./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS --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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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-8393723 [2022-11-19 07:54:06,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:54:06,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:54:06,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:54:06,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:54:06,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:54:06,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:54:06,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:54:06,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:54:06,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:54:06,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:54:06,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:54:06,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:54:06,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:54:06,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:54:06,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:54:06,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:54:06,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:54:06,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:54:06,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:54:06,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:54:06,180 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:54:06,181 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:54:06,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:54:06,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:54:06,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:54:06,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:54:06,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:54:06,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:54:06,190 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:54:06,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:54:06,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:54:06,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:54:06,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:54:06,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:54:06,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:54:06,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:54:06,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:54:06,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:54:06,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:54:06,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:54:06,200 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:54:06,224 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:54:06,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:54:06,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:54:06,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:54:06,226 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:54:06,227 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:54:06,227 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:54:06,227 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:54:06,227 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:54:06,228 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:54:06,228 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:54:06,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:54:06,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:54:06,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:54:06,229 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:54:06,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:54:06,230 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:54:06,230 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:54:06,231 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:54:06,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:54:06,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:54:06,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:54:06,232 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:54:06,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:54:06,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:54:06,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:54:06,233 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:54:06,233 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:54:06,233 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:54:06,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:54:06,234 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:54:06,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:54:06,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:54:06,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:54:06,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:54:06,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:06,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:54:06,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:54:06,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:54:06,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:54:06,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:54:06,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:54:06,237 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-11-19 07:54:06,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:54:06,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:54:06,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:54:06,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:54:06,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:54:06,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-19 07:54:06,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/a75dab1ed/5cda4195e92c47fa85cb35f514c9c358/FLAGa8ade6774 [2022-11-19 07:54:07,245 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:54:07,250 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-19 07:54:07,270 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/a75dab1ed/5cda4195e92c47fa85cb35f514c9c358/FLAGa8ade6774 [2022-11-19 07:54:07,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/a75dab1ed/5cda4195e92c47fa85cb35f514c9c358 [2022-11-19 07:54:07,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:54:07,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:54:07,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:07,599 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:54:07,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:54:07,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:07" (1/1) ... [2022-11-19 07:54:07,606 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389cdb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:07, skipping insertion in model container [2022-11-19 07:54:07,606 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:07" (1/1) ... [2022-11-19 07:54:07,615 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:54:07,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:54:07,958 WARN L234 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-19 07:54:07,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:08,000 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) [2022-11-19 07:54:08,001 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@396a0d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:08, skipping insertion in model container [2022-11-19 07:54:08,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:08,002 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:54:08,005 INFO L158 Benchmark]: Toolchain (without parser) took 409.31ms. Allocated memory is still 92.3MB. Free memory was 60.0MB in the beginning and 69.8MB in the end (delta: -9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:54:08,006 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 48.1MB in the beginning and 48.1MB in the end (delta: 46.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:54:08,008 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.01ms. Allocated memory is still 92.3MB. Free memory was 59.8MB in the beginning and 69.8MB in the end (delta: -10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:54:08,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 92.3MB. Free memory was 48.1MB in the beginning and 48.1MB in the end (delta: 46.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 403.01ms. Allocated memory is still 92.3MB. Free memory was 59.8MB in the beginning and 69.8MB in the end (delta: -10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS --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 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 --- 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-8393723 [2022-11-19 07:54:10,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:54:10,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:54:10,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:54:10,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:54:10,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:54:10,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:54:10,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:54:10,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:54:10,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:54:10,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:54:10,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:54:10,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:54:10,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:54:10,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:54:10,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:54:10,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:54:10,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:54:10,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:54:10,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:54:10,236 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:54:10,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:54:10,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:54:10,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:54:10,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:54:10,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:54:10,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:54:10,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:54:10,246 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:54:10,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:54:10,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:54:10,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:54:10,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:54:10,250 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:54:10,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:54:10,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:54:10,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:54:10,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:54:10,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:54:10,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:54:10,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:54:10,255 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:54:10,301 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:54:10,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:54:10,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:54:10,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:54:10,302 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:54:10,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:54:10,303 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:54:10,303 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:54:10,303 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:54:10,304 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:54:10,304 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:54:10,304 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:54:10,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:54:10,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:54:10,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:54:10,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:54:10,306 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:54:10,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:54:10,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:54:10,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:54:10,307 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:54:10,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:54:10,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:54:10,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:54:10,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:54:10,315 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:54:10,316 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:54:10,316 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:54:10,317 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:54:10,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:54:10,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:54:10,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:54:10,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:10,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:54:10,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:54:10,318 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:54:10,319 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:54:10,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:54:10,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:54:10,320 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6990ac65798f2c5a95ce01b01bd39640075d7bea37e69dff3da0d3d7c4b56ab2 [2022-11-19 07:54:10,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:54:10,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:54:10,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:54:10,743 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:54:10,744 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:54:10,745 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-19 07:54:10,828 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/1c045d89a/d116017f4e544e5cb9db5d5da71fc159/FLAG5b7810014 [2022-11-19 07:54:11,421 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:54:11,424 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2022-11-19 07:54:11,433 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/1c045d89a/d116017f4e544e5cb9db5d5da71fc159/FLAG5b7810014 [2022-11-19 07:54:11,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/data/1c045d89a/d116017f4e544e5cb9db5d5da71fc159 [2022-11-19 07:54:11,767 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:54:11,768 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:54:11,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:11,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:54:11,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:54:11,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:11" (1/1) ... [2022-11-19 07:54:11,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd5e520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:11, skipping insertion in model container [2022-11-19 07:54:11,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:11" (1/1) ... [2022-11-19 07:54:11,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:54:11,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:54:12,008 WARN L234 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-19 07:54:12,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:12,072 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:54:12,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:54:12,116 WARN L234 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-19 07:54:12,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:12,134 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:54:12,175 WARN L234 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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c[3412,3425] [2022-11-19 07:54:12,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:54:12,204 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:54:12,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12 WrapperNode [2022-11-19 07:54:12,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:54:12,206 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:12,206 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:54:12,206 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:54:12,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,224 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,254 INFO L138 Inliner]: procedures = 27, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 238 [2022-11-19 07:54:12,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:54:12,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:54:12,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:54:12,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:54:12,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,290 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:54:12,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:54:12,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:54:12,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:54:12,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (1/1) ... [2022-11-19 07:54:12,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:54:12,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:54:12,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:54:12,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:54:12,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:54:12,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:54:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:54:12,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:54:12,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:54:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:54:12,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:54:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:54:12,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:54:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:54:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:54:12,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:54:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:54:12,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:54:12,426 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:54:12,552 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:54:12,554 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:54:13,369 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:54:13,628 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:54:13,628 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 07:54:13,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:13 BoogieIcfgContainer [2022-11-19 07:54:13,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:54:13,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:54:13,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:54:13,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:54:13,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:11" (1/3) ... [2022-11-19 07:54:13,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ecda31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:13, skipping insertion in model container [2022-11-19 07:54:13,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:12" (2/3) ... [2022-11-19 07:54:13,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32ecda31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:13, skipping insertion in model container [2022-11-19 07:54:13,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:13" (3/3) ... [2022-11-19 07:54:13,658 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2022-11-19 07:54:13,681 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:54:13,681 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-19 07:54:13,681 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:54:13,817 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-19 07:54:13,867 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:54:13,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 234 transitions, 492 flow [2022-11-19 07:54:13,889 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 234 transitions, 492 flow [2022-11-19 07:54:13,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 492 flow [2022-11-19 07:54:14,033 INFO L130 PetriNetUnfolder]: 18/231 cut-off events. [2022-11-19 07:54:14,033 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-19 07:54:14,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 231 events. 18/231 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 230 event pairs, 0 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 182. Up to 3 conditions per place. [2022-11-19 07:54:14,047 INFO L119 LiptonReduction]: Number of co-enabled transitions 2700 [2022-11-19 07:55:01,136 INFO L134 LiptonReduction]: Checked pairs total: 4557 [2022-11-19 07:55:01,136 INFO L136 LiptonReduction]: Total number of compositions: 252 [2022-11-19 07:55:01,144 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2022-11-19 07:55:01,261 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:01,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:55:01,289 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3b6a74b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:55:01,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-19 07:55:01,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:55:01,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:01,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:55:01,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash 34610, now seen corresponding path program 1 times [2022-11-19 07:55:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:01,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1407044559] [2022-11-19 07:55:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:01,341 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 [2022-11-19 07:55:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:01,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:01,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:55:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:01,699 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:55:01,700 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 [2022-11-19 07:55:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:01,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:01,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:01,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1407044559] [2022-11-19 07:55:01,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1407044559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:01,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:01,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394761654] [2022-11-19 07:55:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:01,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:01,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:01,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:01,794 INFO L87 Difference]: Start difference. First operand has 1565 states, 1237 states have (on average 4.568310428455942) internal successors, (5651), 1564 states have internal predecessors, (5651), 0 states have call successors, (0), 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) [2022-11-19 07:55:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:02,149 INFO L93 Difference]: Finished difference Result 1562 states and 5460 transitions. [2022-11-19 07:55:02,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:02,151 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 [2022-11-19 07:55:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:02,195 INFO L225 Difference]: With dead ends: 1562 [2022-11-19 07:55:02,195 INFO L226 Difference]: Without dead ends: 1562 [2022-11-19 07:55:02,197 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 [2022-11-19 07:55:02,203 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:02,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:55:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2022-11-19 07:55:02,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1562. [2022-11-19 07:55:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1237 states have (on average 4.413904607922393) internal successors, (5460), 1561 states have internal predecessors, (5460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5460 transitions. [2022-11-19 07:55:02,387 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5460 transitions. Word has length 2 [2022-11-19 07:55:02,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:02,387 INFO L495 AbstractCegarLoop]: Abstraction has 1562 states and 5460 transitions. [2022-11-19 07:55:02,387 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) [2022-11-19 07:55:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5460 transitions. [2022-11-19 07:55:02,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:55:02,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:02,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:55:02,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:02,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:02,600 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:02,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 34611, now seen corresponding path program 1 times [2022-11-19 07:55:02,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:02,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606513880] [2022-11-19 07:55:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:02,602 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 [2022-11-19 07:55:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:02,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:02,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:02,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:55:02,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:02,872 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:02,872 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 [2022-11-19 07:55:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:02,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:02,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:02,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606513880] [2022-11-19 07:55:02,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606513880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:02,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:02,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:02,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905008099] [2022-11-19 07:55:02,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:02,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:02,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:02,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:02,911 INFO L87 Difference]: Start difference. First operand 1562 states and 5460 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) [2022-11-19 07:55:03,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:03,601 INFO L93 Difference]: Finished difference Result 3121 states and 10917 transitions. [2022-11-19 07:55:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:03,602 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 [2022-11-19 07:55:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:03,627 INFO L225 Difference]: With dead ends: 3121 [2022-11-19 07:55:03,627 INFO L226 Difference]: Without dead ends: 3121 [2022-11-19 07:55:03,628 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 [2022-11-19 07:55:03,629 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:03,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:55:03,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-11-19 07:55:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 1564. [2022-11-19 07:55:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1239 states have (on average 4.411622276029056) internal successors, (5466), 1563 states have internal predecessors, (5466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5466 transitions. [2022-11-19 07:55:03,734 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5466 transitions. Word has length 2 [2022-11-19 07:55:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:03,734 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 5466 transitions. [2022-11-19 07:55:03,734 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) [2022-11-19 07:55:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5466 transitions. [2022-11-19 07:55:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:55:03,735 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:03,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:55:03,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:03,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:03,946 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:03,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1079076, now seen corresponding path program 1 times [2022-11-19 07:55:03,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540230096] [2022-11-19 07:55:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:03,948 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 [2022-11-19 07:55:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:03,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:03,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:04,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:55:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:04,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:04,223 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:55:04,224 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 [2022-11-19 07:55:04,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:04,689 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:04,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 07:55:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:04,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:04,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:04,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540230096] [2022-11-19 07:55:04,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540230096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:04,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:04,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:04,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778222403] [2022-11-19 07:55:04,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:04,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:04,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:04,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:04,780 INFO L87 Difference]: Start difference. First operand 1564 states and 5466 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:05,097 INFO L93 Difference]: Finished difference Result 1565 states and 5469 transitions. [2022-11-19 07:55:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:55:05,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:55:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:05,125 INFO L225 Difference]: With dead ends: 1565 [2022-11-19 07:55:05,125 INFO L226 Difference]: Without dead ends: 1565 [2022-11-19 07:55:05,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:05,134 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:05,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-11-19 07:55:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-19 07:55:05,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1565. [2022-11-19 07:55:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1240 states have (on average 4.410483870967742) internal successors, (5469), 1564 states have internal predecessors, (5469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 5469 transitions. [2022-11-19 07:55:05,314 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 5469 transitions. Word has length 3 [2022-11-19 07:55:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:05,314 INFO L495 AbstractCegarLoop]: Abstraction has 1565 states and 5469 transitions. [2022-11-19 07:55:05,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 5469 transitions. [2022-11-19 07:55:05,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:55:05,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:05,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:55:05,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:05,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:05,525 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1079077, now seen corresponding path program 1 times [2022-11-19 07:55:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:05,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101074634] [2022-11-19 07:55:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:05,526 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 [2022-11-19 07:55:05,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:05,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:05,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:55:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:05,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:55:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:05,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:05,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:05,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:05,764 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-19 07:55:05,765 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 [2022-11-19 07:55:05,797 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:55:05,797 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 [2022-11-19 07:55:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:05,864 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 [2022-11-19 07:55:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:05,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:05,945 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:05,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101074634] [2022-11-19 07:55:05,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101074634] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:05,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:05,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759113989] [2022-11-19 07:55:05,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:05,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:05,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:05,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:05,947 INFO L87 Difference]: Start difference. First operand 1565 states and 5469 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:06,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:06,341 INFO L93 Difference]: Finished difference Result 1284 states and 4346 transitions. [2022-11-19 07:55:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:55:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:06,352 INFO L225 Difference]: With dead ends: 1284 [2022-11-19 07:55:06,352 INFO L226 Difference]: Without dead ends: 1284 [2022-11-19 07:55:06,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:06,354 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:06,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 3 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-19 07:55:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-11-19 07:55:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1284. [2022-11-19 07:55:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1035 states have (on average 4.19903381642512) internal successors, (4346), 1283 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:06,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4346 transitions. [2022-11-19 07:55:06,432 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4346 transitions. Word has length 3 [2022-11-19 07:55:06,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:06,432 INFO L495 AbstractCegarLoop]: Abstraction has 1284 states and 4346 transitions. [2022-11-19 07:55:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:06,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4346 transitions. [2022-11-19 07:55:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:55:06,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:06,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:55:06,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:06,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:06,646 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:06,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1077420, now seen corresponding path program 1 times [2022-11-19 07:55:06,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:06,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1087973235] [2022-11-19 07:55:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:06,648 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 [2022-11-19 07:55:06,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:06,649 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:06,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:55:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:06,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:55:06,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:06,881 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:06,882 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 [2022-11-19 07:55:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:06,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:07,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:07,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1087973235] [2022-11-19 07:55:07,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1087973235] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:07,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [891205677] [2022-11-19 07:55:07,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:07,259 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:55:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:55:07,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:55:07,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:55:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:55:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:07,581 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:07,581 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 [2022-11-19 07:55:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:07,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:07,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [891205677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:07,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211494960] [2022-11-19 07:55:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:07,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:07,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:07,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:55:07,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:07,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:55:07,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:07,943 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:07,943 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:55:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211494960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:08,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:55:08,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:55:08,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161950856] [2022-11-19 07:55:08,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:08,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:55:08,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:55:08,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:55:08,189 INFO L87 Difference]: Start difference. First operand 1284 states and 4346 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) [2022-11-19 07:55:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:10,989 INFO L93 Difference]: Finished difference Result 5118 states and 17354 transitions. [2022-11-19 07:55:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:55:10,991 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 [2022-11-19 07:55:10,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:11,027 INFO L225 Difference]: With dead ends: 5118 [2022-11-19 07:55:11,028 INFO L226 Difference]: Without dead ends: 5118 [2022-11-19 07:55:11,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:55:11,029 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 514 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:11,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 15 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:55:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2022-11-19 07:55:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 1290. [2022-11-19 07:55:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1041 states have (on average 4.189241114313161) internal successors, (4361), 1289 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 4361 transitions. [2022-11-19 07:55:11,138 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 4361 transitions. Word has length 3 [2022-11-19 07:55:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:11,138 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 4361 transitions. [2022-11-19 07:55:11,138 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) [2022-11-19 07:55:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 4361 transitions. [2022-11-19 07:55:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:55:11,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:11,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:55:11,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:11,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:11,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:11,743 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:11,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:11,743 INFO L85 PathProgramCache]: Analyzing trace with hash 33451632, now seen corresponding path program 1 times [2022-11-19 07:55:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:11,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450411926] [2022-11-19 07:55:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:11,744 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 [2022-11-19 07:55:11,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:11,745 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:11,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:11,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:55:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:12,003 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:55:12,004 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 [2022-11-19 07:55:12,123 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:12,123 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 [2022-11-19 07:55:12,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:55:12,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:12,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:12,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450411926] [2022-11-19 07:55:12,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450411926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:12,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:12,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:12,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347771731] [2022-11-19 07:55:12,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:12,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:12,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:12,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:12,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:12,152 INFO L87 Difference]: Start difference. First operand 1290 states and 4361 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:12,363 INFO L93 Difference]: Finished difference Result 1294 states and 4370 transitions. [2022-11-19 07:55:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:12,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:55:12,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:12,372 INFO L225 Difference]: With dead ends: 1294 [2022-11-19 07:55:12,373 INFO L226 Difference]: Without dead ends: 1294 [2022-11-19 07:55:12,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:12,374 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:12,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-19 07:55:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-19 07:55:12,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2022-11-19 07:55:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1045 states have (on average 4.181818181818182) internal successors, (4370), 1293 states have internal predecessors, (4370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:12,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4370 transitions. [2022-11-19 07:55:12,435 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4370 transitions. Word has length 4 [2022-11-19 07:55:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:12,435 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 4370 transitions. [2022-11-19 07:55:12,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4370 transitions. [2022-11-19 07:55:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:55:12,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:12,436 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:55:12,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:12,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:12,649 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:12,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:12,649 INFO L85 PathProgramCache]: Analyzing trace with hash 33406155, now seen corresponding path program 1 times [2022-11-19 07:55:12,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:12,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1306033914] [2022-11-19 07:55:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:12,650 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 [2022-11-19 07:55:12,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:12,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:12,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:55:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:12,924 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:55:12,924 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 [2022-11-19 07:55:13,342 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-19 07:55:13,342 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 32 [2022-11-19 07:55:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:55:13,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:13,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1306033914] [2022-11-19 07:55:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1306033914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:13,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722383514] [2022-11-19 07:55:13,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:13,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:13,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:13,417 INFO L87 Difference]: Start difference. First operand 1294 states and 4370 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:13,616 INFO L93 Difference]: Finished difference Result 1294 states and 4369 transitions. [2022-11-19 07:55:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:55:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:13,629 INFO L225 Difference]: With dead ends: 1294 [2022-11-19 07:55:13,636 INFO L226 Difference]: Without dead ends: 1294 [2022-11-19 07:55:13,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:13,637 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:13,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-19 07:55:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-19 07:55:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2022-11-19 07:55:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1045 states have (on average 4.180861244019138) internal successors, (4369), 1293 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4369 transitions. [2022-11-19 07:55:13,675 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4369 transitions. Word has length 4 [2022-11-19 07:55:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:13,675 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 4369 transitions. [2022-11-19 07:55:13,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4369 transitions. [2022-11-19 07:55:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:55:13,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:13,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:55:13,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:13,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:13,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:13,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1037016875, now seen corresponding path program 1 times [2022-11-19 07:55:13,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:13,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310758458] [2022-11-19 07:55:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:13,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:13,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:13,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:55:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:14,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:14,101 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:55:14,101 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 [2022-11-19 07:55:14,262 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:14,262 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 [2022-11-19 07:55:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:14,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:14,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310758458] [2022-11-19 07:55:14,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310758458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:14,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:14,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591929971] [2022-11-19 07:55:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:14,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:14,321 INFO L87 Difference]: Start difference. First operand 1294 states and 4369 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:14,509 INFO L93 Difference]: Finished difference Result 1297 states and 4381 transitions. [2022-11-19 07:55:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:14,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:55:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:14,516 INFO L225 Difference]: With dead ends: 1297 [2022-11-19 07:55:14,516 INFO L226 Difference]: Without dead ends: 1297 [2022-11-19 07:55:14,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:14,517 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:14,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-19 07:55:14,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-11-19 07:55:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1297. [2022-11-19 07:55:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1048 states have (on average 4.180343511450381) internal successors, (4381), 1296 states have internal predecessors, (4381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4381 transitions. [2022-11-19 07:55:14,557 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4381 transitions. Word has length 5 [2022-11-19 07:55:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:14,557 INFO L495 AbstractCegarLoop]: Abstraction has 1297 states and 4381 transitions. [2022-11-19 07:55:14,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4381 transitions. [2022-11-19 07:55:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:55:14,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:14,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:55:14,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:14,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:14,771 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1037016877, now seen corresponding path program 1 times [2022-11-19 07:55:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141478176] [2022-11-19 07:55:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:14,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:14,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:14,774 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:14,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:55:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:55:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:15,008 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:55:15,009 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 [2022-11-19 07:55:15,023 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 [2022-11-19 07:55:15,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:15,079 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 [2022-11-19 07:55:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:15,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:15,174 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:15,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141478176] [2022-11-19 07:55:15,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141478176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:15,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:15,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:15,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960848511] [2022-11-19 07:55:15,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:15,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:15,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:15,177 INFO L87 Difference]: Start difference. First operand 1297 states and 4381 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:15,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:15,447 INFO L93 Difference]: Finished difference Result 1250 states and 4245 transitions. [2022-11-19 07:55:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:15,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:55:15,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:15,453 INFO L225 Difference]: With dead ends: 1250 [2022-11-19 07:55:15,454 INFO L226 Difference]: Without dead ends: 1250 [2022-11-19 07:55:15,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:15,455 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:15,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 07:55:15,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-11-19 07:55:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2022-11-19 07:55:15,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1021 states have (on average 4.157688540646425) internal successors, (4245), 1249 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 4245 transitions. [2022-11-19 07:55:15,492 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 4245 transitions. Word has length 5 [2022-11-19 07:55:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:15,493 INFO L495 AbstractCegarLoop]: Abstraction has 1250 states and 4245 transitions. [2022-11-19 07:55:15,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 4245 transitions. [2022-11-19 07:55:15,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:55:15,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:15,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:55:15,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:15,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:15,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:15,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1035591081, now seen corresponding path program 1 times [2022-11-19 07:55:15,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:15,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611788991] [2022-11-19 07:55:15,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:15,707 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 [2022-11-19 07:55:15,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:15,708 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:15,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:55:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:15,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:55:15,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:15,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:15,961 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-19 07:55:15,962 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 [2022-11-19 07:55:16,398 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-19 07:55:16,398 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 32 [2022-11-19 07:55:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:55:16,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:16,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:16,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611788991] [2022-11-19 07:55:16,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611788991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:16,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:16,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881377608] [2022-11-19 07:55:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:16,532 INFO L87 Difference]: Start difference. First operand 1250 states and 4245 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:16,720 INFO L93 Difference]: Finished difference Result 1249 states and 4241 transitions. [2022-11-19 07:55:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:55:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:16,726 INFO L225 Difference]: With dead ends: 1249 [2022-11-19 07:55:16,726 INFO L226 Difference]: Without dead ends: 1249 [2022-11-19 07:55:16,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:16,727 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:16,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-19 07:55:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-11-19 07:55:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 1245. [2022-11-19 07:55:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1017 states have (on average 4.16125860373648) internal successors, (4232), 1244 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4232 transitions. [2022-11-19 07:55:16,762 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4232 transitions. Word has length 5 [2022-11-19 07:55:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:16,763 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 4232 transitions. [2022-11-19 07:55:16,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4232 transitions. [2022-11-19 07:55:16,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:55:16,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:16,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:55:16,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:16,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:16,988 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:16,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2082272119, now seen corresponding path program 1 times [2022-11-19 07:55:16,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:16,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1549967571] [2022-11-19 07:55:16,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:16,989 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 [2022-11-19 07:55:16,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:16,990 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:16,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:17,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:55:17,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:17,211 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:55:17,212 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 [2022-11-19 07:55:17,546 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 07:55:17,546 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 [2022-11-19 07:55:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:55:17,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:17,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:17,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1549967571] [2022-11-19 07:55:17,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1549967571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:17,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:17,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:17,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534167379] [2022-11-19 07:55:17,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:17,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:17,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:17,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:17,694 INFO L87 Difference]: Start difference. First operand 1245 states and 4232 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:55:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:17,854 INFO L93 Difference]: Finished difference Result 1252 states and 4251 transitions. [2022-11-19 07:55:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-19 07:55:17,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:17,859 INFO L225 Difference]: With dead ends: 1252 [2022-11-19 07:55:17,859 INFO L226 Difference]: Without dead ends: 1252 [2022-11-19 07:55:17,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:17,860 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:17,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-19 07:55:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-11-19 07:55:17,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1249. [2022-11-19 07:55:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1021 states have (on average 4.153770812928501) internal successors, (4241), 1248 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:17,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 4241 transitions. [2022-11-19 07:55:17,912 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 4241 transitions. Word has length 6 [2022-11-19 07:55:17,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:17,912 INFO L495 AbstractCegarLoop]: Abstraction has 1249 states and 4241 transitions. [2022-11-19 07:55:17,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:55:17,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 4241 transitions. [2022-11-19 07:55:17,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:55:17,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:17,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:55:17,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:18,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:18,126 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:18,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:18,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2082745435, now seen corresponding path program 1 times [2022-11-19 07:55:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:18,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158152647] [2022-11-19 07:55:18,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:18,127 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 [2022-11-19 07:55:18,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:18,128 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:18,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:18,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:55:18,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:18,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:18,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158152647] [2022-11-19 07:55:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158152647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:18,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:18,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:18,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7526502] [2022-11-19 07:55:18,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:18,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:18,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:18,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:18,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:18,272 INFO L87 Difference]: Start difference. First operand 1249 states and 4241 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) [2022-11-19 07:55:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:18,771 INFO L93 Difference]: Finished difference Result 1328 states and 4430 transitions. [2022-11-19 07:55:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:55:18,771 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 [2022-11-19 07:55:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:18,778 INFO L225 Difference]: With dead ends: 1328 [2022-11-19 07:55:18,778 INFO L226 Difference]: Without dead ends: 1324 [2022-11-19 07:55:18,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:18,779 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:18,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:55:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-11-19 07:55:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1323. [2022-11-19 07:55:18,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1088 states have (on average 4.060661764705882) internal successors, (4418), 1322 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4418 transitions. [2022-11-19 07:55:18,819 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4418 transitions. Word has length 6 [2022-11-19 07:55:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:18,819 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 4418 transitions. [2022-11-19 07:55:18,820 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) [2022-11-19 07:55:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4418 transitions. [2022-11-19 07:55:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:55:18,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:18,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:55:18,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:19,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:19,033 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 2038568722, now seen corresponding path program 1 times [2022-11-19 07:55:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:19,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20684644] [2022-11-19 07:55:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:19,034 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 [2022-11-19 07:55:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:19,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:19,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:55:19,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:19,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:19,252 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:55:19,252 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 [2022-11-19 07:55:19,599 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 07:55:19,600 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 [2022-11-19 07:55:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:55:19,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:19,713 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20684644] [2022-11-19 07:55:19,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20684644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:19,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:19,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:19,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976574088] [2022-11-19 07:55:19,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:19,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:19,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,716 INFO L87 Difference]: Start difference. First operand 1323 states and 4418 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:55:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:19,874 INFO L93 Difference]: Finished difference Result 1329 states and 4432 transitions. [2022-11-19 07:55:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-19 07:55:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:19,881 INFO L225 Difference]: With dead ends: 1329 [2022-11-19 07:55:19,882 INFO L226 Difference]: Without dead ends: 1329 [2022-11-19 07:55:19,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:19,883 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:19,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-19 07:55:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2022-11-19 07:55:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1326. [2022-11-19 07:55:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1326 states, 1091 states have (on average 4.058661778185151) internal successors, (4428), 1325 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 4428 transitions. [2022-11-19 07:55:19,924 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 4428 transitions. Word has length 6 [2022-11-19 07:55:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:19,924 INFO L495 AbstractCegarLoop]: Abstraction has 1326 states and 4428 transitions. [2022-11-19 07:55:19,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-19 07:55:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 4428 transitions. [2022-11-19 07:55:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:55:19,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:19,926 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:55:19,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:20,139 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2037095795, now seen corresponding path program 2 times [2022-11-19 07:55:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:20,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14518550] [2022-11-19 07:55:20,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:55:20,140 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 [2022-11-19 07:55:20,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:20,141 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:20,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:20,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:55:20,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:55:20,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:55:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:20,388 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:20,388 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 [2022-11-19 07:55:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:20,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:21,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:21,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14518550] [2022-11-19 07:55:21,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14518550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025992745] [2022-11-19 07:55:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:55:21,241 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:55:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:55:21,242 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:55:21,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 07:55:21,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:55:21,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:55:21,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:55:21,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:21,594 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:21,595 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 [2022-11-19 07:55:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:21,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:22,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025992745] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:22,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333352912] [2022-11-19 07:55:22,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:55:22,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:55:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:55:22,637 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:55:22,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:55:22,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:55:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:55:22,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:55:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:22,911 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:22,911 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 [2022-11-19 07:55:23,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:23,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:23,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333352912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:23,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:55:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:55:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788159073] [2022-11-19 07:55:23,185 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:55:23,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:55:23,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:23,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:55:23,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:55:23,186 INFO L87 Difference]: Start difference. First operand 1326 states and 4428 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) [2022-11-19 07:55:25,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:27,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:28,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:30,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:32,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:34,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:37,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:39,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:41,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:55:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:48,226 INFO L93 Difference]: Finished difference Result 13087 states and 43917 transitions. [2022-11-19 07:55:48,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:55:48,227 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 [2022-11-19 07:55:48,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:48,298 INFO L225 Difference]: With dead ends: 13087 [2022-11-19 07:55:48,299 INFO L226 Difference]: Without dead ends: 13087 [2022-11-19 07:55:48,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:55:48,300 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1400 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 97 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:48,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 102 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1369 Invalid, 3 Unknown, 0 Unchecked, 22.6s Time] [2022-11-19 07:55:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13087 states. [2022-11-19 07:55:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13087 to 1344. [2022-11-19 07:55:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1109 states have (on average 4.027051397655545) internal successors, (4466), 1343 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 4466 transitions. [2022-11-19 07:55:48,532 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 4466 transitions. Word has length 6 [2022-11-19 07:55:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:48,532 INFO L495 AbstractCegarLoop]: Abstraction has 1344 states and 4466 transitions. [2022-11-19 07:55:48,532 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) [2022-11-19 07:55:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 4466 transitions. [2022-11-19 07:55:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:55:48,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:48,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:48,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:48,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:55:48,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-19 07:55:49,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:49,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:49,143 INFO L85 PathProgramCache]: Analyzing trace with hash 140830892, now seen corresponding path program 1 times [2022-11-19 07:55:49,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:49,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285321742] [2022-11-19 07:55:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:49,144 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 [2022-11-19 07:55:49,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:49,145 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:49,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:49,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:55:49,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:49,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:49,391 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:55:49,392 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 [2022-11-19 07:55:49,402 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 [2022-11-19 07:55:49,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:49,453 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 12 treesize of output 14 [2022-11-19 07:55:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:49,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:49,536 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285321742] [2022-11-19 07:55:49,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285321742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:49,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:49,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:49,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342146510] [2022-11-19 07:55:49,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:49,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:49,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:49,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:49,537 INFO L87 Difference]: Start difference. First operand 1344 states and 4466 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) [2022-11-19 07:55:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:49,748 INFO L93 Difference]: Finished difference Result 1359 states and 4528 transitions. [2022-11-19 07:55:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:55:49,749 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 [2022-11-19 07:55:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:49,755 INFO L225 Difference]: With dead ends: 1359 [2022-11-19 07:55:49,755 INFO L226 Difference]: Without dead ends: 1359 [2022-11-19 07:55:49,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:55:49,756 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:49,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-19 07:55:49,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2022-11-19 07:55:49,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1359. [2022-11-19 07:55:49,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1124 states have (on average 4.02846975088968) internal successors, (4528), 1358 states have internal predecessors, (4528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4528 transitions. [2022-11-19 07:55:49,792 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4528 transitions. Word has length 7 [2022-11-19 07:55:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:49,793 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 4528 transitions. [2022-11-19 07:55:49,793 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) [2022-11-19 07:55:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4528 transitions. [2022-11-19 07:55:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:55:49,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:49,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:49,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:50,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:50,007 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:50,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:50,007 INFO L85 PathProgramCache]: Analyzing trace with hash 140830893, now seen corresponding path program 1 times [2022-11-19 07:55:50,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:50,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156371196] [2022-11-19 07:55:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:50,008 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 [2022-11-19 07:55:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:50,009 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:50,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:50,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:55:50,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:50,196 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-19 07:55:50,196 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 [2022-11-19 07:55:50,227 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:50,228 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 [2022-11-19 07:55:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:50,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:50,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:50,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156371196] [2022-11-19 07:55:50,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156371196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:50,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:50,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:50,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948480463] [2022-11-19 07:55:50,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:50,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:50,245 INFO L87 Difference]: Start difference. First operand 1359 states and 4528 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-19 07:55:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:50,480 INFO L93 Difference]: Finished difference Result 1294 states and 4334 transitions. [2022-11-19 07:55:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:50,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-19 07:55:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:50,487 INFO L225 Difference]: With dead ends: 1294 [2022-11-19 07:55:50,488 INFO L226 Difference]: Without dead ends: 1294 [2022-11-19 07:55:50,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:50,489 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:50,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:55:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-19 07:55:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2022-11-19 07:55:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1088 states have (on average 3.983455882352941) internal successors, (4334), 1293 states have internal predecessors, (4334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4334 transitions. [2022-11-19 07:55:50,528 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4334 transitions. Word has length 7 [2022-11-19 07:55:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:50,529 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 4334 transitions. [2022-11-19 07:55:50,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-19 07:55:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4334 transitions. [2022-11-19 07:55:50,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:55:50,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:50,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:50,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:50,743 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1229358992, now seen corresponding path program 1 times [2022-11-19 07:55:50,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:50,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649470059] [2022-11-19 07:55:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:50,744 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 [2022-11-19 07:55:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:50,745 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:50,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:50,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:55:50,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:50,998 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-19 07:55:50,998 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 [2022-11-19 07:55:51,190 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:51,190 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 [2022-11-19 07:55:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:55:51,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:51,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:51,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649470059] [2022-11-19 07:55:51,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649470059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:51,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:51,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:55:51,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696612473] [2022-11-19 07:55:51,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:51,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:55:51,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:51,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:55:51,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:51,244 INFO L87 Difference]: Start difference. First operand 1294 states and 4334 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-19 07:55:51,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:51,406 INFO L93 Difference]: Finished difference Result 1294 states and 4339 transitions. [2022-11-19 07:55:51,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:55:51,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-11-19 07:55:51,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:51,412 INFO L225 Difference]: With dead ends: 1294 [2022-11-19 07:55:51,413 INFO L226 Difference]: Without dead ends: 1294 [2022-11-19 07:55:51,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:55:51,414 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:51,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 07:55:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-11-19 07:55:51,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2022-11-19 07:55:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1088 states have (on average 3.9880514705882355) internal successors, (4339), 1293 states have internal predecessors, (4339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:51,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 4339 transitions. [2022-11-19 07:55:51,449 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 4339 transitions. Word has length 7 [2022-11-19 07:55:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:51,449 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 4339 transitions. [2022-11-19 07:55:51,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-11-19 07:55:51,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 4339 transitions. [2022-11-19 07:55:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:55:51,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:51,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:51,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:55:51,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:51,664 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:51,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1228885676, now seen corresponding path program 1 times [2022-11-19 07:55:51,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615500623] [2022-11-19 07:55:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:51,664 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 [2022-11-19 07:55:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:51,666 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:51,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:55:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:51,884 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:55:51,885 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 [2022-11-19 07:55:51,916 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:55:51,917 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 [2022-11-19 07:55:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:55:51,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:55:51,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:51,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615500623] [2022-11-19 07:55:51,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615500623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:55:51,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:55:51,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:55:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672143496] [2022-11-19 07:55:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:55:51,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:55:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:55:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:55:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:55:51,940 INFO L87 Difference]: Start difference. First operand 1294 states and 4339 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) [2022-11-19 07:55:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:55:52,192 INFO L93 Difference]: Finished difference Result 895 states and 2926 transitions. [2022-11-19 07:55:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:55:52,192 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 [2022-11-19 07:55:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:55:52,195 INFO L225 Difference]: With dead ends: 895 [2022-11-19 07:55:52,195 INFO L226 Difference]: Without dead ends: 895 [2022-11-19 07:55:52,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:55:52,195 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:55:52,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:55:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-19 07:55:52,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2022-11-19 07:55:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 785 states have (on average 3.727388535031847) internal successors, (2926), 894 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:55:52,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2926 transitions. [2022-11-19 07:55:52,216 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2926 transitions. Word has length 7 [2022-11-19 07:55:52,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:55:52,217 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 2926 transitions. [2022-11-19 07:55:52,217 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) [2022-11-19 07:55:52,217 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2926 transitions. [2022-11-19 07:55:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:55:52,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:55:52,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:55:52,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:52,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:55:52,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:55:52,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:55:52,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1228885675, now seen corresponding path program 1 times [2022-11-19 07:55:52,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:55:52,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170711503] [2022-11-19 07:55:52,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:52,432 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 [2022-11-19 07:55:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:55:52,433 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:55:52,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:55:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:55:52,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:52,718 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:52,719 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 [2022-11-19 07:55:52,853 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:55:52,853 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 [2022-11-19 07:55:52,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:52,969 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 [2022-11-19 07:55:52,979 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:55:52,979 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 [2022-11-19 07:55:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:53,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:55:54,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:54,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:55:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170711503] [2022-11-19 07:55:54,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170711503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:55:54,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [540527416] [2022-11-19 07:55:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:55:54,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:55:54,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:55:54,411 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:55:54,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 07:55:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:55:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:55:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:55:54,786 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:55:54,786 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 [2022-11-19 07:55:54,943 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:55:54,943 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:55:55,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:55:55,132 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 [2022-11-19 07:55:55,142 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:55:55,142 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 [2022-11-19 07:55:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:55:55,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:03,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:03,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [540527416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:03,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974439265] [2022-11-19 07:56:03,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:03,802 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:03,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:56:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:56:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:04,094 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:04,094 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 [2022-11-19 07:56:04,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:04,264 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 [2022-11-19 07:56:04,279 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:04,280 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 [2022-11-19 07:56:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:04,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:07,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:56:07,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:56:12,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:12,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974439265] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:12,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:56:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:56:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376993293] [2022-11-19 07:56:12,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:12,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:56:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:56:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=123, Unknown=4, NotChecked=0, Total=182 [2022-11-19 07:56:12,633 INFO L87 Difference]: Start difference. First operand 895 states and 2926 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:12,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:12,985 INFO L93 Difference]: Finished difference Result 911 states and 2961 transitions. [2022-11-19 07:56:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:56:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-19 07:56:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:12,990 INFO L225 Difference]: With dead ends: 911 [2022-11-19 07:56:12,990 INFO L226 Difference]: Without dead ends: 911 [2022-11-19 07:56:12,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=55, Invalid=123, Unknown=4, NotChecked=0, Total=182 [2022-11-19 07:56:12,991 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:12,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-11-19 07:56:12,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-11-19 07:56:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 907. [2022-11-19 07:56:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 797 states have (on average 3.710163111668758) internal successors, (2957), 906 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2957 transitions. [2022-11-19 07:56:13,016 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2957 transitions. Word has length 7 [2022-11-19 07:56:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:13,016 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 2957 transitions. [2022-11-19 07:56:13,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:13,017 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2957 transitions. [2022-11-19 07:56:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:13,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:13,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:13,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-19 07:56:13,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:56:13,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:13,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:13,625 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:13,625 INFO L85 PathProgramCache]: Analyzing trace with hash -391226888, now seen corresponding path program 1 times [2022-11-19 07:56:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:13,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581546196] [2022-11-19 07:56:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:13,626 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 [2022-11-19 07:56:13,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:13,627 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:13,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:56:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:13,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:56:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:13,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:13,989 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:56:13,990 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 [2022-11-19 07:56:14,001 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 [2022-11-19 07:56:14,059 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:56:14,059 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 [2022-11-19 07:56:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:14,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:14,997 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581546196] [2022-11-19 07:56:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581546196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1181719653] [2022-11-19 07:56:14,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:14,999 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-19 07:56:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:15,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:56:15,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:15,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:15,433 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-19 07:56:15,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-19 07:56:15,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:15,506 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 [2022-11-19 07:56:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:15,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:15,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1181719653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:15,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:56:15,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 4] total 9 [2022-11-19 07:56:15,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750813736] [2022-11-19 07:56:15,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:56:15,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:15,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:56:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:56:15,663 INFO L87 Difference]: Start difference. First operand 907 states and 2957 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) [2022-11-19 07:56:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:15,966 INFO L93 Difference]: Finished difference Result 863 states and 2834 transitions. [2022-11-19 07:56:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:15,967 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 [2022-11-19 07:56:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:15,969 INFO L225 Difference]: With dead ends: 863 [2022-11-19 07:56:15,969 INFO L226 Difference]: Without dead ends: 863 [2022-11-19 07:56:15,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:56:15,970 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:15,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 07:56:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-11-19 07:56:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 845. [2022-11-19 07:56:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 751 states have (on average 3.7017310252996007) internal successors, (2780), 844 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2780 transitions. [2022-11-19 07:56:15,989 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2780 transitions. Word has length 8 [2022-11-19 07:56:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:15,990 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 2780 transitions. [2022-11-19 07:56:15,990 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) [2022-11-19 07:56:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2780 transitions. [2022-11-19 07:56:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:15,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:15,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:16,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:16,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:16,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:16,394 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:16,394 INFO L85 PathProgramCache]: Analyzing trace with hash 544570295, now seen corresponding path program 1 times [2022-11-19 07:56:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:16,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [187484477] [2022-11-19 07:56:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:16,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:16,396 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:16,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-19 07:56:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:16,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:56:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:16,778 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:16,780 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 [2022-11-19 07:56:16,968 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:16,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:56:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:17,176 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 [2022-11-19 07:56:17,194 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:17,194 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 [2022-11-19 07:56:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:20,511 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:20,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [187484477] [2022-11-19 07:56:20,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [187484477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:20,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [45302143] [2022-11-19 07:56:20,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:20,512 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:20,515 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:20,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-19 07:56:20,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:20,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:56:20,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:20,999 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:20,999 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 [2022-11-19 07:56:21,198 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:21,198 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 [2022-11-19 07:56:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:21,412 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 [2022-11-19 07:56:21,437 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:21,437 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 [2022-11-19 07:56:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:21,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:24,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [45302143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:24,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973110905] [2022-11-19 07:56:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:24,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:24,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:24,930 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:24,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:56:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:25,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:56:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:25,239 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:25,240 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 [2022-11-19 07:56:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:25,406 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 [2022-11-19 07:56:25,431 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:25,432 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 [2022-11-19 07:56:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:25,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:29,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:56:29,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:56:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:31,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973110905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:31,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:56:31,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-19 07:56:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719573833] [2022-11-19 07:56:31,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:31,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:56:31,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:31,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:56:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-19 07:56:31,673 INFO L87 Difference]: Start difference. First operand 845 states and 2780 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-19 07:56:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:32,176 INFO L93 Difference]: Finished difference Result 875 states and 2845 transitions. [2022-11-19 07:56:32,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:56:32,177 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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 8 [2022-11-19 07:56:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:32,179 INFO L225 Difference]: With dead ends: 875 [2022-11-19 07:56:32,180 INFO L226 Difference]: Without dead ends: 875 [2022-11-19 07:56:32,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-19 07:56:32,180 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:32,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 164 Unchecked, 0.5s Time] [2022-11-19 07:56:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-11-19 07:56:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 868. [2022-11-19 07:56:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 774 states have (on average 3.657622739018088) internal successors, (2831), 867 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2831 transitions. [2022-11-19 07:56:32,199 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2831 transitions. Word has length 8 [2022-11-19 07:56:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:32,200 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 2831 transitions. [2022-11-19 07:56:32,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 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) [2022-11-19 07:56:32,200 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2831 transitions. [2022-11-19 07:56:32,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:32,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:32,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:32,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:32,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:32,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:32,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:32,804 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:32,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:32,805 INFO L85 PathProgramCache]: Analyzing trace with hash 559251700, now seen corresponding path program 1 times [2022-11-19 07:56:32,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:32,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524094880] [2022-11-19 07:56:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:32,805 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 [2022-11-19 07:56:32,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:32,806 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:32,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:56:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:56:32,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:33,077 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 07:56:33,077 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 07:56:33,152 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:56:33,153 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 [2022-11-19 07:56:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:33,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:33,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:33,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524094880] [2022-11-19 07:56:33,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524094880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:33,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:33,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:56:33,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423344954] [2022-11-19 07:56:33,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:33,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:56:33,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:33,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:56:33,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:33,273 INFO L87 Difference]: Start difference. First operand 868 states and 2831 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) [2022-11-19 07:56:33,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:33,588 INFO L93 Difference]: Finished difference Result 884 states and 2859 transitions. [2022-11-19 07:56:33,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:56:33,589 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 [2022-11-19 07:56:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:33,594 INFO L225 Difference]: With dead ends: 884 [2022-11-19 07:56:33,595 INFO L226 Difference]: Without dead ends: 884 [2022-11-19 07:56:33,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:33,601 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:33,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 14 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-19 07:56:33,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-19 07:56:33,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 876. [2022-11-19 07:56:33,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 782 states have (on average 3.6419437340153453) internal successors, (2848), 875 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:33,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2848 transitions. [2022-11-19 07:56:33,615 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2848 transitions. Word has length 8 [2022-11-19 07:56:33,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:33,615 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 2848 transitions. [2022-11-19 07:56:33,616 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) [2022-11-19 07:56:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2848 transitions. [2022-11-19 07:56:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:33,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:33,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:33,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:56:33,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:33,818 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:33,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:33,818 INFO L85 PathProgramCache]: Analyzing trace with hash 559251297, now seen corresponding path program 1 times [2022-11-19 07:56:33,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:33,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631319631] [2022-11-19 07:56:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:33,818 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 [2022-11-19 07:56:33,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:33,820 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:33,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-19 07:56:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:33,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:56:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:34,082 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-19 07:56:34,083 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-19 07:56:34,168 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:56:34,168 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 [2022-11-19 07:56:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:56:34,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:56:34,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631319631] [2022-11-19 07:56:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631319631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:56:34,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:56:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:56:34,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599230] [2022-11-19 07:56:34,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:56:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:56:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:56:34,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:34,310 INFO L87 Difference]: Start difference. First operand 876 states and 2848 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) [2022-11-19 07:56:34,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:34,553 INFO L93 Difference]: Finished difference Result 836 states and 2732 transitions. [2022-11-19 07:56:34,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:56:34,554 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 [2022-11-19 07:56:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:34,556 INFO L225 Difference]: With dead ends: 836 [2022-11-19 07:56:34,556 INFO L226 Difference]: Without dead ends: 836 [2022-11-19 07:56:34,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:56:34,557 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:34,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:56:34,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-19 07:56:34,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 824. [2022-11-19 07:56:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 745 states have (on average 3.6228187919463086) internal successors, (2699), 823 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2699 transitions. [2022-11-19 07:56:34,574 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2699 transitions. Word has length 8 [2022-11-19 07:56:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:34,575 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 2699 transitions. [2022-11-19 07:56:34,575 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) [2022-11-19 07:56:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2699 transitions. [2022-11-19 07:56:34,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:34,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:34,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:34,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:56:34,776 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash 559251430, now seen corresponding path program 1 times [2022-11-19 07:56:34,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316420437] [2022-11-19 07:56:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:34,777 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 [2022-11-19 07:56:34,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:34,777 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:34,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 07:56:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:56:34,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:35,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:35,121 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 [2022-11-19 07:56:35,311 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:35,312 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 [2022-11-19 07:56:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:35,485 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 [2022-11-19 07:56:35,504 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:35,505 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 [2022-11-19 07:56:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:35,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:37,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316420437] [2022-11-19 07:56:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316420437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792684208] [2022-11-19 07:56:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:37,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:37,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:37,045 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:37,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-19 07:56:37,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:37,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:56:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:37,507 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:37,507 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 [2022-11-19 07:56:37,698 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:37,699 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 [2022-11-19 07:56:37,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:37,924 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 [2022-11-19 07:56:37,944 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:37,944 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 [2022-11-19 07:56:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:38,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:45,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792684208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624309142] [2022-11-19 07:56:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:45,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:45,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:45,191 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:45,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:56:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:45,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:56:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:45,508 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:45,508 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 [2022-11-19 07:56:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:45,692 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 [2022-11-19 07:56:45,707 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:45,707 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 [2022-11-19 07:56:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:45,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:50,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:56:50,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:56:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:53,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624309142] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:53,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:56:53,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-19 07:56:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88594572] [2022-11-19 07:56:53,346 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:56:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:56:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:56:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-19 07:56:53,347 INFO L87 Difference]: Start difference. First operand 824 states and 2699 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2022-11-19 07:56:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:53,706 INFO L93 Difference]: Finished difference Result 840 states and 2727 transitions. [2022-11-19 07:56:53,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:56:53,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 8 [2022-11-19 07:56:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:53,711 INFO L225 Difference]: With dead ends: 840 [2022-11-19 07:56:53,711 INFO L226 Difference]: Without dead ends: 840 [2022-11-19 07:56:53,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-19 07:56:53,712 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:53,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-11-19 07:56:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-19 07:56:53,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 831. [2022-11-19 07:56:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 752 states have (on average 3.6117021276595747) internal successors, (2716), 830 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:56:53,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2716 transitions. [2022-11-19 07:56:53,736 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2716 transitions. Word has length 8 [2022-11-19 07:56:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:53,736 INFO L495 AbstractCegarLoop]: Abstraction has 831 states and 2716 transitions. [2022-11-19 07:56:53,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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) [2022-11-19 07:56:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2716 transitions. [2022-11-19 07:56:53,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:56:53,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:53,738 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:53,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:53,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:56:54,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-19 07:56:54,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:54,350 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:56:54,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:54,351 INFO L85 PathProgramCache]: Analyzing trace with hash -810235083, now seen corresponding path program 1 times [2022-11-19 07:56:54,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:56:54,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620590149] [2022-11-19 07:56:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:54,351 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 [2022-11-19 07:56:54,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:56:54,352 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:56:54,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-19 07:56:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:56:54,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:54,762 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:54,762 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 [2022-11-19 07:56:54,963 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:54,964 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 [2022-11-19 07:56:55,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:55,240 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 19 treesize of output 19 [2022-11-19 07:56:55,257 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:55,257 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 [2022-11-19 07:56:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:55,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:58,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:56:58,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620590149] [2022-11-19 07:56:58,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620590149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:56:58,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332167972] [2022-11-19 07:56:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:58,315 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:56:58,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:56:58,316 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:56:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 07:56:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:58,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:56:58,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:58,821 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:56:58,821 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 [2022-11-19 07:56:59,019 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:56:59,019 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 [2022-11-19 07:56:59,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:59,366 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 [2022-11-19 07:56:59,387 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:56:59,388 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 [2022-11-19 07:56:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:59,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:05,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1332167972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:05,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726768742] [2022-11-19 07:57:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:05,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:05,745 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:05,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:57:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:05,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:57:05,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:06,080 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:06,080 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 [2022-11-19 07:57:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:06,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-19 07:57:06,358 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:06,358 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 [2022-11-19 07:57:06,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:06,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:07,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:57:07,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:57:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:10,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726768742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:10,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:57:10,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-19 07:57:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645734578] [2022-11-19 07:57:10,640 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:10,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 07:57:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:57:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 07:57:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=222, Unknown=1, NotChecked=0, Total=306 [2022-11-19 07:57:10,641 INFO L87 Difference]: Start difference. First operand 831 states and 2716 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:16,519 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 50 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:57:16,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:16,753 INFO L93 Difference]: Finished difference Result 840 states and 2735 transitions. [2022-11-19 07:57:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:57:16,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-19 07:57:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:16,756 INFO L225 Difference]: With dead ends: 840 [2022-11-19 07:57:16,756 INFO L226 Difference]: Without dead ends: 840 [2022-11-19 07:57:16,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=95, Invalid=246, Unknown=1, NotChecked=0, Total=342 [2022-11-19 07:57:16,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:16,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2022-11-19 07:57:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-11-19 07:57:16,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 836. [2022-11-19 07:57:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 757 states have (on average 3.603698811096433) internal successors, (2728), 835 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:16,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2728 transitions. [2022-11-19 07:57:16,777 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2728 transitions. Word has length 8 [2022-11-19 07:57:16,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:16,777 INFO L495 AbstractCegarLoop]: Abstraction has 836 states and 2728 transitions. [2022-11-19 07:57:16,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:16,777 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2728 transitions. [2022-11-19 07:57:16,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:57:16,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:16,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:16,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:16,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-19 07:57:17,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:17,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:17,379 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:57:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2100438507, now seen corresponding path program 1 times [2022-11-19 07:57:17,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:57:17,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [490962899] [2022-11-19 07:57:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:17,380 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 [2022-11-19 07:57:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:57:17,381 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:57:17,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:57:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:17,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:57:17,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:17,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:57:17,543 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:57:17,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [490962899] [2022-11-19 07:57:17,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [490962899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:17,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:17,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:57:17,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332867867] [2022-11-19 07:57:17,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:17,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:17,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:57:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:17,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:17,545 INFO L87 Difference]: Start difference. First operand 836 states and 2728 transitions. Second operand has 3 states, 2 states have (on average 4.5) 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) [2022-11-19 07:57:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:17,770 INFO L93 Difference]: Finished difference Result 641 states and 1968 transitions. [2022-11-19 07:57:17,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) 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 [2022-11-19 07:57:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:17,772 INFO L225 Difference]: With dead ends: 641 [2022-11-19 07:57:17,772 INFO L226 Difference]: Without dead ends: 637 [2022-11-19 07:57:17,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:17,773 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:17,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:57:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-11-19 07:57:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2022-11-19 07:57:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 597 states have (on average 3.2830820770519265) internal successors, (1960), 636 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1960 transitions. [2022-11-19 07:57:17,789 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1960 transitions. Word has length 9 [2022-11-19 07:57:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:17,790 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 1960 transitions. [2022-11-19 07:57:17,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) 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) [2022-11-19 07:57:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1960 transitions. [2022-11-19 07:57:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:57:17,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:17,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:17,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:57:18,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:57:18,004 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:57:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -298188348, now seen corresponding path program 1 times [2022-11-19 07:57:18,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:57:18,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1382630220] [2022-11-19 07:57:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:18,005 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 [2022-11-19 07:57:18,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:57:18,006 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:57:18,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:57:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:57:18,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:18,426 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:18,427 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 [2022-11-19 07:57:18,620 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:57:18,620 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 [2022-11-19 07:57:18,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:18,838 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 [2022-11-19 07:57:18,859 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:18,859 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 [2022-11-19 07:57:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:18,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:24,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:57:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1382630220] [2022-11-19 07:57:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1382630220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952065722] [2022-11-19 07:57:24,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:24,681 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:57:24,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:57:24,682 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:57:24,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-19 07:57:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:57:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:25,233 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:25,234 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 [2022-11-19 07:57:25,465 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:57:25,465 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 [2022-11-19 07:57:25,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:25,697 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 [2022-11-19 07:57:25,712 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:25,712 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 [2022-11-19 07:57:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:25,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:34,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952065722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:34,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519737353] [2022-11-19 07:57:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:34,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:34,775 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:34,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 07:57:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:34,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:57:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:35,121 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:35,121 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 [2022-11-19 07:57:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:35,289 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 [2022-11-19 07:57:35,310 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:35,310 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 [2022-11-19 07:57:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:35,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:37,155 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:57:37,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:57:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:57:42,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519737353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:42,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:57:42,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 07:57:42,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245795149] [2022-11-19 07:57:42,981 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:57:42,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:57:42,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:57:42,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:57:42,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=123, Unknown=5, NotChecked=0, Total=182 [2022-11-19 07:57:42,982 INFO L87 Difference]: Start difference. First operand 637 states and 1960 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:43,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:43,228 INFO L93 Difference]: Finished difference Result 646 states and 1979 transitions. [2022-11-19 07:57:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:57:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2022-11-19 07:57:43,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:43,230 INFO L225 Difference]: With dead ends: 646 [2022-11-19 07:57:43,231 INFO L226 Difference]: Without dead ends: 646 [2022-11-19 07:57:43,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=54, Invalid=123, Unknown=5, NotChecked=0, Total=182 [2022-11-19 07:57:43,231 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:43,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 24 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-11-19 07:57:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-11-19 07:57:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 633. [2022-11-19 07:57:43,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 593 states have (on average 3.288364249578415) internal successors, (1950), 632 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1950 transitions. [2022-11-19 07:57:43,242 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1950 transitions. Word has length 9 [2022-11-19 07:57:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:43,243 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1950 transitions. [2022-11-19 07:57:43,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1950 transitions. [2022-11-19 07:57:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:57:43,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:43,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:43,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:43,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:57:43,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:57:43,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:57:43,844 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:57:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 156920544, now seen corresponding path program 1 times [2022-11-19 07:57:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:57:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577087884] [2022-11-19 07:57:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:43,845 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 [2022-11-19 07:57:43,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:57:43,847 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:57:43,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:57:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:57:44,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:44,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:44,229 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 [2022-11-19 07:57:44,452 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:57:44,453 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 [2022-11-19 07:57:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:44,616 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 [2022-11-19 07:57:44,633 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:44,634 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 [2022-11-19 07:57:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:44,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:50,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:57:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577087884] [2022-11-19 07:57:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577087884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1832633872] [2022-11-19 07:57:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:50,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:57:50,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:57:50,072 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:57:50,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-19 07:57:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:57:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:50,582 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:50,583 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 07:57:50,770 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:57:50,770 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 [2022-11-19 07:57:50,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:51,000 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 [2022-11-19 07:57:51,023 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:51,024 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 [2022-11-19 07:57:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:51,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:53,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1832633872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:57:53,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491728359] [2022-11-19 07:57:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:53,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:57:53,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:53,710 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:57:53,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-19 07:57:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:57:53,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:57:54,090 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:57:54,090 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 [2022-11-19 07:57:54,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:57:54,254 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 [2022-11-19 07:57:54,270 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:57:54,271 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 [2022-11-19 07:57:54,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:54,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:57:58,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:57:58,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:58:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:01,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491728359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:01,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:58:01,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-19 07:58:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582158630] [2022-11-19 07:58:01,946 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:01,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:58:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:58:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:58:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-19 07:58:01,947 INFO L87 Difference]: Start difference. First operand 633 states and 1950 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-19 07:58:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:02,483 INFO L93 Difference]: Finished difference Result 673 states and 2060 transitions. [2022-11-19 07:58:02,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:58:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 9 [2022-11-19 07:58:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:02,486 INFO L225 Difference]: With dead ends: 673 [2022-11-19 07:58:02,486 INFO L226 Difference]: Without dead ends: 673 [2022-11-19 07:58:02,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-19 07:58:02,496 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:02,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-11-19 07:58:02,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-19 07:58:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 661. [2022-11-19 07:58:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 621 states have (on average 3.288244766505636) internal successors, (2042), 660 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 2042 transitions. [2022-11-19 07:58:02,508 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 2042 transitions. Word has length 9 [2022-11-19 07:58:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 2042 transitions. [2022-11-19 07:58:02,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-11-19 07:58:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 2042 transitions. [2022-11-19 07:58:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:58:02,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:02,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:02,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:02,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:58:02,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:03,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:03,111 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:58:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 164053148, now seen corresponding path program 1 times [2022-11-19 07:58:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:58:03,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98962282] [2022-11-19 07:58:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:03,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:58:03,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:58:03,113 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:58:03,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:58:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:03,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:58:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:03,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:03,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:58:03,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98962282] [2022-11-19 07:58:03,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98962282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:03,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:03,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:58:03,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712839401] [2022-11-19 07:58:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:03,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:58:03,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:58:03,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:58:03,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:58:03,311 INFO L87 Difference]: Start difference. First operand 661 states and 2042 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-19 07:58:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:03,697 INFO L93 Difference]: Finished difference Result 683 states and 2079 transitions. [2022-11-19 07:58:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:58:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2022-11-19 07:58:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:03,699 INFO L225 Difference]: With dead ends: 683 [2022-11-19 07:58:03,700 INFO L226 Difference]: Without dead ends: 683 [2022-11-19 07:58:03,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:58:03,701 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:03,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:58:03,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-11-19 07:58:03,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 683. [2022-11-19 07:58:03,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 637 states have (on average 3.2637362637362637) internal successors, (2079), 682 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2079 transitions. [2022-11-19 07:58:03,716 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2079 transitions. Word has length 9 [2022-11-19 07:58:03,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:03,716 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 2079 transitions. [2022-11-19 07:58:03,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2022-11-19 07:58:03,720 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2079 transitions. [2022-11-19 07:58:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:58:03,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:03,721 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:03,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:03,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:58:03,931 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:58:03,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:03,931 INFO L85 PathProgramCache]: Analyzing trace with hash 637838889, now seen corresponding path program 1 times [2022-11-19 07:58:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:58:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885407336] [2022-11-19 07:58:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:03,932 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 [2022-11-19 07:58:03,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:58:03,933 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:58:03,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:58:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:58:04,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:04,377 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:58:04,377 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 [2022-11-19 07:58:04,589 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:58:04,590 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 [2022-11-19 07:58:04,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:58:04,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 07:58:04,903 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:58:04,904 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 [2022-11-19 07:58:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:05,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:12,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:58:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885407336] [2022-11-19 07:58:12,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885407336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:12,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879589511] [2022-11-19 07:58:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:12,896 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:58:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:58:12,897 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:58:12,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-19 07:58:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:58:13,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:13,495 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:58:13,495 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 [2022-11-19 07:58:13,712 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:58:13,713 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 [2022-11-19 07:58:14,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:58:14,121 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 [2022-11-19 07:58:14,145 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:58:14,146 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 [2022-11-19 07:58:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:14,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:25,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879589511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806286106] [2022-11-19 07:58:25,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:25,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:25,632 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:25,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 07:58:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:25,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:58:25,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:26,006 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:58:26,006 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 [2022-11-19 07:58:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:58:26,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-19 07:58:26,341 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:58:26,341 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 [2022-11-19 07:58:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:26,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:31,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:58:31,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 07:58:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:34,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806286106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:34,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:58:34,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 17 [2022-11-19 07:58:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695211422] [2022-11-19 07:58:34,093 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:34,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:58:34,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:58:34,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:58:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=246, Unknown=2, NotChecked=0, Total=342 [2022-11-19 07:58:34,095 INFO L87 Difference]: Start difference. First operand 683 states and 2079 transitions. Second operand has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2022-11-19 07:58:43,732 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 65 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:58:44,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:44,104 INFO L93 Difference]: Finished difference Result 696 states and 2107 transitions. [2022-11-19 07:58:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:58:44,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:58:44,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:44,108 INFO L225 Difference]: With dead ends: 696 [2022-11-19 07:58:44,108 INFO L226 Difference]: Without dead ends: 696 [2022-11-19 07:58:44,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=107, Invalid=271, Unknown=2, NotChecked=0, Total=380 [2022-11-19 07:58:44,110 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:44,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 95 Invalid, 0 Unknown, 135 Unchecked, 0.5s Time] [2022-11-19 07:58:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-19 07:58:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 693. [2022-11-19 07:58:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 647 states have (on average 3.2457496136012365) internal successors, (2100), 692 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:58:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 2100 transitions. [2022-11-19 07:58:44,129 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 2100 transitions. Word has length 9 [2022-11-19 07:58:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:44,130 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 2100 transitions. [2022-11-19 07:58:44,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2022-11-19 07:58:44,130 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 2100 transitions. [2022-11-19 07:58:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:58:44,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:44,131 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:44,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:44,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:58:44,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:58:44,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:58:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:44,741 INFO L85 PathProgramCache]: Analyzing trace with hash 652520272, now seen corresponding path program 1 times [2022-11-19 07:58:44,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:58:44,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868420529] [2022-11-19 07:58:44,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:44,741 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 [2022-11-19 07:58:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:58:44,742 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:58:44,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:58:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:44,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:58:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:45,245 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:58:45,245 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 [2022-11-19 07:58:45,507 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:58:45,508 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 [2022-11-19 07:58:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:58:45,779 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 21 treesize of output 21 [2022-11-19 07:58:45,796 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:58:45,796 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 [2022-11-19 07:58:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:53,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:58:53,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868420529] [2022-11-19 07:58:53,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868420529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:53,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [641218077] [2022-11-19 07:58:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:53,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:58:53,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:58:53,666 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:58:53,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-19 07:58:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:54,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:58:54,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:54,308 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:58:54,308 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 [2022-11-19 07:58:54,557 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:58:54,557 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 15 treesize of output 50 [2022-11-19 07:58:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:58:55,079 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 [2022-11-19 07:58:55,105 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:58:55,105 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 [2022-11-19 07:58:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:55,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:59,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [641218077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:59,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210449511] [2022-11-19 07:58:59,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:59,930 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:59,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-19 07:59:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:00,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:59:00,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:00,340 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:00,341 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 [2022-11-19 07:59:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:00,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 07:59:00,651 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:59:00,651 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 [2022-11-19 07:59:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:00,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:06,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:59:06,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 130 [2022-11-19 07:59:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:09,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210449511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:09,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:59:09,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-11-19 07:59:09,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143053023] [2022-11-19 07:59:09,509 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:09,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:59:09,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:59:09,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:59:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:59:09,510 INFO L87 Difference]: Start difference. First operand 693 states and 2100 transitions. Second operand has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:16,966 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:59:25,356 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 54 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:59:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:26,019 INFO L93 Difference]: Finished difference Result 702 states and 2121 transitions. [2022-11-19 07:59:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:59:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:59:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:26,022 INFO L225 Difference]: With dead ends: 702 [2022-11-19 07:59:26,022 INFO L226 Difference]: Without dead ends: 702 [2022-11-19 07:59:26,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:59:26,023 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:26,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 167 Unchecked, 0.9s Time] [2022-11-19 07:59:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-19 07:59:26,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 698. [2022-11-19 07:59:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 652 states have (on average 3.2423312883435584) internal successors, (2114), 697 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:26,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2114 transitions. [2022-11-19 07:59:26,036 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2114 transitions. Word has length 9 [2022-11-19 07:59:26,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:26,036 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 2114 transitions. [2022-11-19 07:59:26,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:59:26,037 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2114 transitions. [2022-11-19 07:59:26,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:59:26,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:59:26,037 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:26,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:26,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-19 07:59:26,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:59:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:59:26,640 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 07:59:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:59:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash 652520024, now seen corresponding path program 1 times [2022-11-19 07:59:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:59:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919795620] [2022-11-19 07:59:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:26,641 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 [2022-11-19 07:59:26,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:59:26,643 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:59:26,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:59:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:26,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:59:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:27,084 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:27,084 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 [2022-11-19 07:59:27,309 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:59:27,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-19 07:59:27,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:27,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-19 07:59:27,623 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:59:27,624 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 [2022-11-19 07:59:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:27,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:30,525 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:59:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919795620] [2022-11-19 07:59:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919795620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:30,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1760787983] [2022-11-19 07:59:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:30,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:59:30,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:59:30,528 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:59:30,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-19 07:59:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:30,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:59:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:31,111 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:31,111 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 [2022-11-19 07:59:31,322 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 07:59:31,322 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 [2022-11-19 07:59:31,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:31,722 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 [2022-11-19 07:59:31,747 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:59:31,747 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 [2022-11-19 07:59:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1760787983] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:46,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167036375] [2022-11-19 07:59:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:59:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:59:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:59:46,270 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:59:46,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-19 07:59:46,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:59:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:59:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:59:46,675 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 07:59:46,676 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 [2022-11-19 07:59:47,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:59:47,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-19 07:59:47,050 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:59:47,051 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 [2022-11-19 07:59:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:59:47,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:59,454 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:59:59,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-19 08:00:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:03,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167036375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:03,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:00:03,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-19 08:00:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055360150] [2022-11-19 08:00:03,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:00:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:00:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2022-11-19 08:00:03,985 INFO L87 Difference]: Start difference. First operand 698 states and 2114 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-11-19 08:00:16,816 WARN L233 SmtUtils]: Spent 12.46s on a formula simplification. DAG size of input: 65 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:00:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:16,985 INFO L93 Difference]: Finished difference Result 705 states and 2126 transitions. [2022-11-19 08:00:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:00:16,986 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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 9 [2022-11-19 08:00:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:16,988 INFO L225 Difference]: With dead ends: 705 [2022-11-19 08:00:16,988 INFO L226 Difference]: Without dead ends: 705 [2022-11-19 08:00:16,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=120, Invalid=296, Unknown=4, NotChecked=0, Total=420 [2022-11-19 08:00:16,988 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:16,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 150 Unchecked, 0.3s Time] [2022-11-19 08:00:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2022-11-19 08:00:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 700. [2022-11-19 08:00:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 654 states have (on average 3.2400611620795106) internal successors, (2119), 699 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2119 transitions. [2022-11-19 08:00:17,004 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2119 transitions. Word has length 9 [2022-11-19 08:00:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:17,005 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 2119 transitions. [2022-11-19 08:00:17,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 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) [2022-11-19 08:00:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2119 transitions. [2022-11-19 08:00:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:00:17,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:17,006 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:17,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-19 08:00:17,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:17,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:17,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:17,607 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:00:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash -716966347, now seen corresponding path program 2 times [2022-11-19 08:00:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [799843238] [2022-11-19 08:00:17,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:00:17,608 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 [2022-11-19 08:00:17,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:17,609 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:00:17,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:00:17,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:00:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:00:17,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:00:17,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:18,043 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:00:18,043 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 [2022-11-19 08:00:18,276 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-19 08:00:18,276 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 [2022-11-19 08:00:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:00:18,428 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 [2022-11-19 08:00:18,456 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:00:18,456 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 [2022-11-19 08:00:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:00:18,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:18,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [799843238] [2022-11-19 08:00:18,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [799843238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:18,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:18,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:00:18,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106805480] [2022-11-19 08:00:18,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:18,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:18,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:18,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:18,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:18,535 INFO L87 Difference]: Start difference. First operand 700 states and 2119 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) [2022-11-19 08:00:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:18,947 INFO L93 Difference]: Finished difference Result 442 states and 1268 transitions. [2022-11-19 08:00:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:18,948 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 9 [2022-11-19 08:00:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:18,949 INFO L225 Difference]: With dead ends: 442 [2022-11-19 08:00:18,949 INFO L226 Difference]: Without dead ends: 442 [2022-11-19 08:00:18,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:18,950 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:18,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:00:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-19 08:00:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 354. [2022-11-19 08:00:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 341 states have (on average 3.0850439882697946) internal successors, (1052), 353 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 1052 transitions. [2022-11-19 08:00:18,958 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 1052 transitions. Word has length 9 [2022-11-19 08:00:18,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:18,958 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 1052 transitions. [2022-11-19 08:00:18,958 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) [2022-11-19 08:00:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 1052 transitions. [2022-11-19 08:00:18,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:00:18,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:18,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:18,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:00:19,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:19,159 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:00:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:19,160 INFO L85 PathProgramCache]: Analyzing trace with hash -689089090, now seen corresponding path program 1 times [2022-11-19 08:00:19,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:19,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [290728803] [2022-11-19 08:00:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:19,160 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 [2022-11-19 08:00:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:19,161 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:00:19,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:00:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:00:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:19,345 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 [2022-11-19 08:00:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:19,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:19,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:19,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [290728803] [2022-11-19 08:00:19,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [290728803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:19,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:19,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:00:19,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079778411] [2022-11-19 08:00:19,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:19,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:00:19,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:00:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:00:19,392 INFO L87 Difference]: Start difference. First operand 354 states and 1052 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-11-19 08:00:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:19,675 INFO L93 Difference]: Finished difference Result 272 states and 788 transitions. [2022-11-19 08:00:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:00:19,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2022-11-19 08:00:19,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:19,676 INFO L225 Difference]: With dead ends: 272 [2022-11-19 08:00:19,677 INFO L226 Difference]: Without dead ends: 272 [2022-11-19 08:00:19,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:00:19,677 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:19,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:00:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-19 08:00:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-11-19 08:00:19,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 265 states have (on average 2.973584905660377) internal successors, (788), 271 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 788 transitions. [2022-11-19 08:00:19,683 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 788 transitions. Word has length 10 [2022-11-19 08:00:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:19,683 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 788 transitions. [2022-11-19 08:00:19,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-11-19 08:00:19,684 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 788 transitions. [2022-11-19 08:00:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:00:19,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:19,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:00:19,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:19,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:19,885 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:00:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -689089089, now seen corresponding path program 1 times [2022-11-19 08:00:19,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:19,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1591277292] [2022-11-19 08:00:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:19,886 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 [2022-11-19 08:00:19,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:19,887 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:00:19,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-19 08:00:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:00:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:20,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:00:20,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:20,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1591277292] [2022-11-19 08:00:20,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1591277292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:00:20,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:00:20,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:00:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637355090] [2022-11-19 08:00:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:00:20,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:00:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:00:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:20,103 INFO L87 Difference]: Start difference. First operand 272 states and 788 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 08:00:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:00:20,490 INFO L93 Difference]: Finished difference Result 284 states and 804 transitions. [2022-11-19 08:00:20,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:00:20,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2022-11-19 08:00:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:00:20,491 INFO L225 Difference]: With dead ends: 284 [2022-11-19 08:00:20,491 INFO L226 Difference]: Without dead ends: 255 [2022-11-19 08:00:20,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:00:20,492 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:00:20,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:00:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-19 08:00:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-11-19 08:00:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 248 states have (on average 2.975806451612903) internal successors, (738), 254 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:00:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 738 transitions. [2022-11-19 08:00:20,498 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 738 transitions. Word has length 10 [2022-11-19 08:00:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:00:20,498 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 738 transitions. [2022-11-19 08:00:20,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2022-11-19 08:00:20,498 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 738 transitions. [2022-11-19 08:00:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:00:20,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:00:20,499 INFO L195 NwaCegarLoop]: trace histogram [8, 1, 1, 1] [2022-11-19 08:00:20,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-19 08:00:20,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:00:20,704 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:00:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:00:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2030969767, now seen corresponding path program 1 times [2022-11-19 08:00:20,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:00:20,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [919370574] [2022-11-19 08:00:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:20,705 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 [2022-11-19 08:00:20,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:00:20,706 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:00:20,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:00:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:20,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:00:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:20,972 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 [2022-11-19 08:00:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:21,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:24,605 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:00:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [919370574] [2022-11-19 08:00:24,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [919370574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:24,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1390058238] [2022-11-19 08:00:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:24,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:00:24,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:00:24,607 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:00:24,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-19 08:00:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:25,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:00:25,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:25,018 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 [2022-11-19 08:00:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:25,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:26,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1390058238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:26,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133986638] [2022-11-19 08:00:26,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:00:26,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:00:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:00:26,771 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:00:26,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-19 08:00:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:00:27,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:00:27,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:00:27,046 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 [2022-11-19 08:00:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:27,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:00:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:00:27,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133986638] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:00:27,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:00:27,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 27 [2022-11-19 08:00:27,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680790485] [2022-11-19 08:00:27,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:00:27,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 08:00:27,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:00:27,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 08:00:27,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:00:27,676 INFO L87 Difference]: Start difference. First operand 255 states and 738 transitions. Second operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 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) [2022-11-19 08:00:35,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:37,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:39,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:41,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:43,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:45,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:47,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:00:49,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:19,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:19,064 INFO L93 Difference]: Finished difference Result 3994 states and 12269 transitions. [2022-11-19 08:01:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:01:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 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 11 [2022-11-19 08:01:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:19,075 INFO L225 Difference]: With dead ends: 3994 [2022-11-19 08:01:19,075 INFO L226 Difference]: Without dead ends: 3994 [2022-11-19 08:01:19,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=690, Invalid=1202, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:01:19,076 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2567 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 166 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2567 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2567 Valid, 363 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3064 Invalid, 8 Unknown, 0 Unchecked, 32.5s Time] [2022-11-19 08:01:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2022-11-19 08:01:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 271. [2022-11-19 08:01:19,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 264 states have (on average 2.878787878787879) internal successors, (760), 270 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 760 transitions. [2022-11-19 08:01:19,105 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 760 transitions. Word has length 11 [2022-11-19 08:01:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:19,106 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 760 transitions. [2022-11-19 08:01:19,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 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) [2022-11-19 08:01:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 760 transitions. [2022-11-19 08:01:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:01:19,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:19,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:19,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:01:19,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:19,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:19,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:19,720 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:01:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 490075004, now seen corresponding path program 1 times [2022-11-19 08:01:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:19,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2038291282] [2022-11-19 08:01:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:19,722 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 [2022-11-19 08:01:19,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:19,722 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:01:19,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:01:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:01:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:20,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:01:20,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:20,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2038291282] [2022-11-19 08:01:20,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2038291282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:01:20,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:01:20,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:01:20,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507589564] [2022-11-19 08:01:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:01:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:01:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:01:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:01:20,081 INFO L87 Difference]: Start difference. First operand 271 states and 760 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) [2022-11-19 08:01:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:20,608 INFO L93 Difference]: Finished difference Result 352 states and 973 transitions. [2022-11-19 08:01:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:01:20,608 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 [2022-11-19 08:01:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:20,609 INFO L225 Difference]: With dead ends: 352 [2022-11-19 08:01:20,610 INFO L226 Difference]: Without dead ends: 271 [2022-11-19 08:01:20,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:01:20,611 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:20,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:01:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-19 08:01:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-11-19 08:01:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 264 states have (on average 2.875) internal successors, (759), 270 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 759 transitions. [2022-11-19 08:01:20,618 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 759 transitions. Word has length 11 [2022-11-19 08:01:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:20,632 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 759 transitions. [2022-11-19 08:01:20,632 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) [2022-11-19 08:01:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 759 transitions. [2022-11-19 08:01:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:01:20,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:20,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:01:20,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:01:20,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:01:20,848 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:01:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1327842082, now seen corresponding path program 1 times [2022-11-19 08:01:20,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929672212] [2022-11-19 08:01:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:20,849 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 [2022-11-19 08:01:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:20,850 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:01:20,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 08:01:21,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:21,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:01:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:21,133 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 [2022-11-19 08:01:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:21,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:22,760 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929672212] [2022-11-19 08:01:22,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929672212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [707588281] [2022-11-19 08:01:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:22,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:22,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:01:22,762 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:01:22,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-19 08:01:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:01:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:23,157 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 [2022-11-19 08:01:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:23,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:24,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [707588281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68539883] [2022-11-19 08:01:24,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:01:24,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:24,332 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:24,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-19 08:01:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:01:24,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:01:24,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:24,566 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 [2022-11-19 08:01:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:24,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:01:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68539883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:25,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:25,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 08:01:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24996993] [2022-11-19 08:01:25,294 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:25,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:01:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:25,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:01:25,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:01:25,295 INFO L87 Difference]: Start difference. First operand 271 states and 759 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2022-11-19 08:01:26,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:01:26,306 INFO L93 Difference]: Finished difference Result 476 states and 1396 transitions. [2022-11-19 08:01:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:01:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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 [2022-11-19 08:01:26,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:01:26,308 INFO L225 Difference]: With dead ends: 476 [2022-11-19 08:01:26,308 INFO L226 Difference]: Without dead ends: 476 [2022-11-19 08:01:26,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:01:26,309 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 125 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:01:26,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 23 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2022-11-19 08:01:26,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-19 08:01:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 429. [2022-11-19 08:01:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 422 states have (on average 2.9834123222748814) internal successors, (1259), 428 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1259 transitions. [2022-11-19 08:01:26,320 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1259 transitions. Word has length 12 [2022-11-19 08:01:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:01:26,321 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 1259 transitions. [2022-11-19 08:01:26,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 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) [2022-11-19 08:01:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1259 transitions. [2022-11-19 08:01:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:01:26,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:01:26,321 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:01:26,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:26,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:26,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-19 08:01:26,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:26,924 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:01:26,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:01:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1288544979, now seen corresponding path program 3 times [2022-11-19 08:01:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:01:26,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801346355] [2022-11-19 08:01:26,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:26,925 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 [2022-11-19 08:01:26,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:01:26,928 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:01:26,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:01:27,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:01:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:01:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:27,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:27,440 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 [2022-11-19 08:01:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:28,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:32,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:01:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801346355] [2022-11-19 08:01:32,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801346355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:32,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1440867592] [2022-11-19 08:01:32,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:32,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:01:32,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:01:32,411 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:01:32,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-19 08:01:33,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:01:33,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:33,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:01:33,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:33,586 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:33,587 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 [2022-11-19 08:01:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:33,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:34,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1440867592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436523216] [2022-11-19 08:01:34,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:01:34,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:01:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:01:34,432 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:01:34,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-19 08:01:36,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:01:36,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:01:36,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:01:36,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:01:36,396 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:01:36,396 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 [2022-11-19 08:01:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:36,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:01:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:01:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436523216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:01:37,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:01:37,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-19 08:01:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673768982] [2022-11-19 08:01:37,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:01:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:01:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:01:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:01:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:01:37,122 INFO L87 Difference]: Start difference. First operand 429 states and 1259 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:01:47,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:49,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:52,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:54,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:56,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:01:58,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:00,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:02,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:04,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:06,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:02:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:23,118 INFO L93 Difference]: Finished difference Result 2627 states and 8024 transitions. [2022-11-19 08:02:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:02:23,120 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-19 08:02:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:23,125 INFO L225 Difference]: With dead ends: 2627 [2022-11-19 08:02:23,125 INFO L226 Difference]: Without dead ends: 2627 [2022-11-19 08:02:23,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:02:23,125 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2016 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3044 mSolverCounterSat, 332 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2016 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 3044 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:23,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2016 Valid, 360 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 3044 Invalid, 10 Unknown, 0 Unchecked, 31.1s Time] [2022-11-19 08:02:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2627 states. [2022-11-19 08:02:23,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2627 to 441. [2022-11-19 08:02:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 434 states have (on average 2.956221198156682) internal successors, (1283), 440 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:23,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1283 transitions. [2022-11-19 08:02:23,149 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1283 transitions. Word has length 12 [2022-11-19 08:02:23,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:23,149 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 1283 transitions. [2022-11-19 08:02:23,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:23,150 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1283 transitions. [2022-11-19 08:02:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:02:23,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:23,150 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:23,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:23,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:23,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:23,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:23,756 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:02:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1860702673, now seen corresponding path program 1 times [2022-11-19 08:02:23,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:02:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2124724329] [2022-11-19 08:02:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:02:23,758 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:02:23,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:02:24,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:24,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:02:24,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:24,026 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 [2022-11-19 08:02:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:24,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:25,862 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2124724329] [2022-11-19 08:02:25,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2124724329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:25,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [18763030] [2022-11-19 08:02:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:25,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:02:25,864 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:02:25,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-19 08:02:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:02:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:26,363 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 [2022-11-19 08:02:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:26,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:28,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [18763030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:28,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134313537] [2022-11-19 08:02:28,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:02:28,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:02:28,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:02:28,374 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:02:28,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-19 08:02:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:02:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:02:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:28,662 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 [2022-11-19 08:02:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:29,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:02:29,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134313537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:29,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:02:29,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 08:02:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651165947] [2022-11-19 08:02:29,707 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:02:29,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:02:29,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:02:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:02:29,708 INFO L87 Difference]: Start difference. First operand 441 states and 1283 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 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) [2022-11-19 08:02:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:36,100 INFO L93 Difference]: Finished difference Result 465 states and 1330 transitions. [2022-11-19 08:02:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:02:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 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 13 [2022-11-19 08:02:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:36,102 INFO L225 Difference]: With dead ends: 465 [2022-11-19 08:02:36,102 INFO L226 Difference]: Without dead ends: 465 [2022-11-19 08:02:36,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:02:36,103 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 29 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:36,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 45 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-11-19 08:02:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-19 08:02:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 454. [2022-11-19 08:02:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 447 states have (on average 2.9351230425055927) internal successors, (1312), 453 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 1312 transitions. [2022-11-19 08:02:36,111 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 1312 transitions. Word has length 13 [2022-11-19 08:02:36,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:36,111 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 1312 transitions. [2022-11-19 08:02:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 16 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) [2022-11-19 08:02:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 1312 transitions. [2022-11-19 08:02:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:02:36,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:36,112 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:02:36,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:36,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:36,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:36,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:36,713 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:02:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:36,713 INFO L85 PathProgramCache]: Analyzing trace with hash -815327074, now seen corresponding path program 2 times [2022-11-19 08:02:36,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:02:36,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132297480] [2022-11-19 08:02:36,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:02:36,714 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 [2022-11-19 08:02:36,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:02:36,714 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:02:36,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-19 08:02:36,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:02:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:36,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:02:36,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:36,951 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 [2022-11-19 08:02:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:02:37,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:02:37,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:37,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132297480] [2022-11-19 08:02:37,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132297480] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:02:37,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:02:37,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:02:37,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967472803] [2022-11-19 08:02:37,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:02:37,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:02:37,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:02:37,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:02:37,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:02:37,131 INFO L87 Difference]: Start difference. First operand 454 states and 1312 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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) [2022-11-19 08:02:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:02:37,451 INFO L93 Difference]: Finished difference Result 390 states and 1110 transitions. [2022-11-19 08:02:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:02:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 14 [2022-11-19 08:02:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:02:37,453 INFO L225 Difference]: With dead ends: 390 [2022-11-19 08:02:37,453 INFO L226 Difference]: Without dead ends: 390 [2022-11-19 08:02:37,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:02:37,453 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:02:37,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:02:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-19 08:02:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 219. [2022-11-19 08:02:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 216 states have (on average 2.689814814814815) internal successors, (581), 218 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:02:37,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 581 transitions. [2022-11-19 08:02:37,457 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 581 transitions. Word has length 14 [2022-11-19 08:02:37,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:02:37,457 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 581 transitions. [2022-11-19 08:02:37,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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) [2022-11-19 08:02:37,457 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 581 transitions. [2022-11-19 08:02:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:02:37,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:02:37,458 INFO L195 NwaCegarLoop]: trace histogram [18, 1, 1, 1] [2022-11-19 08:02:37,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-19 08:02:37,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:37,659 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:02:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:02:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash -758567975, now seen corresponding path program 2 times [2022-11-19 08:02:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:02:37,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077265346] [2022-11-19 08:02:37,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:02:37,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:02:37,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:02:37,661 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:02:37,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:02:37,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:02:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:02:37,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:37,971 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 [2022-11-19 08:02:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:39,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:02:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:49,007 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:02:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077265346] [2022-11-19 08:02:49,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077265346] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:02:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338200871] [2022-11-19 08:02:49,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:02:49,008 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:49,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:02:49,010 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:02:49,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-19 08:02:49,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:02:49,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:02:49,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:02:49,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:02:49,801 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 [2022-11-19 08:02:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:02:50,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:08,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338200871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:08,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063323327] [2022-11-19 08:03:08,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:03:08,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:08,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:08,234 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:08,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-19 08:03:08,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:03:08,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:03:08,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 08:03:08,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:08,614 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 08:03:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:09,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:10,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063323327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:10,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:03:10,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20, 20, 20, 20] total 58 [2022-11-19 08:03:10,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129069996] [2022-11-19 08:03:10,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-19 08:03:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:10,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-19 08:03:10,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=2548, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:03:10,416 INFO L87 Difference]: Start difference. First operand 219 states and 581 transitions. Second operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:37,383 WARN L233 SmtUtils]: Spent 13.17s on a formula simplification that was a NOOP. DAG size: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:03:40,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:42,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:44,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:46,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:48,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:50,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:52,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:54,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:56,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:58,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:00,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:02,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:04,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:06,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:08,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:10,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:12,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:14,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:16,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:18,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:20,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:22,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:24,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:26,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:28,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:30,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:32,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:34,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:36,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:38,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:40,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:42,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:44,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:46,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:48,499 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 [] [2022-11-19 08:04:59,643 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification that was a NOOP. DAG size: 198 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:10,526 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 187 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:19,423 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 177 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:29,667 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:38,368 WARN L233 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 155 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:05:46,739 WARN L233 SmtUtils]: Spent 5.48s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:06:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:43,712 INFO L93 Difference]: Finished difference Result 5839 states and 17741 transitions. [2022-11-19 08:06:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 08:06:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 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 21 [2022-11-19 08:06:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:43,726 INFO L225 Difference]: With dead ends: 5839 [2022-11-19 08:06:43,726 INFO L226 Difference]: Without dead ends: 5839 [2022-11-19 08:06:43,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 124.2s TimeCoverageRelationStatistics Valid=1783, Invalid=4069, Unknown=0, NotChecked=0, Total=5852 [2022-11-19 08:06:43,727 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11868 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 8622 mSolverCounterSat, 860 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11868 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 9517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 8622 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:43,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11868 Valid, 1110 Invalid, 9517 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [860 Valid, 8622 Invalid, 35 Unknown, 0 Unchecked, 115.4s Time] [2022-11-19 08:06:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5839 states. [2022-11-19 08:06:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5839 to 259. [2022-11-19 08:06:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 256 states have (on average 2.50390625) internal successors, (641), 258 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 641 transitions. [2022-11-19 08:06:43,780 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 641 transitions. Word has length 21 [2022-11-19 08:06:43,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:43,780 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 641 transitions. [2022-11-19 08:06:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 641 transitions. [2022-11-19 08:06:43,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:06:43,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:43,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:06:43,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:44,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:44,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:06:44,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:44,393 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:06:44,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:44,394 INFO L85 PathProgramCache]: Analyzing trace with hash -15405878, now seen corresponding path program 1 times [2022-11-19 08:06:44,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:44,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [692264965] [2022-11-19 08:06:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:06:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:44,396 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:06:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:06:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:06:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:06:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:06:45,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:06:45,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:06:45,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [692264965] [2022-11-19 08:06:45,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [692264965] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:06:45,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:06:45,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:06:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046283864] [2022-11-19 08:06:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:06:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:06:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:06:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:06:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:06:45,064 INFO L87 Difference]: Start difference. First operand 259 states and 641 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:45,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:06:45,685 INFO L93 Difference]: Finished difference Result 382 states and 973 transitions. [2022-11-19 08:06:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:06:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2022-11-19 08:06:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:06:45,688 INFO L225 Difference]: With dead ends: 382 [2022-11-19 08:06:45,688 INFO L226 Difference]: Without dead ends: 367 [2022-11-19 08:06:45,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:06:45,689 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:06:45,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 14 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:06:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-19 08:06:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 325. [2022-11-19 08:06:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 322 states have (on average 2.5) internal successors, (805), 324 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:45,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 805 transitions. [2022-11-19 08:06:45,695 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 805 transitions. Word has length 24 [2022-11-19 08:06:45,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:06:45,695 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 805 transitions. [2022-11-19 08:06:45,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:06:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 805 transitions. [2022-11-19 08:06:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:06:45,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:06:45,698 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-19 08:06:45,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:06:45,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:06:45,911 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-19 08:06:45,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:06:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1261234797, now seen corresponding path program 4 times [2022-11-19 08:06:45,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:06:45,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076311136] [2022-11-19 08:06:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:06:45,927 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 [2022-11-19 08:06:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:06:45,928 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 08:06:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:06:46,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:06:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:06:46,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:06:46,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:06:46,432 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:06:46,433 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 [2022-11-19 08:06:48,900 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:06:48,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:06,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:07:06,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076311136] [2022-11-19 08:07:06,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076311136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:06,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1214158948] [2022-11-19 08:07:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:07:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:07:06,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:07:06,406 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:07:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-19 08:07:07,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:07:07,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 08:07:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:07,341 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:07:07,341 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 [2022-11-19 08:07:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:10,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:13,281 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:13,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1214158948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:13,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329414754] [2022-11-19 08:07:13,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:07:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:07:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:07:13,283 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:07:13,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02cb2152-e1a6-4dae-b26e-aa6301f73d79/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-19 08:07:13,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:07:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:07:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 08:07:13,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:07:13,898 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:07:13,899 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-19 08:07:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:14,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:07:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:07:16,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329414754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:07:16,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:07:16,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-11-19 08:07:16,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343704615] [2022-11-19 08:07:16,243 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:07:16,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-19 08:07:16,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:07:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-19 08:07:16,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 08:07:16,245 INFO L87 Difference]: Start difference. First operand 325 states and 805 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2022-11-19 08:08:04,975 WARN L233 SmtUtils]: Spent 20.74s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:30,543 WARN L233 SmtUtils]: Spent 21.65s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:08:32,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:34,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:36,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:38,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:40,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:42,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:44,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:46,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:48,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:50,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:52,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:54,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:56,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:08:58,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:00,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:02,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:04,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:06,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:08,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:10,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:09:12,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []