions. [2022-11-16 19:53:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:53:42,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:42,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:42,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-11-16 19:53:42,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:42,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Ended with exit code 0 [2022-11-16 19:53:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:53:42,715 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2514878, now seen corresponding path program 1 times [2022-11-16 19:53:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:42,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200561810] [2022-11-16 19:53:42,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:42,717 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:42,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:42,720 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:42,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 19:53:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:42,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:53:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:53:42,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:42,991 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:42,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200561810] [2022-11-16 19:53:42,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200561810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:42,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:42,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:53:42,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056453189] [2022-11-16 19:53:42,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:42,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:53:42,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:53:42,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:42,992 INFO L87 Difference]: Start difference. First operand 3353 states and 13348 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:44,151 INFO L93 Difference]: Finished difference Result 6488 states and 25522 transitions. [2022-11-16 19:53:44,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:53:44,151 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 10 [2022-11-16 19:53:44,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:44,172 INFO L225 Difference]: With dead ends: 6488 [2022-11-16 19:53:44,172 INFO L226 Difference]: Without dead ends: 6488 [2022-11-16 19:53:44,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:53:44,173 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 192 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:44,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 0 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 19:53:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6488 states. [2022-11-16 19:53:44,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6488 to 3957. [2022-11-16 19:53:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3957 states, 3775 states have (on average 4.4797350993377485) internal successors, (16911), 3956 states have internal predecessors, (16911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3957 states to 3957 states and 16911 transitions. [2022-11-16 19:53:44,269 INFO L78 Accepts]: Start accepts. Automaton has 3957 states and 16911 transitions. Word has length 10 [2022-11-16 19:53:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:44,269 INFO L495 AbstractCegarLoop]: Abstraction has 3957 states and 16911 transitions. [2022-11-16 19:53:44,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3957 states and 16911 transitions. [2022-11-16 19:53:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:53:44,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:44,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:44,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-16 19:53:44,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:44,470 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:44,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2583503, now seen corresponding path program 2 times [2022-11-16 19:53:44,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:44,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635744095] [2022-11-16 19:53:44,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:53:44,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:44,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:44,472 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:44,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 19:53:44,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 19:53:44,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:53:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:53:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:44,835 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:53:44,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:53:44,976 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:53:44,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:53:45,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:45,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:45,100 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:53:45,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:53:45,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:45,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:45,163 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:45,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:53:45,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:45,251 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:45,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635744095] [2022-11-16 19:53:45,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635744095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:45,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:45,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:53:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166404821] [2022-11-16 19:53:45,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:45,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:53:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:53:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:53:45,253 INFO L87 Difference]: Start difference. First operand 3957 states and 16911 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:46,164 INFO L93 Difference]: Finished difference Result 5530 states and 22260 transitions. [2022-11-16 19:53:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:53:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 10 [2022-11-16 19:53:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:46,182 INFO L225 Difference]: With dead ends: 5530 [2022-11-16 19:53:46,182 INFO L226 Difference]: Without dead ends: 5530 [2022-11-16 19:53:46,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:53:46,183 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:46,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:53:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5530 states. [2022-11-16 19:53:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5530 to 3749. [2022-11-16 19:53:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3567 states have (on average 4.392486683487524) internal successors, (15668), 3748 states have internal predecessors, (15668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 15668 transitions. [2022-11-16 19:53:46,267 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 15668 transitions. Word has length 10 [2022-11-16 19:53:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:46,267 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 15668 transitions. [2022-11-16 19:53:46,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 15668 transitions. [2022-11-16 19:53:46,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:53:46,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:46,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:46,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-16 19:53:46,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:46,469 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:46,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2583716, now seen corresponding path program 2 times [2022-11-16 19:53:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:46,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387634731] [2022-11-16 19:53:46,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:53:46,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:46,470 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:46,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 19:53:46,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 19:53:46,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:53:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:53:46,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:46,702 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:46,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:46,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:46,792 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:46,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:53:46,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:46,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387634731] [2022-11-16 19:53:46,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387634731] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:46,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:46,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:53:46,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611687902] [2022-11-16 19:53:46,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:46,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:53:46,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:46,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:53:46,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:53:46,884 INFO L87 Difference]: Start difference. First operand 3749 states and 15668 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:47,797 INFO L93 Difference]: Finished difference Result 5093 states and 20356 transitions. [2022-11-16 19:53:47,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:53:47,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 10 [2022-11-16 19:53:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:47,814 INFO L225 Difference]: With dead ends: 5093 [2022-11-16 19:53:47,814 INFO L226 Difference]: Without dead ends: 5093 [2022-11-16 19:53:47,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:53:47,814 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:47,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:53:47,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5093 states. [2022-11-16 19:53:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5093 to 3732. [2022-11-16 19:53:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3732 states, 3550 states have (on average 4.338591549295774) internal successors, (15402), 3731 states have internal predecessors, (15402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3732 states to 3732 states and 15402 transitions. [2022-11-16 19:53:47,890 INFO L78 Accepts]: Start accepts. Automaton has 3732 states and 15402 transitions. Word has length 10 [2022-11-16 19:53:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:47,891 INFO L495 AbstractCegarLoop]: Abstraction has 3732 states and 15402 transitions. [2022-11-16 19:53:47,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:47,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3732 states and 15402 transitions. [2022-11-16 19:53:47,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:53:47,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:47,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:47,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 19:53:48,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:48,092 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:48,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:48,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1109186986, now seen corresponding path program 1 times [2022-11-16 19:53:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:48,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313977624] [2022-11-16 19:53:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:48,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:48,094 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:48,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 19:53:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:48,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:53:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:48,458 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:53:48,458 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 33 treesize of output 44 [2022-11-16 19:53:48,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:48,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:53:48,580 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:53:48,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:53:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:53:48,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:48,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:48,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313977624] [2022-11-16 19:53:48,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313977624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:48,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:48,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:53:48,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386736706] [2022-11-16 19:53:48,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:48,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:53:48,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:53:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:53:48,666 INFO L87 Difference]: Start difference. First operand 3732 states and 15402 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:49,093 INFO L93 Difference]: Finished difference Result 3738 states and 15412 transitions. [2022-11-16 19:53:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:53:49,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:53:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:49,106 INFO L225 Difference]: With dead ends: 3738 [2022-11-16 19:53:49,106 INFO L226 Difference]: Without dead ends: 3738 [2022-11-16 19:53:49,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:53:49,107 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:49,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:53:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2022-11-16 19:53:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3735. [2022-11-16 19:53:49,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3735 states, 3553 states have (on average 4.336335491134252) internal successors, (15407), 3734 states have internal predecessors, (15407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3735 states to 3735 states and 15407 transitions. [2022-11-16 19:53:49,181 INFO L78 Accepts]: Start accepts. Automaton has 3735 states and 15407 transitions. Word has length 11 [2022-11-16 19:53:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:49,181 INFO L495 AbstractCegarLoop]: Abstraction has 3735 states and 15407 transitions. [2022-11-16 19:53:49,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3735 states and 15407 transitions. [2022-11-16 19:53:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:53:49,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:49,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:49,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 19:53:49,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:49,387 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:49,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1108323047, now seen corresponding path program 1 times [2022-11-16 19:53:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:49,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170854282] [2022-11-16 19:53:49,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:49,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:49,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:49,388 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:49,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 19:53:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:49,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:53:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:49,740 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:53:49,740 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 33 treesize of output 44 [2022-11-16 19:53:49,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:49,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:53:49,872 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:53:49,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:53:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:53:49,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:53:49,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:49,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170854282] [2022-11-16 19:53:49,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170854282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:53:49,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:53:49,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:53:49,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532344352] [2022-11-16 19:53:49,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:53:49,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:53:49,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:49,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:53:49,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:53:49,952 INFO L87 Difference]: Start difference. First operand 3735 states and 15407 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:53:50,349 INFO L93 Difference]: Finished difference Result 3733 states and 15398 transitions. [2022-11-16 19:53:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:53:50,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:53:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:53:50,360 INFO L225 Difference]: With dead ends: 3733 [2022-11-16 19:53:50,360 INFO L226 Difference]: Without dead ends: 3733 [2022-11-16 19:53:50,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:53:50,361 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:53:50,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 56 Unchecked, 0.4s Time] [2022-11-16 19:53:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-11-16 19:53:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3733. [2022-11-16 19:53:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3551 states have (on average 4.336243311743171) internal successors, (15398), 3732 states have internal predecessors, (15398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 15398 transitions. [2022-11-16 19:53:50,429 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 15398 transitions. Word has length 11 [2022-11-16 19:53:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:53:50,429 INFO L495 AbstractCegarLoop]: Abstraction has 3733 states and 15398 transitions. [2022-11-16 19:53:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:53:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 15398 transitions. [2022-11-16 19:53:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:53:50,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:53:50,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:53:50,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-16 19:53:50,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:50,630 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:53:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:53:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1109970438, now seen corresponding path program 1 times [2022-11-16 19:53:50,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:53:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057039274] [2022-11-16 19:53:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:50,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:53:50,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:53:50,633 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:53:50,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 19:53:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:53:50,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:50,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:50,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:51,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:51,051 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:51,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:51,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:53,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:53:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057039274] [2022-11-16 19:53:53,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057039274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:53,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400220127] [2022-11-16 19:53:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:53,745 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:53:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:53:53,747 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:53:53,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-16 19:53:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:54,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:53:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:54,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:53:54,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:54,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:53:54,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:53:54,376 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:53:54,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:53:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:54,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:53:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400220127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695642856] [2022-11-16 19:53:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:53:54,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:53:54,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:53:54,717 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:53:54,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-16 19:53:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:53:54,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:53:54,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:53:54,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:53:55,146 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:53:55,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:53:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:53:55,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:53:58,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:53:58,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695642856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:53:58,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:53:58,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-16 19:53:58,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964515061] [2022-11-16 19:53:58,596 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:53:58,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:53:58,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:53:58,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:53:58,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2022-11-16 19:53:58,597 INFO L87 Difference]: Start difference. First operand 3733 states and 15398 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:04,140 INFO L93 Difference]: Finished difference Result 6827 states and 26534 transitions. [2022-11-16 19:54:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:54:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:04,163 INFO L225 Difference]: With dead ends: 6827 [2022-11-16 19:54:04,163 INFO L226 Difference]: Without dead ends: 6827 [2022-11-16 19:54:04,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=126, Invalid=473, Unknown=1, NotChecked=0, Total=600 [2022-11-16 19:54:04,164 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 542 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:04,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 624 Invalid, 0 Unknown, 542 Unchecked, 2.2s Time] [2022-11-16 19:54:04,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2022-11-16 19:54:04,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 3763. [2022-11-16 19:54:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3581 states have (on average 4.32225635297403) internal successors, (15478), 3762 states have internal predecessors, (15478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:04,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 15478 transitions. [2022-11-16 19:54:04,289 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 15478 transitions. Word has length 11 [2022-11-16 19:54:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:04,289 INFO L495 AbstractCegarLoop]: Abstraction has 3763 states and 15478 transitions. [2022-11-16 19:54:04,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 15478 transitions. [2022-11-16 19:54:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:04,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:04,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:04,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:04,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-16 19:54:04,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:04,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:54:04,895 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:04,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1109970492, now seen corresponding path program 1 times [2022-11-16 19:54:04,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:04,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784732890] [2022-11-16 19:54:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:04,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:04,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:04,897 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:04,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 19:54:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:05,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:54:05,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:05,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:54:05,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:05,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:05,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784732890] [2022-11-16 19:54:05,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784732890] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:05,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:05,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:54:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431033964] [2022-11-16 19:54:05,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:05,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:05,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:05,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:05,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:05,149 INFO L87 Difference]: Start difference. First operand 3763 states and 15478 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:05,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:05,535 INFO L93 Difference]: Finished difference Result 2870 states and 11684 transitions. [2022-11-16 19:54:05,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:54:05,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:05,543 INFO L225 Difference]: With dead ends: 2870 [2022-11-16 19:54:05,543 INFO L226 Difference]: Without dead ends: 2870 [2022-11-16 19:54:05,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:05,544 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:05,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 19:54:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2022-11-16 19:54:05,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2870. [2022-11-16 19:54:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2764 states have (on average 4.227206946454414) internal successors, (11684), 2869 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 11684 transitions. [2022-11-16 19:54:05,591 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 11684 transitions. Word has length 11 [2022-11-16 19:54:05,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:05,591 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 11684 transitions. [2022-11-16 19:54:05,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 11684 transitions. [2022-11-16 19:54:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:05,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:05,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:05,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-16 19:54:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:05,792 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:05,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1109970604, now seen corresponding path program 1 times [2022-11-16 19:54:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:05,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315603032] [2022-11-16 19:54:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:05,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:05,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:05,794 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:05,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 19:54:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:06,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:06,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:06,187 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:06,188 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 33 treesize of output 44 [2022-11-16 19:54:06,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:06,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:06,285 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:06,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:06,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:06,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:06,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315603032] [2022-11-16 19:54:06,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315603032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:06,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:06,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:06,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352668912] [2022-11-16 19:54:06,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:06,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:06,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:06,374 INFO L87 Difference]: Start difference. First operand 2870 states and 11684 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:06,768 INFO L93 Difference]: Finished difference Result 2868 states and 11670 transitions. [2022-11-16 19:54:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:06,777 INFO L225 Difference]: With dead ends: 2868 [2022-11-16 19:54:06,777 INFO L226 Difference]: Without dead ends: 2868 [2022-11-16 19:54:06,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:06,777 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:06,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-16 19:54:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2022-11-16 19:54:06,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 2868. [2022-11-16 19:54:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2762 states have (on average 4.225199131064446) internal successors, (11670), 2867 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:06,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11670 transitions. [2022-11-16 19:54:06,826 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11670 transitions. Word has length 11 [2022-11-16 19:54:06,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:06,826 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11670 transitions. [2022-11-16 19:54:06,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11670 transitions. [2022-11-16 19:54:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:06,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:06,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:06,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 19:54:07,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:07,030 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:07,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1109971751, now seen corresponding path program 1 times [2022-11-16 19:54:07,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:07,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230599216] [2022-11-16 19:54:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:07,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:07,032 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:07,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 19:54:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:07,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:54:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:07,408 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:07,408 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 33 treesize of output 44 [2022-11-16 19:54:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:07,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:07,501 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:07,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:07,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:07,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230599216] [2022-11-16 19:54:07,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230599216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:07,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:07,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:07,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458899303] [2022-11-16 19:54:07,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:07,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:07,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:07,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:07,579 INFO L87 Difference]: Start difference. First operand 2868 states and 11670 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:07,951 INFO L93 Difference]: Finished difference Result 2871 states and 11679 transitions. [2022-11-16 19:54:07,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:07,951 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:07,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:07,959 INFO L225 Difference]: With dead ends: 2871 [2022-11-16 19:54:07,959 INFO L226 Difference]: Without dead ends: 2871 [2022-11-16 19:54:07,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:07,959 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:07,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2022-11-16 19:54:07,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2868. [2022-11-16 19:54:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2762 states have (on average 4.225199131064446) internal successors, (11670), 2867 states have internal predecessors, (11670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11670 transitions. [2022-11-16 19:54:08,008 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11670 transitions. Word has length 11 [2022-11-16 19:54:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:08,008 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11670 transitions. [2022-11-16 19:54:08,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11670 transitions. [2022-11-16 19:54:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:08,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:08,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:08,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 19:54:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:08,215 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash -593407454, now seen corresponding path program 1 times [2022-11-16 19:54:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:08,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776691191] [2022-11-16 19:54:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:08,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:08,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:08,216 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:08,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 19:54:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:08,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:08,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:08,554 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:08,555 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 33 treesize of output 44 [2022-11-16 19:54:08,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:08,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:08,686 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:08,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:08,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:08,768 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:08,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776691191] [2022-11-16 19:54:08,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776691191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:08,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:08,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967039801] [2022-11-16 19:54:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:08,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:08,769 INFO L87 Difference]: Start difference. First operand 2868 states and 11670 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:09,128 INFO L93 Difference]: Finished difference Result 2877 states and 11693 transitions. [2022-11-16 19:54:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:09,137 INFO L225 Difference]: With dead ends: 2877 [2022-11-16 19:54:09,137 INFO L226 Difference]: Without dead ends: 2877 [2022-11-16 19:54:09,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:09,138 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:09,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2022-11-16 19:54:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2876. [2022-11-16 19:54:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2770 states have (on average 4.220577617328519) internal successors, (11691), 2875 states have internal predecessors, (11691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 11691 transitions. [2022-11-16 19:54:09,190 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 11691 transitions. Word has length 11 [2022-11-16 19:54:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:09,190 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 11691 transitions. [2022-11-16 19:54:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 11691 transitions. [2022-11-16 19:54:09,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:09,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:09,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:09,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:09,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:09,408 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:09,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:09,408 INFO L85 PathProgramCache]: Analyzing trace with hash -593406307, now seen corresponding path program 1 times [2022-11-16 19:54:09,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:09,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574314877] [2022-11-16 19:54:09,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:09,409 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:09,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 19:54:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:09,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:09,735 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:09,735 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 33 treesize of output 44 [2022-11-16 19:54:09,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:09,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:09,828 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:09,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:09,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:09,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:09,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:09,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574314877] [2022-11-16 19:54:09,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574314877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:09,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:09,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:09,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662827831] [2022-11-16 19:54:09,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:09,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:09,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:09,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:09,907 INFO L87 Difference]: Start difference. First operand 2876 states and 11691 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:10,296 INFO L93 Difference]: Finished difference Result 2879 states and 11698 transitions. [2022-11-16 19:54:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:10,306 INFO L225 Difference]: With dead ends: 2879 [2022-11-16 19:54:10,306 INFO L226 Difference]: Without dead ends: 2879 [2022-11-16 19:54:10,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:10,306 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:10,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-16 19:54:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-11-16 19:54:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2875. [2022-11-16 19:54:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2769 states have (on average 4.222462983026364) internal successors, (11692), 2874 states have internal predecessors, (11692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 11692 transitions. [2022-11-16 19:54:10,378 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 11692 transitions. Word has length 11 [2022-11-16 19:54:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:10,378 INFO L495 AbstractCegarLoop]: Abstraction has 2875 states and 11692 transitions. [2022-11-16 19:54:10,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 11692 transitions. [2022-11-16 19:54:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:10,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:10,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:10,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:10,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:10,592 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:10,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:10,592 INFO L85 PathProgramCache]: Analyzing trace with hash -618798438, now seen corresponding path program 1 times [2022-11-16 19:54:10,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:10,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79639845] [2022-11-16 19:54:10,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:10,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:10,594 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:10,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 19:54:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:10,933 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:10,934 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 33 treesize of output 44 [2022-11-16 19:54:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:10,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:11,032 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:11,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:11,125 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:11,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:11,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79639845] [2022-11-16 19:54:11,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79639845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:11,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:11,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:11,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882219938] [2022-11-16 19:54:11,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:11,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:11,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:11,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:11,127 INFO L87 Difference]: Start difference. First operand 2875 states and 11692 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:11,496 INFO L93 Difference]: Finished difference Result 2884 states and 11710 transitions. [2022-11-16 19:54:11,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:11,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:11,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:11,505 INFO L225 Difference]: With dead ends: 2884 [2022-11-16 19:54:11,505 INFO L226 Difference]: Without dead ends: 2884 [2022-11-16 19:54:11,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:11,505 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:11,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2884 states. [2022-11-16 19:54:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2884 to 2878. [2022-11-16 19:54:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2772 states have (on average 4.220779220779221) internal successors, (11700), 2877 states have internal predecessors, (11700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 11700 transitions. [2022-11-16 19:54:11,557 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 11700 transitions. Word has length 11 [2022-11-16 19:54:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:11,557 INFO L495 AbstractCegarLoop]: Abstraction has 2878 states and 11700 transitions. [2022-11-16 19:54:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 11700 transitions. [2022-11-16 19:54:11,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:11,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:11,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:11,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-16 19:54:11,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:11,759 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash -620189563, now seen corresponding path program 1 times [2022-11-16 19:54:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:11,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403308636] [2022-11-16 19:54:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:11,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:11,760 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-16 19:54:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:12,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:12,100 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:12,100 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 33 treesize of output 44 [2022-11-16 19:54:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:12,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:12,205 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:12,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:12,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:12,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:12,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403308636] [2022-11-16 19:54:12,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403308636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:12,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:12,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799007381] [2022-11-16 19:54:12,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:12,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:12,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:12,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:12,286 INFO L87 Difference]: Start difference. First operand 2878 states and 11700 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:12,644 INFO L93 Difference]: Finished difference Result 2878 states and 11699 transitions. [2022-11-16 19:54:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:12,654 INFO L225 Difference]: With dead ends: 2878 [2022-11-16 19:54:12,654 INFO L226 Difference]: Without dead ends: 2878 [2022-11-16 19:54:12,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:12,655 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:12,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:12,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2022-11-16 19:54:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2877. [2022-11-16 19:54:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2877 states, 2771 states have (on average 4.220858895705521) internal successors, (11696), 2876 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:12,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2877 states to 2877 states and 11696 transitions. [2022-11-16 19:54:12,709 INFO L78 Accepts]: Start accepts. Automaton has 2877 states and 11696 transitions. Word has length 11 [2022-11-16 19:54:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:12,709 INFO L495 AbstractCegarLoop]: Abstraction has 2877 states and 11696 transitions. [2022-11-16 19:54:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2877 states and 11696 transitions. [2022-11-16 19:54:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:12,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:12,710 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:12,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-16 19:54:12,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:12,911 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash -620188416, now seen corresponding path program 1 times [2022-11-16 19:54:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:12,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636918148] [2022-11-16 19:54:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:12,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:12,912 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:12,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 19:54:13,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:13,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:54:13,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:13,265 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:13,265 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 33 treesize of output 44 [2022-11-16 19:54:13,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:13,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:13,363 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:13,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:13,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:13,435 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:13,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636918148] [2022-11-16 19:54:13,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636918148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:13,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:13,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:13,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444718547] [2022-11-16 19:54:13,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:13,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:13,436 INFO L87 Difference]: Start difference. First operand 2877 states and 11696 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:13,808 INFO L93 Difference]: Finished difference Result 2879 states and 11701 transitions. [2022-11-16 19:54:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:13,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:13,816 INFO L225 Difference]: With dead ends: 2879 [2022-11-16 19:54:13,817 INFO L226 Difference]: Without dead ends: 2879 [2022-11-16 19:54:13,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:13,817 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:13,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-11-16 19:54:13,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2874. [2022-11-16 19:54:13,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2768 states have (on average 4.222543352601156) internal successors, (11688), 2873 states have internal predecessors, (11688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 11688 transitions. [2022-11-16 19:54:13,872 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 11688 transitions. Word has length 11 [2022-11-16 19:54:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:13,872 INFO L495 AbstractCegarLoop]: Abstraction has 2874 states and 11688 transitions. [2022-11-16 19:54:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 11688 transitions. [2022-11-16 19:54:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:13,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:13,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:13,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 19:54:14,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:14,074 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash -569111576, now seen corresponding path program 1 times [2022-11-16 19:54:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:14,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414157736] [2022-11-16 19:54:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:14,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:14,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:14,075 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:14,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 19:54:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:14,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:54:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:14,433 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:14,433 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 33 treesize of output 44 [2022-11-16 19:54:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:14,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:14,545 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:14,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:14,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:14,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:14,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414157736] [2022-11-16 19:54:14,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414157736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:14,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:14,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492868868] [2022-11-16 19:54:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:14,631 INFO L87 Difference]: Start difference. First operand 2874 states and 11688 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:14,992 INFO L93 Difference]: Finished difference Result 2877 states and 11697 transitions. [2022-11-16 19:54:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:15,000 INFO L225 Difference]: With dead ends: 2877 [2022-11-16 19:54:15,001 INFO L226 Difference]: Without dead ends: 2877 [2022-11-16 19:54:15,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:15,001 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:15,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:15,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2022-11-16 19:54:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2869. [2022-11-16 19:54:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2763 states have (on average 4.224393774882374) internal successors, (11672), 2868 states have internal predecessors, (11672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:15,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 11672 transitions. [2022-11-16 19:54:15,051 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 11672 transitions. Word has length 11 [2022-11-16 19:54:15,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 2869 states and 11672 transitions. [2022-11-16 19:54:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 11672 transitions. [2022-11-16 19:54:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:15,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:15,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:15,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:15,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:15,264 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:15,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:15,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1981961180, now seen corresponding path program 1 times [2022-11-16 19:54:15,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:15,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [84214250] [2022-11-16 19:54:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:15,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:15,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:15,265 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:15,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-16 19:54:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:15,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:54:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:15,611 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:15,611 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 33 treesize of output 44 [2022-11-16 19:54:15,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:15,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:15,699 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:15,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:15,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:15,779 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:15,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [84214250] [2022-11-16 19:54:15,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [84214250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:15,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:15,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233298412] [2022-11-16 19:54:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:15,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:15,780 INFO L87 Difference]: Start difference. First operand 2869 states and 11672 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:16,125 INFO L93 Difference]: Finished difference Result 2882 states and 11702 transitions. [2022-11-16 19:54:16,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:16,133 INFO L225 Difference]: With dead ends: 2882 [2022-11-16 19:54:16,134 INFO L226 Difference]: Without dead ends: 2882 [2022-11-16 19:54:16,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:16,134 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:16,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2882 states. [2022-11-16 19:54:16,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2882 to 2872. [2022-11-16 19:54:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2766 states have (on average 4.221619667389732) internal successors, (11677), 2871 states have internal predecessors, (11677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:16,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 11677 transitions. [2022-11-16 19:54:16,205 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 11677 transitions. Word has length 11 [2022-11-16 19:54:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:16,206 INFO L495 AbstractCegarLoop]: Abstraction has 2872 states and 11677 transitions. [2022-11-16 19:54:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 11677 transitions. [2022-11-16 19:54:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:16,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:16,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:16,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:16,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:16,419 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:16,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:16,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1981960033, now seen corresponding path program 1 times [2022-11-16 19:54:16,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:16,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5547137] [2022-11-16 19:54:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:16,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:16,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:16,421 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:16,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 19:54:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:16,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:16,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:16,777 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:16,777 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 33 treesize of output 44 [2022-11-16 19:54:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:16,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:16,868 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:16,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:16,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:16,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5547137] [2022-11-16 19:54:16,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5547137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:16,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:16,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530932166] [2022-11-16 19:54:16,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:16,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:16,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:16,960 INFO L87 Difference]: Start difference. First operand 2872 states and 11677 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:17,355 INFO L93 Difference]: Finished difference Result 2883 states and 11702 transitions. [2022-11-16 19:54:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:17,363 INFO L225 Difference]: With dead ends: 2883 [2022-11-16 19:54:17,363 INFO L226 Difference]: Without dead ends: 2883 [2022-11-16 19:54:17,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:17,364 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:17,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-16 19:54:17,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-16 19:54:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2870. [2022-11-16 19:54:17,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2764 states have (on average 4.223950795947902) internal successors, (11675), 2869 states have internal predecessors, (11675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 11675 transitions. [2022-11-16 19:54:17,411 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 11675 transitions. Word has length 11 [2022-11-16 19:54:17,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:17,411 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 11675 transitions. [2022-11-16 19:54:17,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 11675 transitions. [2022-11-16 19:54:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:17,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:17,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:17,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-16 19:54:17,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:17,613 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2007352164, now seen corresponding path program 1 times [2022-11-16 19:54:17,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:17,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129184146] [2022-11-16 19:54:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:17,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:17,614 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:17,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-16 19:54:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:17,980 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:17,980 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 33 treesize of output 44 [2022-11-16 19:54:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:18,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:18,081 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:18,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:18,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:18,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:18,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129184146] [2022-11-16 19:54:18,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129184146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:18,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:18,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:18,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795335812] [2022-11-16 19:54:18,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:18,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:18,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:18,188 INFO L87 Difference]: Start difference. First operand 2870 states and 11675 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:18,573 INFO L93 Difference]: Finished difference Result 2883 states and 11705 transitions. [2022-11-16 19:54:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:18,582 INFO L225 Difference]: With dead ends: 2883 [2022-11-16 19:54:18,582 INFO L226 Difference]: Without dead ends: 2883 [2022-11-16 19:54:18,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:18,582 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:18,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:18,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-11-16 19:54:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2870. [2022-11-16 19:54:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2764 states have (on average 4.223950795947902) internal successors, (11675), 2869 states have internal predecessors, (11675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 11675 transitions. [2022-11-16 19:54:18,633 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 11675 transitions. Word has length 11 [2022-11-16 19:54:18,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:18,634 INFO L495 AbstractCegarLoop]: Abstraction has 2870 states and 11675 transitions. [2022-11-16 19:54:18,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 11675 transitions. [2022-11-16 19:54:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:18,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:18,635 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:18,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-16 19:54:18,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:18,835 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash -2008743289, now seen corresponding path program 1 times [2022-11-16 19:54:18,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:18,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936133970] [2022-11-16 19:54:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:18,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:18,837 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:18,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 19:54:19,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:19,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:19,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:19,183 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:19,183 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 33 treesize of output 44 [2022-11-16 19:54:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:19,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:19,275 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:19,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:19,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:19,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:19,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:19,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936133970] [2022-11-16 19:54:19,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936133970] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:19,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:19,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530882739] [2022-11-16 19:54:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:19,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:19,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:19,373 INFO L87 Difference]: Start difference. First operand 2870 states and 11675 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:19,740 INFO L93 Difference]: Finished difference Result 2878 states and 11699 transitions. [2022-11-16 19:54:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:19,749 INFO L225 Difference]: With dead ends: 2878 [2022-11-16 19:54:19,750 INFO L226 Difference]: Without dead ends: 2878 [2022-11-16 19:54:19,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:19,750 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:19,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2022-11-16 19:54:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2868. [2022-11-16 19:54:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2868 states, 2762 states have (on average 4.224837074583635) internal successors, (11669), 2867 states have internal predecessors, (11669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2868 states to 2868 states and 11669 transitions. [2022-11-16 19:54:19,804 INFO L78 Accepts]: Start accepts. Automaton has 2868 states and 11669 transitions. Word has length 11 [2022-11-16 19:54:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:19,805 INFO L495 AbstractCegarLoop]: Abstraction has 2868 states and 11669 transitions. [2022-11-16 19:54:19,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2868 states and 11669 transitions. [2022-11-16 19:54:19,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:19,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:19,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:19,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-16 19:54:20,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:20,006 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2008742142, now seen corresponding path program 1 times [2022-11-16 19:54:20,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:20,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759360982] [2022-11-16 19:54:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:20,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:20,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:20,007 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:20,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 19:54:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:20,396 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:20,396 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 33 treesize of output 44 [2022-11-16 19:54:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:20,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:20,484 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:20,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:20,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:20,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:20,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759360982] [2022-11-16 19:54:20,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759360982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:20,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:20,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:20,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615767380] [2022-11-16 19:54:20,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:20,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:20,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:20,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:20,602 INFO L87 Difference]: Start difference. First operand 2868 states and 11669 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:20,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:20,980 INFO L93 Difference]: Finished difference Result 2878 states and 11696 transitions. [2022-11-16 19:54:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:20,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:20,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:20,988 INFO L225 Difference]: With dead ends: 2878 [2022-11-16 19:54:20,989 INFO L226 Difference]: Without dead ends: 2878 [2022-11-16 19:54:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:20,989 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:20,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:20,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2878 states. [2022-11-16 19:54:21,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2878 to 2864. [2022-11-16 19:54:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2864 states, 2758 states have (on average 4.226976069615664) internal successors, (11658), 2863 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 11658 transitions. [2022-11-16 19:54:21,035 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 11658 transitions. Word has length 11 [2022-11-16 19:54:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:21,036 INFO L495 AbstractCegarLoop]: Abstraction has 2864 states and 11658 transitions. [2022-11-16 19:54:21,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 11658 transitions. [2022-11-16 19:54:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:21,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:21,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:21,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-16 19:54:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:21,237 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1957665302, now seen corresponding path program 1 times [2022-11-16 19:54:21,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:21,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003314002] [2022-11-16 19:54:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:21,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:21,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:21,238 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:21,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 19:54:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:21,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:21,611 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:21,611 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 33 treesize of output 44 [2022-11-16 19:54:21,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:21,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:21,704 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:21,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:21,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:21,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:21,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003314002] [2022-11-16 19:54:21,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003314002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:21,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:21,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:21,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626712733] [2022-11-16 19:54:21,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:21,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:21,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:21,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:21,799 INFO L87 Difference]: Start difference. First operand 2864 states and 11658 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:22,197 INFO L93 Difference]: Finished difference Result 2871 states and 11680 transitions. [2022-11-16 19:54:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:22,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:22,206 INFO L225 Difference]: With dead ends: 2871 [2022-11-16 19:54:22,206 INFO L226 Difference]: Without dead ends: 2871 [2022-11-16 19:54:22,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:22,207 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:22,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-16 19:54:22,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2022-11-16 19:54:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2859. [2022-11-16 19:54:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2753 states have (on average 4.228841264075554) internal successors, (11642), 2858 states have internal predecessors, (11642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 11642 transitions. [2022-11-16 19:54:22,258 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 11642 transitions. Word has length 11 [2022-11-16 19:54:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:22,258 INFO L495 AbstractCegarLoop]: Abstraction has 2859 states and 11642 transitions. [2022-11-16 19:54:22,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 11642 transitions. [2022-11-16 19:54:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:22,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:22,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:22,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:22,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:22,473 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1072189748, now seen corresponding path program 1 times [2022-11-16 19:54:22,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:22,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312110270] [2022-11-16 19:54:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:22,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:22,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:22,475 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:22,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-16 19:54:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:22,813 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:22,814 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 33 treesize of output 44 [2022-11-16 19:54:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:22,897 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:22,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:22,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:22,983 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:22,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312110270] [2022-11-16 19:54:22,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312110270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:22,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:22,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:22,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107748031] [2022-11-16 19:54:22,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:22,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:22,984 INFO L87 Difference]: Start difference. First operand 2859 states and 11642 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:23,356 INFO L93 Difference]: Finished difference Result 2870 states and 11669 transitions. [2022-11-16 19:54:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:23,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:23,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:23,365 INFO L225 Difference]: With dead ends: 2870 [2022-11-16 19:54:23,365 INFO L226 Difference]: Without dead ends: 2870 [2022-11-16 19:54:23,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:23,366 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:23,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2022-11-16 19:54:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2869. [2022-11-16 19:54:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2763 states have (on average 4.22294607310894) internal successors, (11668), 2868 states have internal predecessors, (11668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:23,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 11668 transitions. [2022-11-16 19:54:23,412 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 11668 transitions. Word has length 11 [2022-11-16 19:54:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:23,413 INFO L495 AbstractCegarLoop]: Abstraction has 2869 states and 11668 transitions. [2022-11-16 19:54:23,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 11668 transitions. [2022-11-16 19:54:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:23,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:23,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:23,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:23,614 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash 285065524, now seen corresponding path program 1 times [2022-11-16 19:54:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874355412] [2022-11-16 19:54:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:23,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:23,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:23,616 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:23,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 19:54:23,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:23,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:23,951 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:23,952 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 33 treesize of output 44 [2022-11-16 19:54:23,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:23,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:24,034 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:24,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:24,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:24,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:24,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874355412] [2022-11-16 19:54:24,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874355412] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:24,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:24,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010506715] [2022-11-16 19:54:24,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:24,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:24,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:24,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:24,111 INFO L87 Difference]: Start difference. First operand 2869 states and 11668 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:24,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:24,491 INFO L93 Difference]: Finished difference Result 2877 states and 11686 transitions. [2022-11-16 19:54:24,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:24,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:24,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:24,500 INFO L225 Difference]: With dead ends: 2877 [2022-11-16 19:54:24,500 INFO L226 Difference]: Without dead ends: 2877 [2022-11-16 19:54:24,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:24,501 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:24,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2022-11-16 19:54:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2876. [2022-11-16 19:54:24,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2770 states have (on average 4.218050541516246) internal successors, (11684), 2875 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:24,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 11684 transitions. [2022-11-16 19:54:24,572 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 11684 transitions. Word has length 11 [2022-11-16 19:54:24,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:24,572 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 11684 transitions. [2022-11-16 19:54:24,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:24,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 11684 transitions. [2022-11-16 19:54:24,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:24,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:24,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:24,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-16 19:54:24,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:24,773 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:24,774 INFO L85 PathProgramCache]: Analyzing trace with hash 285066671, now seen corresponding path program 1 times [2022-11-16 19:54:24,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:24,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461277363] [2022-11-16 19:54:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:24,774 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:24,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:24,775 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:24,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-16 19:54:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:54:25,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:25,098 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:25,098 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 33 treesize of output 44 [2022-11-16 19:54:25,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:25,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:25,181 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:25,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:25,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:25,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:25,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461277363] [2022-11-16 19:54:25,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461277363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:25,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:25,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:25,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217145667] [2022-11-16 19:54:25,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:25,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:25,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:25,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:25,268 INFO L87 Difference]: Start difference. First operand 2876 states and 11684 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:25,636 INFO L93 Difference]: Finished difference Result 2879 states and 11690 transitions. [2022-11-16 19:54:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:25,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:25,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:25,644 INFO L225 Difference]: With dead ends: 2879 [2022-11-16 19:54:25,644 INFO L226 Difference]: Without dead ends: 2879 [2022-11-16 19:54:25,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:25,645 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:25,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2022-11-16 19:54:25,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2875. [2022-11-16 19:54:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2769 states have (on average 4.21957385337667) internal successors, (11684), 2874 states have internal predecessors, (11684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 11684 transitions. [2022-11-16 19:54:25,698 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 11684 transitions. Word has length 11 [2022-11-16 19:54:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:25,698 INFO L495 AbstractCegarLoop]: Abstraction has 2875 states and 11684 transitions. [2022-11-16 19:54:25,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 11684 transitions. [2022-11-16 19:54:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:25,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:25,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:25,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:25,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:25,899 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash 241944369, now seen corresponding path program 1 times [2022-11-16 19:54:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:25,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1491625775] [2022-11-16 19:54:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:25,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:25,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:25,901 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:25,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 19:54:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:54:26,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:26,225 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:26,225 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 33 treesize of output 44 [2022-11-16 19:54:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:26,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:26,311 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:26,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:26,398 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:26,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1491625775] [2022-11-16 19:54:26,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1491625775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:26,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:26,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:26,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231687948] [2022-11-16 19:54:26,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:26,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:26,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:26,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:26,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:26,399 INFO L87 Difference]: Start difference. First operand 2875 states and 11684 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:26,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:26,754 INFO L93 Difference]: Finished difference Result 2876 states and 11686 transitions. [2022-11-16 19:54:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:26,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:26,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:26,763 INFO L225 Difference]: With dead ends: 2876 [2022-11-16 19:54:26,763 INFO L226 Difference]: Without dead ends: 2876 [2022-11-16 19:54:26,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:26,764 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:26,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-11-16 19:54:26,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2874. [2022-11-16 19:54:26,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2874 states, 2768 states have (on average 4.220014450867052) internal successors, (11681), 2873 states have internal predecessors, (11681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2874 states to 2874 states and 11681 transitions. [2022-11-16 19:54:26,811 INFO L78 Accepts]: Start accepts. Automaton has 2874 states and 11681 transitions. Word has length 11 [2022-11-16 19:54:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:26,811 INFO L495 AbstractCegarLoop]: Abstraction has 2874 states and 11681 transitions. [2022-11-16 19:54:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2874 states and 11681 transitions. [2022-11-16 19:54:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:26,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:26,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:26,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Ended with exit code 0 [2022-11-16 19:54:27,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:27,012 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:27,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1827259284, now seen corresponding path program 1 times [2022-11-16 19:54:27,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:27,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120190482] [2022-11-16 19:54:27,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:27,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:27,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:27,014 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:27,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 19:54:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:27,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:27,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:27,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:54:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:27,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:27,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:27,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120190482] [2022-11-16 19:54:27,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120190482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:27,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:27,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:54:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463428048] [2022-11-16 19:54:27,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:27,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:54:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:54:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:27,399 INFO L87 Difference]: Start difference. First operand 2874 states and 11681 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:28,226 INFO L93 Difference]: Finished difference Result 4133 states and 16900 transitions. [2022-11-16 19:54:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:28,237 INFO L225 Difference]: With dead ends: 4133 [2022-11-16 19:54:28,237 INFO L226 Difference]: Without dead ends: 4133 [2022-11-16 19:54:28,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:54:28,238 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:28,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:54:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2022-11-16 19:54:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3293. [2022-11-16 19:54:28,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3293 states, 3187 states have (on average 4.473799811735174) internal successors, (14258), 3292 states have internal predecessors, (14258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3293 states to 3293 states and 14258 transitions. [2022-11-16 19:54:28,314 INFO L78 Accepts]: Start accepts. Automaton has 3293 states and 14258 transitions. Word has length 11 [2022-11-16 19:54:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:28,314 INFO L495 AbstractCegarLoop]: Abstraction has 3293 states and 14258 transitions. [2022-11-16 19:54:28,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3293 states and 14258 transitions. [2022-11-16 19:54:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:28,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:28,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:28,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-16 19:54:28,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:28,515 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1827259192, now seen corresponding path program 1 times [2022-11-16 19:54:28,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141984131] [2022-11-16 19:54:28,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:28,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:28,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:28,517 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:28,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 19:54:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:28,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:54:28,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:28,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:28,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141984131] [2022-11-16 19:54:28,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141984131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:28,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:28,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:54:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394789724] [2022-11-16 19:54:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:28,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:54:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:54:28,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:28,850 INFO L87 Difference]: Start difference. First operand 3293 states and 14258 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:29,770 INFO L93 Difference]: Finished difference Result 3582 states and 14770 transitions. [2022-11-16 19:54:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:29,780 INFO L225 Difference]: With dead ends: 3582 [2022-11-16 19:54:29,780 INFO L226 Difference]: Without dead ends: 3582 [2022-11-16 19:54:29,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:29,781 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:29,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 4 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 19:54:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2022-11-16 19:54:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3389. [2022-11-16 19:54:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3389 states, 3283 states have (on average 4.358513554675602) internal successors, (14309), 3388 states have internal predecessors, (14309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:29,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3389 states to 3389 states and 14309 transitions. [2022-11-16 19:54:29,841 INFO L78 Accepts]: Start accepts. Automaton has 3389 states and 14309 transitions. Word has length 11 [2022-11-16 19:54:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:29,842 INFO L495 AbstractCegarLoop]: Abstraction has 3389 states and 14309 transitions. [2022-11-16 19:54:29,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:29,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3389 states and 14309 transitions. [2022-11-16 19:54:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 19:54:29,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:29,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:29,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-16 19:54:30,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:30,043 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash 77962380, now seen corresponding path program 1 times [2022-11-16 19:54:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:30,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111885145] [2022-11-16 19:54:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:30,044 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:30,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:30,045 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:30,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 19:54:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:30,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:54:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:30,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:30,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:30,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111885145] [2022-11-16 19:54:30,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111885145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [76179558] [2022-11-16 19:54:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:54:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:54:30,630 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:54:30,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-16 19:54:31,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:31,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:54:31,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:31,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [76179558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781696950] [2022-11-16 19:54:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:31,235 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:54:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-16 19:54:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:31,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:54:31,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:31,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781696950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:31,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:54:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-16 19:54:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376423023] [2022-11-16 19:54:31,647 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:54:31,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:54:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:31,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:54:31,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:54:31,648 INFO L87 Difference]: Start difference. First operand 3389 states and 14309 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:34,656 INFO L93 Difference]: Finished difference Result 6556 states and 26608 transitions. [2022-11-16 19:54:34,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:54:34,657 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 19:54:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:34,677 INFO L225 Difference]: With dead ends: 6556 [2022-11-16 19:54:34,677 INFO L226 Difference]: Without dead ends: 6556 [2022-11-16 19:54:34,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:54:34,678 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 273 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:34,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 2 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 19:54:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-11-16 19:54:34,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 4155. [2022-11-16 19:54:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4155 states, 4049 states have (on average 4.453939244257842) internal successors, (18034), 4154 states have internal predecessors, (18034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 18034 transitions. [2022-11-16 19:54:34,772 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 18034 transitions. Word has length 11 [2022-11-16 19:54:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:34,772 INFO L495 AbstractCegarLoop]: Abstraction has 4155 states and 18034 transitions. [2022-11-16 19:54:34,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:34,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 18034 transitions. [2022-11-16 19:54:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:34,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:34,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:34,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (96)] Ended with exit code 0 [2022-11-16 19:54:34,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-11-16 19:54:35,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-16 19:54:35,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:35,374 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:35,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash 25056859, now seen corresponding path program 1 times [2022-11-16 19:54:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:35,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400335929] [2022-11-16 19:54:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:35,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:35,376 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:35,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 19:54:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 19:54:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:35,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:54:35,820 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:54:35,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:54:36,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:36,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:37,310 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400335929] [2022-11-16 19:54:37,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400335929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:37,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1798703546] [2022-11-16 19:54:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:54:37,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:54:37,311 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:54:37,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-16 19:54:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:54:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:54:37,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:54:38,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:38,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:54:38,067 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:54:38,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:54:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:38,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:43,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1798703546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164438583] [2022-11-16 19:54:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:43,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:54:43,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:54:43,019 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:54:43,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-16 19:54:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:43,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:54:43,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:43,361 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:54:43,432 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:54:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:54:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:43,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:54:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:54:43,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164438583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:54:43,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:54:43,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5, 5, 7, 7] total 17 [2022-11-16 19:54:43,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861923610] [2022-11-16 19:54:43,944 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:54:43,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:54:43,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:43,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:54:43,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:54:43,945 INFO L87 Difference]: Start difference. First operand 4155 states and 18034 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:49,377 WARN L233 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:54:52,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:52,432 INFO L93 Difference]: Finished difference Result 6961 states and 27966 transitions. [2022-11-16 19:54:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 19:54:52,433 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:54:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:52,452 INFO L225 Difference]: With dead ends: 6961 [2022-11-16 19:54:52,452 INFO L226 Difference]: Without dead ends: 6961 [2022-11-16 19:54:52,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-11-16 19:54:52,452 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 172 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 647 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:52,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 0 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 488 Invalid, 0 Unknown, 647 Unchecked, 2.6s Time] [2022-11-16 19:54:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2022-11-16 19:54:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 4163. [2022-11-16 19:54:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4057 states have (on average 4.449593295538575) internal successors, (18052), 4162 states have internal predecessors, (18052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:52,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 18052 transitions. [2022-11-16 19:54:52,552 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 18052 transitions. Word has length 12 [2022-11-16 19:54:52,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:52,552 INFO L495 AbstractCegarLoop]: Abstraction has 4163 states and 18052 transitions. [2022-11-16 19:54:52,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:52,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 18052 transitions. [2022-11-16 19:54:52,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:52,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:52,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:52,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-16 19:54:52,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-16 19:54:52,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:53,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:53,154 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:53,155 INFO L85 PathProgramCache]: Analyzing trace with hash 25057025, now seen corresponding path program 1 times [2022-11-16 19:54:53,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:53,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258900042] [2022-11-16 19:54:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:53,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:53,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:53,156 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:53,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-16 19:54:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:53,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:54:53,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:53,575 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:53,576 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 33 treesize of output 44 [2022-11-16 19:54:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:53,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:53,670 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:53,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:53,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:53,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:53,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258900042] [2022-11-16 19:54:53,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258900042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:53,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:53,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:53,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549064574] [2022-11-16 19:54:53,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:53,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:53,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:53,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:53,753 INFO L87 Difference]: Start difference. First operand 4163 states and 18052 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:54,120 INFO L93 Difference]: Finished difference Result 4173 states and 18072 transitions. [2022-11-16 19:54:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:54:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:54,132 INFO L225 Difference]: With dead ends: 4173 [2022-11-16 19:54:54,133 INFO L226 Difference]: Without dead ends: 4173 [2022-11-16 19:54:54,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:54,133 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:54,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-16 19:54:54,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-11-16 19:54:54,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4165. [2022-11-16 19:54:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4165 states, 4059 states have (on average 4.448879034244888) internal successors, (18058), 4164 states have internal predecessors, (18058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4165 states to 4165 states and 18058 transitions. [2022-11-16 19:54:54,209 INFO L78 Accepts]: Start accepts. Automaton has 4165 states and 18058 transitions. Word has length 12 [2022-11-16 19:54:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:54,209 INFO L495 AbstractCegarLoop]: Abstraction has 4165 states and 18058 transitions. [2022-11-16 19:54:54,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4165 states and 18058 transitions. [2022-11-16 19:54:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:54,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:54,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:54,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:54,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:54,411 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:54,411 INFO L85 PathProgramCache]: Analyzing trace with hash 25058172, now seen corresponding path program 1 times [2022-11-16 19:54:54,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:54,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248245485] [2022-11-16 19:54:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:54,412 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:54,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:54,412 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:54,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-16 19:54:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:54,841 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:54,841 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 33 treesize of output 44 [2022-11-16 19:54:54,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:54,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:54,932 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:54,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:55,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:55,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [248245485] [2022-11-16 19:54:55,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [248245485] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:55,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:55,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95409787] [2022-11-16 19:54:55,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:55,021 INFO L87 Difference]: Start difference. First operand 4165 states and 18058 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:55,416 INFO L93 Difference]: Finished difference Result 4180 states and 18087 transitions. [2022-11-16 19:54:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:54:55,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:55,430 INFO L225 Difference]: With dead ends: 4180 [2022-11-16 19:54:55,430 INFO L226 Difference]: Without dead ends: 4180 [2022-11-16 19:54:55,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:55,430 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:55,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-16 19:54:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4180 states. [2022-11-16 19:54:55,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4180 to 4168. [2022-11-16 19:54:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4168 states, 4062 states have (on average 4.447808961102905) internal successors, (18067), 4167 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 18067 transitions. [2022-11-16 19:54:55,505 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 18067 transitions. Word has length 12 [2022-11-16 19:54:55,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:55,506 INFO L495 AbstractCegarLoop]: Abstraction has 4168 states and 18067 transitions. [2022-11-16 19:54:55,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 18067 transitions. [2022-11-16 19:54:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:55,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:55,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:55,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:55,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:55,707 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:55,707 INFO L85 PathProgramCache]: Analyzing trace with hash -333959, now seen corresponding path program 1 times [2022-11-16 19:54:55,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:55,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386310151] [2022-11-16 19:54:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:55,708 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:55,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:55,708 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:55,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 19:54:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:54:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:56,143 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:54:56,143 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 33 treesize of output 44 [2022-11-16 19:54:56,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:56,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:56,233 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:54:56,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:54:56,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:54:56,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:54:56,316 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:54:56,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386310151] [2022-11-16 19:54:56,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386310151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:54:56,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:54:56,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:54:56,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385329651] [2022-11-16 19:54:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:54:56,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:54:56,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:54:56,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:54:56,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:54:56,318 INFO L87 Difference]: Start difference. First operand 4168 states and 18067 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:54:56,669 INFO L93 Difference]: Finished difference Result 4177 states and 18081 transitions. [2022-11-16 19:54:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:54:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:54:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:54:56,680 INFO L225 Difference]: With dead ends: 4177 [2022-11-16 19:54:56,680 INFO L226 Difference]: Without dead ends: 4177 [2022-11-16 19:54:56,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:54:56,681 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:54:56,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:54:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2022-11-16 19:54:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4171. [2022-11-16 19:54:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4171 states, 4065 states have (on average 4.445510455104551) internal successors, (18071), 4170 states have internal predecessors, (18071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:54:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4171 states to 4171 states and 18071 transitions. [2022-11-16 19:54:56,792 INFO L78 Accepts]: Start accepts. Automaton has 4171 states and 18071 transitions. Word has length 12 [2022-11-16 19:54:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:54:56,793 INFO L495 AbstractCegarLoop]: Abstraction has 4171 states and 18071 transitions. [2022-11-16 19:54:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:54:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4171 states and 18071 transitions. [2022-11-16 19:54:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:54:56,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:54:56,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:54:56,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-16 19:54:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:56,994 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:54:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:54:56,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1725250, now seen corresponding path program 1 times [2022-11-16 19:54:56,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:54:56,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153321125] [2022-11-16 19:54:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:54:56,995 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:54:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:54:56,996 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:54:56,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 19:54:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:54:57,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:54:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:54:57,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:54:57,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:54:57,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:54:57,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:54:57,472 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:54:57,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:54:57,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:54:57,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:02,168 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153321125] [2022-11-16 19:55:02,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153321125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:02,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322785260] [2022-11-16 19:55:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:02,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:55:02,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:55:02,169 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:55:02,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-16 19:55:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:02,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:02,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:55:02,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:55:02,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:02,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:55:02,897 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:55:02,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:55:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:03,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:03,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322785260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:03,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038428603] [2022-11-16 19:55:03,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:03,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:55:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:55:03,248 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:55:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-16 19:55:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:03,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 19:55:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:03,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:55:03,746 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:55:03,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:55:04,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:04,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:07,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038428603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:07,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:55:07,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 7, 7] total 19 [2022-11-16 19:55:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277915838] [2022-11-16 19:55:07,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:55:07,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:55:07,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:55:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=309, Unknown=1, NotChecked=0, Total=380 [2022-11-16 19:55:07,287 INFO L87 Difference]: Start difference. First operand 4171 states and 18071 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:13,362 WARN L233 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 43 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:55:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:18,128 INFO L93 Difference]: Finished difference Result 8264 states and 33000 transitions. [2022-11-16 19:55:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 19:55:18,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:55:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:18,153 INFO L225 Difference]: With dead ends: 8264 [2022-11-16 19:55:18,153 INFO L226 Difference]: Without dead ends: 8264 [2022-11-16 19:55:18,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=206, Invalid=663, Unknown=1, NotChecked=0, Total=870 [2022-11-16 19:55:18,153 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 384 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1489 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:18,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 841 Invalid, 0 Unknown, 1489 Unchecked, 3.9s Time] [2022-11-16 19:55:18,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2022-11-16 19:55:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 4391. [2022-11-16 19:55:18,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4285 states have (on average 4.474679113185531) internal successors, (19174), 4390 states have internal predecessors, (19174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 19174 transitions. [2022-11-16 19:55:18,268 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 19174 transitions. Word has length 12 [2022-11-16 19:55:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:18,269 INFO L495 AbstractCegarLoop]: Abstraction has 4391 states and 19174 transitions. [2022-11-16 19:55:18,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 19174 transitions. [2022-11-16 19:55:18,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:18,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:18,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:18,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2022-11-16 19:55:18,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:18,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Ended with exit code 0 [2022-11-16 19:55:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:18,870 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1725084, now seen corresponding path program 1 times [2022-11-16 19:55:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:18,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652821143] [2022-11-16 19:55:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:18,871 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:18,872 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:18,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-16 19:55:19,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:55:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:19,309 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:19,309 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 33 treesize of output 44 [2022-11-16 19:55:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:19,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:19,405 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:19,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:19,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:19,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:19,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652821143] [2022-11-16 19:55:19,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652821143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:19,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:19,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300392882] [2022-11-16 19:55:19,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:19,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:19,485 INFO L87 Difference]: Start difference. First operand 4391 states and 19174 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:19,854 INFO L93 Difference]: Finished difference Result 4389 states and 19158 transitions. [2022-11-16 19:55:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:19,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:19,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:19,868 INFO L225 Difference]: With dead ends: 4389 [2022-11-16 19:55:19,868 INFO L226 Difference]: Without dead ends: 4389 [2022-11-16 19:55:19,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:19,869 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:19,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:19,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2022-11-16 19:55:20,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 4389. [2022-11-16 19:55:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4389 states, 4283 states have (on average 4.473032920849872) internal successors, (19158), 4388 states have internal predecessors, (19158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4389 states to 4389 states and 19158 transitions. [2022-11-16 19:55:20,025 INFO L78 Accepts]: Start accepts. Automaton has 4389 states and 19158 transitions. Word has length 12 [2022-11-16 19:55:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:20,025 INFO L495 AbstractCegarLoop]: Abstraction has 4389 states and 19158 transitions. [2022-11-16 19:55:20,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:20,025 INFO L276 IsEmpty]: Start isEmpty. Operand 4389 states and 19158 transitions. [2022-11-16 19:55:20,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:20,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:20,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:20,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:20,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:20,226 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:20,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:20,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1723937, now seen corresponding path program 1 times [2022-11-16 19:55:20,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:20,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667040428] [2022-11-16 19:55:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:20,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:20,230 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:20,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-16 19:55:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:55:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:20,668 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:20,668 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 33 treesize of output 44 [2022-11-16 19:55:20,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:20,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:20,764 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:20,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:20,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:20,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:20,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667040428] [2022-11-16 19:55:20,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667040428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:20,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:20,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:20,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669821651] [2022-11-16 19:55:20,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:20,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:20,842 INFO L87 Difference]: Start difference. First operand 4389 states and 19158 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:21,205 INFO L93 Difference]: Finished difference Result 4396 states and 19176 transitions. [2022-11-16 19:55:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:21,218 INFO L225 Difference]: With dead ends: 4396 [2022-11-16 19:55:21,218 INFO L226 Difference]: Without dead ends: 4396 [2022-11-16 19:55:21,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:21,218 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:21,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2022-11-16 19:55:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4386. [2022-11-16 19:55:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4386 states, 4280 states have (on average 4.4740654205607475) internal successors, (19149), 4385 states have internal predecessors, (19149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4386 states to 4386 states and 19149 transitions. [2022-11-16 19:55:21,298 INFO L78 Accepts]: Start accepts. Automaton has 4386 states and 19149 transitions. Word has length 12 [2022-11-16 19:55:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:21,298 INFO L495 AbstractCegarLoop]: Abstraction has 4386 states and 19149 transitions. [2022-11-16 19:55:21,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4386 states and 19149 transitions. [2022-11-16 19:55:21,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:21,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:21,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:21,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:21,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:21,500 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 49352903, now seen corresponding path program 1 times [2022-11-16 19:55:21,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:21,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385112676] [2022-11-16 19:55:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:21,501 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 [2022-11-16 19:55:21,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:21,502 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:21,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-16 19:55:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:21,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:55:21,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:22,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:22,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:22,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385112676] [2022-11-16 19:55:22,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385112676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:22,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1436177979] [2022-11-16 19:55:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:22,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:55:22,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:55:22,391 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:55:22,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-16 19:55:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:22,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:22,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:23,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:23,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1436177979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021376270] [2022-11-16 19:55:23,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:23,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:55:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:55:23,261 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:55:23,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-16 19:55:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:23,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:55:23,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:23,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:23,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021376270] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:55:23,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:55:23,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 18 [2022-11-16 19:55:23,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343849802] [2022-11-16 19:55:23,770 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:55:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 19:55:23,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 19:55:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-16 19:55:23,771 INFO L87 Difference]: Start difference. First operand 4386 states and 19149 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:28,637 INFO L93 Difference]: Finished difference Result 16134 states and 67433 transitions. [2022-11-16 19:55:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 19:55:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:55:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:28,693 INFO L225 Difference]: With dead ends: 16134 [2022-11-16 19:55:28,693 INFO L226 Difference]: Without dead ends: 16134 [2022-11-16 19:55:28,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=173, Invalid=427, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:55:28,694 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 665 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:28,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 31 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-16 19:55:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2022-11-16 19:55:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 5291. [2022-11-16 19:55:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5291 states, 5185 states have (on average 4.50221793635487) internal successors, (23344), 5290 states have internal predecessors, (23344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5291 states to 5291 states and 23344 transitions. [2022-11-16 19:55:28,887 INFO L78 Accepts]: Start accepts. Automaton has 5291 states and 23344 transitions. Word has length 12 [2022-11-16 19:55:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:28,887 INFO L495 AbstractCegarLoop]: Abstraction has 5291 states and 23344 transitions. [2022-11-16 19:55:28,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5291 states and 23344 transitions. [2022-11-16 19:55:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:28,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:28,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:28,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-16 19:55:29,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:29,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-16 19:55:29,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:55:29,489 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:29,489 INFO L85 PathProgramCache]: Analyzing trace with hash 49348119, now seen corresponding path program 1 times [2022-11-16 19:55:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1821647177] [2022-11-16 19:55:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:29,491 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:29,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 19:55:29,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:29,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:55:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:29,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:29,895 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1821647177] [2022-11-16 19:55:29,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1821647177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:29,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:29,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:55:29,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229338456] [2022-11-16 19:55:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:29,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:55:29,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:29,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:55:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:29,896 INFO L87 Difference]: Start difference. First operand 5291 states and 23344 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-16 19:55:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:30,756 INFO L93 Difference]: Finished difference Result 7992 states and 33685 transitions. [2022-11-16 19:55:30,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:30,757 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-11-16 19:55:30,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:30,781 INFO L225 Difference]: With dead ends: 7992 [2022-11-16 19:55:30,781 INFO L226 Difference]: Without dead ends: 7992 [2022-11-16 19:55:30,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:55:30,781 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 182 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:30,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:55:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7992 states. [2022-11-16 19:55:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7992 to 5823. [2022-11-16 19:55:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5823 states, 5717 states have (on average 4.536470176666084) internal successors, (25935), 5822 states have internal predecessors, (25935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5823 states to 5823 states and 25935 transitions. [2022-11-16 19:55:30,908 INFO L78 Accepts]: Start accepts. Automaton has 5823 states and 25935 transitions. Word has length 12 [2022-11-16 19:55:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:30,908 INFO L495 AbstractCegarLoop]: Abstraction has 5823 states and 25935 transitions. [2022-11-16 19:55:30,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-16 19:55:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5823 states and 25935 transitions. [2022-11-16 19:55:30,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:30,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:30,909 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:30,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:31,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:31,111 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:31,111 INFO L85 PathProgramCache]: Analyzing trace with hash 49348129, now seen corresponding path program 1 times [2022-11-16 19:55:31,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:31,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1981651917] [2022-11-16 19:55:31,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:31,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:31,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:31,112 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:31,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-16 19:55:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:31,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:31,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:31,541 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:31,541 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 33 treesize of output 44 [2022-11-16 19:55:31,580 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:55:31,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 19:55:31,627 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:55:31,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 19:55:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:31,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:31,755 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1981651917] [2022-11-16 19:55:31,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1981651917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:31,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:31,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:55:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7021195] [2022-11-16 19:55:31,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:31,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:55:31,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:55:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:31,757 INFO L87 Difference]: Start difference. First operand 5823 states and 25935 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-16 19:55:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:32,256 INFO L93 Difference]: Finished difference Result 5802 states and 25836 transitions. [2022-11-16 19:55:32,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:32,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2022-11-16 19:55:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:32,284 INFO L225 Difference]: With dead ends: 5802 [2022-11-16 19:55:32,284 INFO L226 Difference]: Without dead ends: 5802 [2022-11-16 19:55:32,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:32,284 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:32,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-11-16 19:55:32,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2022-11-16 19:55:32,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 5799. [2022-11-16 19:55:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5799 states, 5693 states have (on average 4.536623924117337) internal successors, (25827), 5798 states have internal predecessors, (25827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:32,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5799 states to 5799 states and 25827 transitions. [2022-11-16 19:55:32,440 INFO L78 Accepts]: Start accepts. Automaton has 5799 states and 25827 transitions. Word has length 12 [2022-11-16 19:55:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:32,440 INFO L495 AbstractCegarLoop]: Abstraction has 5799 states and 25827 transitions. [2022-11-16 19:55:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-11-16 19:55:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 5799 states and 25827 transitions. [2022-11-16 19:55:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:32,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:32,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:32,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:32,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:32,651 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:32,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:32,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1215759343, now seen corresponding path program 1 times [2022-11-16 19:55:32,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:32,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672696164] [2022-11-16 19:55:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:32,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:32,652 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:32,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 19:55:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:55:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:33,057 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:33,057 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 33 treesize of output 44 [2022-11-16 19:55:33,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:33,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:33,158 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:33,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:33,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:33,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:33,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672696164] [2022-11-16 19:55:33,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672696164] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:33,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:33,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:33,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250050943] [2022-11-16 19:55:33,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:33,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:33,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:33,242 INFO L87 Difference]: Start difference. First operand 5799 states and 25827 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:33,621 INFO L93 Difference]: Finished difference Result 5821 states and 25876 transitions. [2022-11-16 19:55:33,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:33,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:33,639 INFO L225 Difference]: With dead ends: 5821 [2022-11-16 19:55:33,639 INFO L226 Difference]: Without dead ends: 5821 [2022-11-16 19:55:33,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:33,639 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2022-11-16 19:55:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 5807. [2022-11-16 19:55:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 5701 states have (on average 4.534643045079811) internal successors, (25852), 5806 states have internal predecessors, (25852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 25852 transitions. [2022-11-16 19:55:33,745 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 25852 transitions. Word has length 12 [2022-11-16 19:55:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:33,745 INFO L495 AbstractCegarLoop]: Abstraction has 5807 states and 25852 transitions. [2022-11-16 19:55:33,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 25852 transitions. [2022-11-16 19:55:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:33,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:33,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:33,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:33,947 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2002883567, now seen corresponding path program 1 times [2022-11-16 19:55:33,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:33,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094889520] [2022-11-16 19:55:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:33,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:33,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:33,949 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:33,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-16 19:55:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:55:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:34,350 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:34,350 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 33 treesize of output 44 [2022-11-16 19:55:34,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:34,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:34,440 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:34,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:34,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:34,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:34,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094889520] [2022-11-16 19:55:34,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094889520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:34,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:34,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983504911] [2022-11-16 19:55:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:34,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:34,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:34,536 INFO L87 Difference]: Start difference. First operand 5807 states and 25852 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:34,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:34,922 INFO L93 Difference]: Finished difference Result 5827 states and 25891 transitions. [2022-11-16 19:55:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:34,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:34,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:34,939 INFO L225 Difference]: With dead ends: 5827 [2022-11-16 19:55:34,939 INFO L226 Difference]: Without dead ends: 5827 [2022-11-16 19:55:34,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:34,940 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:34,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5827 states. [2022-11-16 19:55:35,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5827 to 5817. [2022-11-16 19:55:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5817 states, 5711 states have (on average 4.530379968481877) internal successors, (25873), 5816 states have internal predecessors, (25873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5817 states to 5817 states and 25873 transitions. [2022-11-16 19:55:35,096 INFO L78 Accepts]: Start accepts. Automaton has 5817 states and 25873 transitions. Word has length 12 [2022-11-16 19:55:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:35,097 INFO L495 AbstractCegarLoop]: Abstraction has 5817 states and 25873 transitions. [2022-11-16 19:55:35,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5817 states and 25873 transitions. [2022-11-16 19:55:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:35,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:35,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:35,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:35,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:35,298 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2002882420, now seen corresponding path program 1 times [2022-11-16 19:55:35,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:35,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844631237] [2022-11-16 19:55:35,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:35,299 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:35,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:35,300 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:35,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-16 19:55:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:35,701 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:35,701 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 33 treesize of output 44 [2022-11-16 19:55:35,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:35,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:35,797 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:35,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:35,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:35,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:35,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844631237] [2022-11-16 19:55:35,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844631237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:35,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:35,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:35,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130107917] [2022-11-16 19:55:35,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:35,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:35,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:35,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:35,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:35,875 INFO L87 Difference]: Start difference. First operand 5817 states and 25873 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:36,244 INFO L93 Difference]: Finished difference Result 5833 states and 25904 transitions. [2022-11-16 19:55:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:36,263 INFO L225 Difference]: With dead ends: 5833 [2022-11-16 19:55:36,263 INFO L226 Difference]: Without dead ends: 5833 [2022-11-16 19:55:36,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:36,263 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:36,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5833 states. [2022-11-16 19:55:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5833 to 5815. [2022-11-16 19:55:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5815 states, 5709 states have (on average 4.53231739358907) internal successors, (25875), 5814 states have internal predecessors, (25875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5815 states to 5815 states and 25875 transitions. [2022-11-16 19:55:36,370 INFO L78 Accepts]: Start accepts. Automaton has 5815 states and 25875 transitions. Word has length 12 [2022-11-16 19:55:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:36,370 INFO L495 AbstractCegarLoop]: Abstraction has 5815 states and 25875 transitions. [2022-11-16 19:55:36,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:36,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5815 states and 25875 transitions. [2022-11-16 19:55:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:36,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:36,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:36,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:36,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:36,572 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:36,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2046004722, now seen corresponding path program 1 times [2022-11-16 19:55:36,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:36,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881816266] [2022-11-16 19:55:36,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:36,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:36,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:36,573 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:36,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-16 19:55:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:36,973 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:36,974 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 33 treesize of output 44 [2022-11-16 19:55:37,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:37,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:37,062 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:37,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:37,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:37,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:37,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881816266] [2022-11-16 19:55:37,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881816266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:37,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:37,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21015489] [2022-11-16 19:55:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:37,144 INFO L87 Difference]: Start difference. First operand 5815 states and 25875 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:37,505 INFO L93 Difference]: Finished difference Result 5822 states and 25893 transitions. [2022-11-16 19:55:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:37,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:37,524 INFO L225 Difference]: With dead ends: 5822 [2022-11-16 19:55:37,524 INFO L226 Difference]: Without dead ends: 5822 [2022-11-16 19:55:37,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:37,524 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:37,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2022-11-16 19:55:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 5803. [2022-11-16 19:55:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5697 states have (on average 4.535545023696683) internal successors, (25839), 5802 states have internal predecessors, (25839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:37,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 25839 transitions. [2022-11-16 19:55:37,648 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 25839 transitions. Word has length 12 [2022-11-16 19:55:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:37,649 INFO L495 AbstractCegarLoop]: Abstraction has 5803 states and 25839 transitions. [2022-11-16 19:55:37,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 25839 transitions. [2022-11-16 19:55:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:37,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:37,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:37,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:37,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:37,850 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:37,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1311251889, now seen corresponding path program 1 times [2022-11-16 19:55:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:37,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275164196] [2022-11-16 19:55:37,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:37,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:37,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:37,852 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:37,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-16 19:55:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:38,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:38,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:38,259 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:38,259 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 33 treesize of output 44 [2022-11-16 19:55:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:38,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:38,349 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:38,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:38,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:38,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:38,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275164196] [2022-11-16 19:55:38,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275164196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:38,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:38,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:38,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627949986] [2022-11-16 19:55:38,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:38,439 INFO L87 Difference]: Start difference. First operand 5803 states and 25839 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:38,821 INFO L93 Difference]: Finished difference Result 5831 states and 25896 transitions. [2022-11-16 19:55:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:38,839 INFO L225 Difference]: With dead ends: 5831 [2022-11-16 19:55:38,839 INFO L226 Difference]: Without dead ends: 5831 [2022-11-16 19:55:38,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:38,839 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:38,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-11-16 19:55:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5804. [2022-11-16 19:55:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 5698 states have (on average 4.535275535275535) internal successors, (25842), 5803 states have internal predecessors, (25842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 25842 transitions. [2022-11-16 19:55:38,945 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 25842 transitions. Word has length 12 [2022-11-16 19:55:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:38,946 INFO L495 AbstractCegarLoop]: Abstraction has 5804 states and 25842 transitions. [2022-11-16 19:55:38,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 25842 transitions. [2022-11-16 19:55:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:38,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:38,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:38,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:39,147 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2098376113, now seen corresponding path program 1 times [2022-11-16 19:55:39,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:39,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076481818] [2022-11-16 19:55:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:39,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:39,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:39,148 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:39,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-16 19:55:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:39,564 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:39,564 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 33 treesize of output 44 [2022-11-16 19:55:39,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:39,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:39,668 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:39,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:39,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:39,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:39,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076481818] [2022-11-16 19:55:39,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076481818] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:39,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:39,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:39,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843874268] [2022-11-16 19:55:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:39,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:39,799 INFO L87 Difference]: Start difference. First operand 5804 states and 25842 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:40,200 INFO L93 Difference]: Finished difference Result 5822 states and 25884 transitions. [2022-11-16 19:55:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:40,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:40,221 INFO L225 Difference]: With dead ends: 5822 [2022-11-16 19:55:40,221 INFO L226 Difference]: Without dead ends: 5822 [2022-11-16 19:55:40,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:40,222 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:40,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2022-11-16 19:55:40,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 5803. [2022-11-16 19:55:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5697 states have (on average 4.535545023696683) internal successors, (25839), 5802 states have internal predecessors, (25839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 25839 transitions. [2022-11-16 19:55:40,351 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 25839 transitions. Word has length 12 [2022-11-16 19:55:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:40,352 INFO L495 AbstractCegarLoop]: Abstraction has 5803 states and 25839 transitions. [2022-11-16 19:55:40,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 25839 transitions. [2022-11-16 19:55:40,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:40,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:40,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:40,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Ended with exit code 0 [2022-11-16 19:55:40,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:40,553 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:40,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:40,553 INFO L85 PathProgramCache]: Analyzing trace with hash -2098374966, now seen corresponding path program 1 times [2022-11-16 19:55:40,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:40,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864796826] [2022-11-16 19:55:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:40,554 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:40,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-16 19:55:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:40,990 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:40,991 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 33 treesize of output 44 [2022-11-16 19:55:41,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:41,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:41,078 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:41,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:41,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:41,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:41,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864796826] [2022-11-16 19:55:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864796826] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:41,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:41,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124193203] [2022-11-16 19:55:41,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:41,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:41,171 INFO L87 Difference]: Start difference. First operand 5803 states and 25839 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:41,557 INFO L93 Difference]: Finished difference Result 5826 states and 25888 transitions. [2022-11-16 19:55:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:41,576 INFO L225 Difference]: With dead ends: 5826 [2022-11-16 19:55:41,576 INFO L226 Difference]: Without dead ends: 5826 [2022-11-16 19:55:41,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:41,576 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:41,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:41,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2022-11-16 19:55:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 5797. [2022-11-16 19:55:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5797 states, 5691 states have (on average 4.5385696714109995) internal successors, (25829), 5796 states have internal predecessors, (25829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5797 states to 5797 states and 25829 transitions. [2022-11-16 19:55:41,684 INFO L78 Accepts]: Start accepts. Automaton has 5797 states and 25829 transitions. Word has length 12 [2022-11-16 19:55:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:41,685 INFO L495 AbstractCegarLoop]: Abstraction has 5797 states and 25829 transitions. [2022-11-16 19:55:41,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5797 states and 25829 transitions. [2022-11-16 19:55:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:41,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:41,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:41,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Ended with exit code 0 [2022-11-16 19:55:41,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:41,886 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2141497268, now seen corresponding path program 1 times [2022-11-16 19:55:41,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:41,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287566741] [2022-11-16 19:55:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:41,888 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:41,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-16 19:55:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:42,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:55:42,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:42,318 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:42,319 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 33 treesize of output 44 [2022-11-16 19:55:42,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:42,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:42,405 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:42,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:42,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:42,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:42,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287566741] [2022-11-16 19:55:42,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287566741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:42,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:42,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:42,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485575738] [2022-11-16 19:55:42,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:42,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:42,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:42,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:42,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:42,493 INFO L87 Difference]: Start difference. First operand 5797 states and 25829 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:42,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:42,870 INFO L93 Difference]: Finished difference Result 5810 states and 25865 transitions. [2022-11-16 19:55:42,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:42,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:42,887 INFO L225 Difference]: With dead ends: 5810 [2022-11-16 19:55:42,888 INFO L226 Difference]: Without dead ends: 5810 [2022-11-16 19:55:42,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:42,888 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:42,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 19:55:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2022-11-16 19:55:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 5777. [2022-11-16 19:55:42,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5671 states have (on average 4.543995767942162) internal successors, (25769), 5776 states have internal predecessors, (25769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:42,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 25769 transitions. [2022-11-16 19:55:42,995 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 25769 transitions. Word has length 12 [2022-11-16 19:55:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:42,995 INFO L495 AbstractCegarLoop]: Abstraction has 5777 states and 25769 transitions. [2022-11-16 19:55:42,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 25769 transitions. [2022-11-16 19:55:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:42,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:42,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:43,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-16 19:55:43,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:43,197 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:43,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:43,197 INFO L85 PathProgramCache]: Analyzing trace with hash 247099199, now seen corresponding path program 1 times [2022-11-16 19:55:43,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:43,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1537333338] [2022-11-16 19:55:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:43,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:43,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:43,199 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-16 19:55:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:43,598 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:55:43,599 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 33 treesize of output 44 [2022-11-16 19:55:43,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:43,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:43,688 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 19:55:43,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:55:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:55:43,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:43,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:43,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1537333338] [2022-11-16 19:55:43,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1537333338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:43,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:43,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:55:43,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857746823] [2022-11-16 19:55:43,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:43,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:55:43,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:55:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:55:43,784 INFO L87 Difference]: Start difference. First operand 5777 states and 25769 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:44,204 INFO L93 Difference]: Finished difference Result 5809 states and 25849 transitions. [2022-11-16 19:55:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 [2022-11-16 19:55:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:44,224 INFO L225 Difference]: With dead ends: 5809 [2022-11-16 19:55:44,224 INFO L226 Difference]: Without dead ends: 5809 [2022-11-16 19:55:44,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:44,225 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:44,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2022-11-16 19:55:44,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5809 states. [2022-11-16 19:55:44,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5809 to 5795. [2022-11-16 19:55:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5689 states have (on average 4.539110564246792) internal successors, (25823), 5794 states have internal predecessors, (25823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 25823 transitions. [2022-11-16 19:55:44,424 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 25823 transitions. Word has length 12 [2022-11-16 19:55:44,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:44,424 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 25823 transitions. [2022-11-16 19:55:44,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-16 19:55:44,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 25823 transitions. [2022-11-16 19:55:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:44,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:44,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:44,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:44,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:44,625 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:44,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:44,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1870319434, now seen corresponding path program 1 times [2022-11-16 19:55:44,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:44,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743221007] [2022-11-16 19:55:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:44,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:44,627 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:44,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Waiting until timeout for monitored process [2022-11-16 19:55:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:45,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:45,187 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 19:55:45,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 19:55:45,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:45,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 19:55:45,313 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:55:45,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 19:55:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:45,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:45,495 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:45,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743221007] [2022-11-16 19:55:45,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743221007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:45,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:45,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:55:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518204457] [2022-11-16 19:55:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:45,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:55:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:55:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:45,497 INFO L87 Difference]: Start difference. First operand 5795 states and 25823 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:45,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:45,891 INFO L93 Difference]: Finished difference Result 5806 states and 25859 transitions. [2022-11-16 19:55:45,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:55:45,892 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-11-16 19:55:45,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:45,913 INFO L225 Difference]: With dead ends: 5806 [2022-11-16 19:55:45,913 INFO L226 Difference]: Without dead ends: 5806 [2022-11-16 19:55:45,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:45,914 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:45,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-11-16 19:55:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-11-16 19:55:46,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5797. [2022-11-16 19:55:46,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5797 states, 5691 states have (on average 4.539272535582499) internal successors, (25833), 5796 states have internal predecessors, (25833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5797 states to 5797 states and 25833 transitions. [2022-11-16 19:55:46,066 INFO L78 Accepts]: Start accepts. Automaton has 5797 states and 25833 transitions. Word has length 12 [2022-11-16 19:55:46,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:46,066 INFO L495 AbstractCegarLoop]: Abstraction has 5797 states and 25833 transitions. [2022-11-16 19:55:46,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5797 states and 25833 transitions. [2022-11-16 19:55:46,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:46,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:46,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:46,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (123)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:46,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:46,268 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:46,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1870285954, now seen corresponding path program 2 times [2022-11-16 19:55:46,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:46,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [558014745] [2022-11-16 19:55:46,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:55:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:46,270 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:46,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-16 19:55:46,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 19:55:46,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:55:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:46,714 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 19:55:46,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 19:55:46,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:46,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 19:55:46,849 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:55:46,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 19:55:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:47,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:47,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [558014745] [2022-11-16 19:55:47,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [558014745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:47,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:47,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:55:47,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684241140] [2022-11-16 19:55:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:47,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:55:47,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:47,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:55:47,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:47,026 INFO L87 Difference]: Start difference. First operand 5797 states and 25833 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:47,453 INFO L93 Difference]: Finished difference Result 5806 states and 25860 transitions. [2022-11-16 19:55:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:55:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-11-16 19:55:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:47,473 INFO L225 Difference]: With dead ends: 5806 [2022-11-16 19:55:47,473 INFO L226 Difference]: Without dead ends: 5806 [2022-11-16 19:55:47,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:47,474 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:47,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-11-16 19:55:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5806 states. [2022-11-16 19:55:47,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5806 to 5799. [2022-11-16 19:55:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5799 states, 5693 states have (on average 4.538731775865098) internal successors, (25839), 5798 states have internal predecessors, (25839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5799 states to 5799 states and 25839 transitions. [2022-11-16 19:55:47,616 INFO L78 Accepts]: Start accepts. Automaton has 5799 states and 25839 transitions. Word has length 12 [2022-11-16 19:55:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:47,616 INFO L495 AbstractCegarLoop]: Abstraction has 5799 states and 25839 transitions. [2022-11-16 19:55:47,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5799 states and 25839 transitions. [2022-11-16 19:55:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:47,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:47,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:47,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-11-16 19:55:47,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:47,818 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:47,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1878196180, now seen corresponding path program 1 times [2022-11-16 19:55:47,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:47,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [646720233] [2022-11-16 19:55:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:47,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:47,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:47,820 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Waiting until timeout for monitored process [2022-11-16 19:55:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:48,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:55:48,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:48,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:48,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:48,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [646720233] [2022-11-16 19:55:48,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [646720233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:48,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:48,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:55:48,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671355309] [2022-11-16 19:55:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:48,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:55:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:48,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:55:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:48,235 INFO L87 Difference]: Start difference. First operand 5799 states and 25839 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-16 19:55:49,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:49,169 INFO L93 Difference]: Finished difference Result 8731 states and 37664 transitions. [2022-11-16 19:55:49,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:49,170 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-11-16 19:55:49,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:49,201 INFO L225 Difference]: With dead ends: 8731 [2022-11-16 19:55:49,201 INFO L226 Difference]: Without dead ends: 8731 [2022-11-16 19:55:49,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:55:49,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 184 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:49,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:55:49,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8731 states. [2022-11-16 19:55:49,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8731 to 5802. [2022-11-16 19:55:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5802 states, 5696 states have (on average 4.537394662921348) internal successors, (25845), 5801 states have internal predecessors, (25845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5802 states to 5802 states and 25845 transitions. [2022-11-16 19:55:49,348 INFO L78 Accepts]: Start accepts. Automaton has 5802 states and 25845 transitions. Word has length 12 [2022-11-16 19:55:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:49,348 INFO L495 AbstractCegarLoop]: Abstraction has 5802 states and 25845 transitions. [2022-11-16 19:55:49,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-16 19:55:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 5802 states and 25845 transitions. [2022-11-16 19:55:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:49,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:49,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:49,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (125)] Ended with exit code 0 [2022-11-16 19:55:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:49,555 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1878127714, now seen corresponding path program 3 times [2022-11-16 19:55:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169161299] [2022-11-16 19:55:49,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:55:49,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:49,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:49,556 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:49,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-16 19:55:49,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 19:55:49,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:55:49,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:55:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:50,027 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-16 19:55:50,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-16 19:55:50,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:50,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 19:55:50,161 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:55:50,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 19:55:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:55:50,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:50,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:50,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169161299] [2022-11-16 19:55:50,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169161299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:50,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:55:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264379007] [2022-11-16 19:55:50,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:50,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:55:50,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:55:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:50,377 INFO L87 Difference]: Start difference. First operand 5802 states and 25845 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:50,761 INFO L93 Difference]: Finished difference Result 5885 states and 26239 transitions. [2022-11-16 19:55:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:55:50,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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 [2022-11-16 19:55:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:50,782 INFO L225 Difference]: With dead ends: 5885 [2022-11-16 19:55:50,782 INFO L226 Difference]: Without dead ends: 5885 [2022-11-16 19:55:50,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:55:50,782 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:50,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-11-16 19:55:50,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2022-11-16 19:55:50,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5804. [2022-11-16 19:55:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5804 states, 5698 states have (on average 4.536504036504036) internal successors, (25849), 5803 states have internal predecessors, (25849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5804 states to 5804 states and 25849 transitions. [2022-11-16 19:55:50,906 INFO L78 Accepts]: Start accepts. Automaton has 5804 states and 25849 transitions. Word has length 12 [2022-11-16 19:55:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:50,906 INFO L495 AbstractCegarLoop]: Abstraction has 5804 states and 25849 transitions. [2022-11-16 19:55:50,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 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) [2022-11-16 19:55:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5804 states and 25849 transitions. [2022-11-16 19:55:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:50,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:50,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:50,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:51,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:51,108 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:51,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash 577135335, now seen corresponding path program 1 times [2022-11-16 19:55:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:51,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [237055268] [2022-11-16 19:55:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:55:51,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:51,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:51,109 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:51,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Waiting until timeout for monitored process [2022-11-16 19:55:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:55:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:55:51,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:51,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:55:51,531 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:55:51,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [237055268] [2022-11-16 19:55:51,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [237055268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:55:51,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:55:51,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:55:51,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281440302] [2022-11-16 19:55:51,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:55:51,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:55:51,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:55:51,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:55:51,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:55:51,532 INFO L87 Difference]: Start difference. First operand 5804 states and 25849 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-16 19:55:52,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:55:52,588 INFO L93 Difference]: Finished difference Result 6067 states and 26161 transitions. [2022-11-16 19:55:52,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:55:52,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 [2022-11-16 19:55:52,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:55:52,611 INFO L225 Difference]: With dead ends: 6067 [2022-11-16 19:55:52,611 INFO L226 Difference]: Without dead ends: 6067 [2022-11-16 19:55:52,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:55:52,611 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 83 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:55:52,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 5 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:55:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2022-11-16 19:55:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5705. [2022-11-16 19:55:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 5599 states have (on average 4.487408465797464) internal successors, (25125), 5704 states have internal predecessors, (25125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:55:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 25125 transitions. [2022-11-16 19:55:52,764 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 25125 transitions. Word has length 12 [2022-11-16 19:55:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:55:52,764 INFO L495 AbstractCegarLoop]: Abstraction has 5705 states and 25125 transitions. [2022-11-16 19:55:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) [2022-11-16 19:55:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 25125 transitions. [2022-11-16 19:55:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:55:52,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:55:52,766 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:55:52,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (127)] Forceful destruction successful, exit code 0 [2022-11-16 19:55:52,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:52,966 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:55:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:55:52,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1172161477, now seen corresponding path program 2 times [2022-11-16 19:55:52,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:55:52,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699435318] [2022-11-16 19:55:52,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:55:52,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:55:52,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:55:52,968 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:55:52,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-16 19:55:53,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:55:53,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:55:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 19:55:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:55:53,512 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-16 19:55:53,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-16 19:55:53,667 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:55:53,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:55:53,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:55:53,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:55:53,779 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:55:53,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:55:53,845 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:55:53,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:55:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:55:54,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:55:57,171 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) c_~get1~0.offset)) (.cse2 (bvadd (_ bv8 32) c_~get1~0.offset))) (and (forall ((|v_ULTIMATE.start_create_fresh_int_array_~size#1_275| (_ BitVec 32))) (or (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_275| (_ bv1073741823 32))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_275|) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (_ BitVec 32))) (let ((.cse1 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_275|)) c_~get1~0.base))) (or (not (bvule .cse0 .cse1)) (bvule .cse2 .cse1)))))) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_int_array_~size#1_275| (_ BitVec 32))) (or (not (bvule |v_ULTIMATE.start_create_fresh_int_array_~size#1_275| (_ bv1073741823 32))) (bvslt (_ bv0 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_275|) (not (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_267| (bvmul (_ bv4 32) |v_ULTIMATE.start_create_fresh_int_array_~size#1_275|)) c_~get1~0.base))))) (bvule .cse0 .cse2)))) is different from false [2022-11-16 19:56:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:56:04,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:04,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699435318] [2022-11-16 19:56:04,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699435318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:04,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448870007] [2022-11-16 19:56:04,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:56:04,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:56:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:56:04,931 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:56:04,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-16 19:56:05,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:56:05,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:56:05,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:56:05,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:06,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:06,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:06,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448870007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:06,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535637932] [2022-11-16 19:56:06,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:56:06,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:06,920 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:06,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-11-16 19:56:07,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:56:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:56:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:56:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:07,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:08,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535637932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:08,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:56:08,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6, 6, 6, 6] total 34 [2022-11-16 19:56:08,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885756369] [2022-11-16 19:56:08,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:08,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 19:56:08,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 19:56:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=977, Unknown=3, NotChecked=64, Total=1190 [2022-11-16 19:56:08,227 INFO L87 Difference]: Start difference. First operand 5705 states and 25125 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 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) [2022-11-16 19:56:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:26,025 INFO L93 Difference]: Finished difference Result 14030 states and 57346 transitions. [2022-11-16 19:56:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-16 19:56:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 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 12 [2022-11-16 19:56:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:26,092 INFO L225 Difference]: With dead ends: 14030 [2022-11-16 19:56:26,092 INFO L226 Difference]: Without dead ends: 14030 [2022-11-16 19:56:26,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=748, Invalid=4365, Unknown=3, NotChecked=140, Total=5256 [2022-11-16 19:56:26,093 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2612 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3669 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:26,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 0 Invalid, 6322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2612 Invalid, 0 Unknown, 3669 Unchecked, 11.1s Time] [2022-11-16 19:56:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14030 states. [2022-11-16 19:56:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14030 to 7137. [2022-11-16 19:56:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7137 states, 7031 states have (on average 4.666903712131987) internal successors, (32813), 7136 states have internal predecessors, (32813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7137 states to 7137 states and 32813 transitions. [2022-11-16 19:56:26,359 INFO L78 Accepts]: Start accepts. Automaton has 7137 states and 32813 transitions. Word has length 12 [2022-11-16 19:56:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:26,359 INFO L495 AbstractCegarLoop]: Abstraction has 7137 states and 32813 transitions. [2022-11-16 19:56:26,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 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) [2022-11-16 19:56:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 7137 states and 32813 transitions. [2022-11-16 19:56:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:56:26,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:26,361 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:26,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:26,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (129)] Ended with exit code 0 [2022-11-16 19:56:26,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:26,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:26,962 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:26,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1172161264, now seen corresponding path program 1 times [2022-11-16 19:56:26,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:26,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731028241] [2022-11-16 19:56:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:26,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:26,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:26,963 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:26,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Waiting until timeout for monitored process [2022-11-16 19:56:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:27,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:56:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:27,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:27,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731028241] [2022-11-16 19:56:27,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731028241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [466909281] [2022-11-16 19:56:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:27,790 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:56:27,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:56:27,791 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:56:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (132)] Waiting until timeout for monitored process [2022-11-16 19:56:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:56:28,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:28,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:28,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [466909281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:28,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477368135] [2022-11-16 19:56:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:28,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:28,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:28,622 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:28,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-11-16 19:56:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 19:56:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:29,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:56:29,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477368135] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:29,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:56:29,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2022-11-16 19:56:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351620672] [2022-11-16 19:56:29,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 19:56:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 19:56:29,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 19:56:29,182 INFO L87 Difference]: Start difference. First operand 7137 states and 32813 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:33,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:33,414 INFO L93 Difference]: Finished difference Result 10048 states and 42320 transitions. [2022-11-16 19:56:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:56:33,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:56:33,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:33,452 INFO L225 Difference]: With dead ends: 10048 [2022-11-16 19:56:33,453 INFO L226 Difference]: Without dead ends: 10048 [2022-11-16 19:56:33,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-11-16 19:56:33,453 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 288 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:33,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 2 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-16 19:56:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10048 states. [2022-11-16 19:56:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10048 to 5775. [2022-11-16 19:56:33,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5775 states, 5669 states have (on average 4.494090668548245) internal successors, (25477), 5774 states have internal predecessors, (25477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5775 states to 5775 states and 25477 transitions. [2022-11-16 19:56:33,654 INFO L78 Accepts]: Start accepts. Automaton has 5775 states and 25477 transitions. Word has length 12 [2022-11-16 19:56:33,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:33,655 INFO L495 AbstractCegarLoop]: Abstraction has 5775 states and 25477 transitions. [2022-11-16 19:56:33,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:33,655 INFO L276 IsEmpty]: Start isEmpty. Operand 5775 states and 25477 transitions. [2022-11-16 19:56:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:56:33,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:33,657 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:33,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (132)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:33,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-11-16 19:56:34,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (131)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:34,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:34,263 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:34,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:34,263 INFO L85 PathProgramCache]: Analyzing trace with hash 910043558, now seen corresponding path program 2 times [2022-11-16 19:56:34,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808310216] [2022-11-16 19:56:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:56:34,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:34,265 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:34,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Waiting until timeout for monitored process [2022-11-16 19:56:34,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 19:56:34,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:56:34,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:56:34,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:34,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:56:34,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:56:34,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:56:34,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:56:34,734 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:56:34,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:56:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:56:34,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:56:34,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:34,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808310216] [2022-11-16 19:56:34,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808310216] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:56:34,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:56:34,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:56:34,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134714582] [2022-11-16 19:56:34,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:56:34,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:56:34,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:34,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:56:34,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:56:34,851 INFO L87 Difference]: Start difference. First operand 5775 states and 25477 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:35,871 INFO L93 Difference]: Finished difference Result 7092 states and 29920 transitions. [2022-11-16 19:56:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:56:35,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:56:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:35,894 INFO L225 Difference]: With dead ends: 7092 [2022-11-16 19:56:35,894 INFO L226 Difference]: Without dead ends: 7092 [2022-11-16 19:56:35,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:56:35,894 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:35,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:56:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2022-11-16 19:56:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 5019. [2022-11-16 19:56:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5019 states, 4913 states have (on average 4.380622837370242) internal successors, (21522), 5018 states have internal predecessors, (21522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5019 states to 5019 states and 21522 transitions. [2022-11-16 19:56:36,026 INFO L78 Accepts]: Start accepts. Automaton has 5019 states and 21522 transitions. Word has length 13 [2022-11-16 19:56:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:36,026 INFO L495 AbstractCegarLoop]: Abstraction has 5019 states and 21522 transitions. [2022-11-16 19:56:36,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5019 states and 21522 transitions. [2022-11-16 19:56:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:56:36,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:36,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:36,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (134)] Ended with exit code 0 [2022-11-16 19:56:36,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:36,228 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash 776765548, now seen corresponding path program 1 times [2022-11-16 19:56:36,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:36,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973771757] [2022-11-16 19:56:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:36,229 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:36,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-16 19:56:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:36,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:56:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:36,848 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-16 19:56:36,848 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 33 treesize of output 44 [2022-11-16 19:56:36,910 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:56:36,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 19:56:36,962 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 19:56:36,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 19:56:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:37,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:56:37,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:37,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973771757] [2022-11-16 19:56:37,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973771757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:56:37,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:56:37,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:56:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840760644] [2022-11-16 19:56:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:56:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:56:37,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:37,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:56:37,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:56:37,110 INFO L87 Difference]: Start difference. First operand 5019 states and 21522 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:37,559 INFO L93 Difference]: Finished difference Result 4776 states and 20610 transitions. [2022-11-16 19:56:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:56:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:56:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:37,576 INFO L225 Difference]: With dead ends: 4776 [2022-11-16 19:56:37,577 INFO L226 Difference]: Without dead ends: 4776 [2022-11-16 19:56:37,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:56:37,577 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:37,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-16 19:56:37,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2022-11-16 19:56:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4700. [2022-11-16 19:56:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4700 states, 4622 states have (on average 4.419299004759845) internal successors, (20426), 4699 states have internal predecessors, (20426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4700 states to 4700 states and 20426 transitions. [2022-11-16 19:56:37,693 INFO L78 Accepts]: Start accepts. Automaton has 4700 states and 20426 transitions. Word has length 13 [2022-11-16 19:56:37,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:37,693 INFO L495 AbstractCegarLoop]: Abstraction has 4700 states and 20426 transitions. [2022-11-16 19:56:37,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:37,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4700 states and 20426 transitions. [2022-11-16 19:56:37,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:56:37,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:37,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:37,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-16 19:56:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:37,895 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1529789918, now seen corresponding path program 1 times [2022-11-16 19:56:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:37,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629039964] [2022-11-16 19:56:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:37,895 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:37,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:37,896 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:37,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Waiting until timeout for monitored process [2022-11-16 19:56:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:38,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:56:38,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:38,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:56:38,356 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629039964] [2022-11-16 19:56:38,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629039964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:56:38,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:56:38,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 19:56:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995832645] [2022-11-16 19:56:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:56:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:56:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:56:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:56:38,357 INFO L87 Difference]: Start difference. First operand 4700 states and 20426 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:39,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:39,459 INFO L93 Difference]: Finished difference Result 6428 states and 27055 transitions. [2022-11-16 19:56:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:56:39,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:56:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:39,525 INFO L225 Difference]: With dead ends: 6428 [2022-11-16 19:56:39,525 INFO L226 Difference]: Without dead ends: 6428 [2022-11-16 19:56:39,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:56:39,525 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 165 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 3 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 19:56:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6428 states. [2022-11-16 19:56:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6428 to 4974. [2022-11-16 19:56:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4974 states, 4896 states have (on average 4.405841503267974) internal successors, (21571), 4973 states have internal predecessors, (21571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:39,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4974 states to 4974 states and 21571 transitions. [2022-11-16 19:56:39,639 INFO L78 Accepts]: Start accepts. Automaton has 4974 states and 21571 transitions. Word has length 13 [2022-11-16 19:56:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:39,640 INFO L495 AbstractCegarLoop]: Abstraction has 4974 states and 21571 transitions. [2022-11-16 19:56:39,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4974 states and 21571 transitions. [2022-11-16 19:56:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:56:39,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:39,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:56:39,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (136)] Ended with exit code 0 [2022-11-16 19:56:39,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:39,841 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1529792855, now seen corresponding path program 1 times [2022-11-16 19:56:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:39,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763315475] [2022-11-16 19:56:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:39,844 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:39,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-16 19:56:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:40,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:56:40,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:40,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:56:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:40,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:41,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:56:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763315475] [2022-11-16 19:56:41,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763315475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:41,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719042703] [2022-11-16 19:56:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:41,311 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:56:41,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:56:41,312 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:56:41,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (138)] Waiting until timeout for monitored process [2022-11-16 19:56:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:41,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:56:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:56:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:56:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719042703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:42,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383515035] [2022-11-16 19:56:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:56:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:56:42,777 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:56:42,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-11-16 19:56:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:43,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:56:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:43,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:56:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:43,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:56:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:56:43,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383515035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:56:43,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:56:43,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 22 [2022-11-16 19:56:43,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067025405] [2022-11-16 19:56:43,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:56:43,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:56:43,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:56:43,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:56:43,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:56:43,552 INFO L87 Difference]: Start difference. First operand 4974 states and 21571 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:56,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:56:56,231 INFO L93 Difference]: Finished difference Result 13861 states and 57664 transitions. [2022-11-16 19:56:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:56:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:56:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:56:56,298 INFO L225 Difference]: With dead ends: 13861 [2022-11-16 19:56:56,298 INFO L226 Difference]: Without dead ends: 13861 [2022-11-16 19:56:56,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=400, Invalid=1322, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 19:56:56,299 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 990 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:56:56,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 0 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-16 19:56:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13861 states. [2022-11-16 19:56:56,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13861 to 6828. [2022-11-16 19:56:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6828 states, 6750 states have (on average 4.775703703703703) internal successors, (32236), 6827 states have internal predecessors, (32236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:56,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6828 states to 6828 states and 32236 transitions. [2022-11-16 19:56:56,549 INFO L78 Accepts]: Start accepts. Automaton has 6828 states and 32236 transitions. Word has length 13 [2022-11-16 19:56:56,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:56:56,549 INFO L495 AbstractCegarLoop]: Abstraction has 6828 states and 32236 transitions. [2022-11-16 19:56:56,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:56:56,550 INFO L276 IsEmpty]: Start isEmpty. Operand 6828 states and 32236 transitions. [2022-11-16 19:56:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:56:56,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:56:56,551 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2022-11-16 19:56:56,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:56,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:56,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (138)] Forceful destruction successful, exit code 0 [2022-11-16 19:56:57,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:56:57,151 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:56:57,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:56:57,152 INFO L85 PathProgramCache]: Analyzing trace with hash -614990612, now seen corresponding path program 1 times [2022-11-16 19:56:57,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:56:57,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279686510] [2022-11-16 19:56:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:56:57,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:56:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:56:57,153 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:56:57,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Waiting until timeout for monitored process [2022-11-16 19:56:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:56:57,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:56:57,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:56:57,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:56:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:56:58,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:01,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:57:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279686510] [2022-11-16 19:57:01,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279686510] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:01,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [319205978] [2022-11-16 19:57:01,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:57:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:57:01,712 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:57:01,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (141)] Waiting until timeout for monitored process [2022-11-16 19:57:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:02,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:57:02,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:57:02,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:57:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:03,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:07,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [319205978] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:07,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128781997] [2022-11-16 19:57:07,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:07,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:57:07,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:57:07,416 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:57:07,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-11-16 19:57:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:07,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:57:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:57:07,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:57:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:08,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:08,901 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:08,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128781997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:08,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:57:08,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2022-11-16 19:57:08,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094021375] [2022-11-16 19:57:08,902 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:57:08,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 19:57:08,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:57:08,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 19:57:08,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:57:08,903 INFO L87 Difference]: Start difference. First operand 6828 states and 32236 transitions. Second operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:17,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:19,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:21,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:23,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:25,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:27,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:29,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:32,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:34,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:36,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:38,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:40,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:42,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:44,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:46,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:47,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:49,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:51,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:53,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:55,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:57,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:57:59,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:58:02,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:58:04,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:58:09,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:58:10,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:58:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:58,526 INFO L93 Difference]: Finished difference Result 109002 states and 528400 transitions. [2022-11-16 19:58:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:58:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:58:58,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:59,942 INFO L225 Difference]: With dead ends: 109002 [2022-11-16 19:58:59,943 INFO L226 Difference]: Without dead ends: 109002 [2022-11-16 19:58:59,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=1158, Invalid=2264, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 19:58:59,943 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7309 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6513 mSolverCounterSat, 545 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7309 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 6513 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:59,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7309 Valid, 0 Invalid, 7078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [545 Valid, 6513 Invalid, 20 Unknown, 0 Unchecked, 83.5s Time] [2022-11-16 19:59:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109002 states. [2022-11-16 19:59:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109002 to 6905. [2022-11-16 19:59:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6905 states, 6827 states have (on average 4.744397246228211) internal successors, (32390), 6904 states have internal predecessors, (32390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6905 states to 6905 states and 32390 transitions. [2022-11-16 19:59:02,047 INFO L78 Accepts]: Start accepts. Automaton has 6905 states and 32390 transitions. Word has length 13 [2022-11-16 19:59:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:02,047 INFO L495 AbstractCegarLoop]: Abstraction has 6905 states and 32390 transitions. [2022-11-16 19:59:02,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 6905 states and 32390 transitions. [2022-11-16 19:59:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:59:02,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:02,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:02,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:02,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (141)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:02,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (140)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:02,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:59:02,650 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:59:02,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -655316348, now seen corresponding path program 1 times [2022-11-16 19:59:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:59:02,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844198353] [2022-11-16 19:59:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:02,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:59:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:59:02,652 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:59:02,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Waiting until timeout for monitored process [2022-11-16 19:59:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:03,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:59:03,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:03,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:59:03,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:59:03,617 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:59:03,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:59:03,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:59:03,831 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:59:03,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:59:03,926 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:59:03,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:59:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:04,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:06,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:59:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844198353] [2022-11-16 19:59:06,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844198353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1663149758] [2022-11-16 19:59:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:06,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:59:06,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:59:06,540 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:59:06,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (144)] Waiting until timeout for monitored process [2022-11-16 19:59:07,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:59:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:07,614 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:59:07,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:59:07,814 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:59:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:59:08,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:08,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:59:08,086 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:59:08,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:59:08,161 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:59:08,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:59:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:08,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:12,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1663149758] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182179295] [2022-11-16 19:59:12,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:12,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:12,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:12,802 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:12,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-11-16 19:59:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 19:59:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:13,484 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:59:13,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:59:13,684 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:59:13,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:59:13,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:13,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:59:13,818 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:59:13,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:59:13,891 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:59:13,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:59:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:14,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:15,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182179295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:15,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:59:15,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6, 7, 6, 7] total 18 [2022-11-16 19:59:15,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167253739] [2022-11-16 19:59:15,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:59:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:59:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:59:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2022-11-16 19:59:15,124 INFO L87 Difference]: Start difference. First operand 6905 states and 32390 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:23,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:23,413 INFO L93 Difference]: Finished difference Result 15645 states and 69364 transitions. [2022-11-16 19:59:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:59:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 19:59:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:23,484 INFO L225 Difference]: With dead ends: 15645 [2022-11-16 19:59:23,484 INFO L226 Difference]: Without dead ends: 15645 [2022-11-16 19:59:23,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=209, Invalid=720, Unknown=1, NotChecked=0, Total=930 [2022-11-16 19:59:23,485 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 442 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1481 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:23,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 0 Invalid, 2517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1018 Invalid, 0 Unknown, 1481 Unchecked, 6.5s Time] [2022-11-16 19:59:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15645 states. [2022-11-16 19:59:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15645 to 8308. [2022-11-16 19:59:23,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8308 states, 8230 states have (on average 4.792102065613609) internal successors, (39439), 8307 states have internal predecessors, (39439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8308 states to 8308 states and 39439 transitions. [2022-11-16 19:59:23,873 INFO L78 Accepts]: Start accepts. Automaton has 8308 states and 39439 transitions. Word has length 13 [2022-11-16 19:59:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:23,873 INFO L495 AbstractCegarLoop]: Abstraction has 8308 states and 39439 transitions. [2022-11-16 19:59:23,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:23,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8308 states and 39439 transitions. [2022-11-16 19:59:23,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 19:59:23,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:23,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:23,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (143)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:24,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (144)] Ended with exit code 0 [2022-11-16 19:59:24,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:24,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:24,476 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2022-11-16 19:59:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1997510061, now seen corresponding path program 2 times [2022-11-16 19:59:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:59:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29086437] [2022-11-16 19:59:24,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:59:24,477 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:59:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:59:24,478 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:59:24,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (146)] Waiting until timeout for monitored process [2022-11-16 19:59:24,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:59:24,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:59:24,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:59:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:24,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:59:24,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 19:59:25,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:25,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 19:59:25,108 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 19:59:25,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 19:59:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:25,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:28,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:59:28,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29086437] [2022-11-16 19:59:28,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29086437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:28,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2106106] [2022-11-16 19:59:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:59:28,442 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:59:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:59:28,443 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:59:28,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (147)] Waiting until timeout for monitored process [2022-11-16 19:59:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:59:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:59:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 19:59:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:29,805 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-16 19:59:29,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-16 19:59:30,009 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-16 19:59:30,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-16 19:59:30,401 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 19:59:30,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 19:59:30,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 19:59:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:31,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2022-11-16 19:59:31,115 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 19:59:31,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 19:59:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:32,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:36,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2106106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:36,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243548654] [2022-11-16 19:59:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:59:36,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:36,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:36,998 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:37,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8dcbf800-e39c-4b61-830e-0fb6f88b3877/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-11-16 19:59:37,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:59:37,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:59:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 19:59:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:37,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 19:59:38,462 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 19:59:38,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-16 19:59:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:59:39,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:53,111 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:59:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:59:58,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243548654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:58,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:59:58,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10, 8, 9, 8] total 44 [2022-11-16 19:59:58,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706152427] [2022-11-16 19:59:58,145 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 19:59:58,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:59:58,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 19:59:58,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1713, Unknown=3, NotChecked=0, Total=1980 [2022-11-16 19:59:58,146 INFO L87 Difference]: Start difference. First operand 8308 states and 39439 transitions. Second operand has 45 states, 44 states have (on average 1.5) internal successors, (66), 45 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:52,678 WARN L233 SmtUtils]: Spent 43.28s on a formula simplification. DAG size of input: 96 DAG size of output: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:18,192 WARN L233 SmtUtils]: Spent 17.53s on a formula simplification that was a NOOP. DAG size: 91 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:02:02,555 WARN L233 SmtUtils]: Spent 38.97s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)