./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:33:55,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:33:55,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:33:55,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:33:55,594 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:33:55,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:33:55,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:33:55,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:33:55,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:33:55,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:33:55,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:33:55,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:33:55,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:33:55,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:33:55,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:33:55,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:33:55,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:33:55,630 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:33:55,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:33:55,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:33:55,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:33:55,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:33:55,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:33:55,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:33:55,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:33:55,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:33:55,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:33:55,647 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:33:55,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:33:55,648 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:33:55,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:33:55,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:33:55,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:33:55,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:33:55,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:33:55,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:33:55,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:33:55,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:33:55,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:33:55,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:33:55,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:33:55,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:33:55,702 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:33:55,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:33:55,703 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:33:55,703 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:33:55,704 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:33:55,704 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:33:55,705 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:33:55,705 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:33:55,705 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:33:55,705 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:33:55,706 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:33:55,707 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:33:55,707 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:33:55,707 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:33:55,707 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:33:55,707 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:33:55,708 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:33:55,708 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:33:55,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:33:55,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:33:55,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:33:55,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:33:55,711 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:33:55,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:33:55,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:33:55,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:33:55,712 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:33:55,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:33:55,712 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:33:55,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:33:55,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:33:55,717 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:33:55,718 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:33:55,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:33:55,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:33:55,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:33:55,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:33:55,719 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:33:55,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:33:55,719 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:33:55,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:33:55,720 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:33:55,720 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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-16 19:33:56,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:33:56,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:33:56,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:33:56,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:33:56,066 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:33:56,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 19:33:56,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/d8c9f73f7/ff77a51bae40485f9b5cb264539b5367/FLAG724eb974c [2022-11-16 19:33:56,706 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:33:56,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 19:33:56,714 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/d8c9f73f7/ff77a51bae40485f9b5cb264539b5367/FLAG724eb974c [2022-11-16 19:33:57,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/d8c9f73f7/ff77a51bae40485f9b5cb264539b5367 [2022-11-16 19:33:57,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:33:57,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:33:57,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:33:57,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:33:57,111 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:33:57,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:33:57" (1/1) ... [2022-11-16 19:33:57,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a85ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:57, skipping insertion in model container [2022-11-16 19:33:57,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:33:57" (1/1) ... [2022-11-16 19:33:57,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:33:57,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:33:57,330 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 19:33:57,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:33:57,346 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-16 19:33:57,347 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@e7d9ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:33:57, skipping insertion in model container [2022-11-16 19:33:57,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:33:57,347 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 19:33:57,349 INFO L158 Benchmark]: Toolchain (without parser) took 243.96ms. Allocated memory is still 90.2MB. Free memory was 65.8MB in the beginning and 66.1MB in the end (delta: -274.8kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 19:33:57,350 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 47.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 19:33:57,351 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.61ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 66.1MB in the end (delta: -470.4kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 19:33:57,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 90.2MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 47.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.61ms. Allocated memory is still 90.2MB. Free memory was 65.6MB in the beginning and 66.1MB in the end (delta: -470.4kB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 95]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 19:33:59,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:33:59,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:33:59,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:33:59,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:33:59,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:33:59,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:33:59,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:33:59,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:33:59,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:33:59,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:33:59,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:33:59,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:33:59,396 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:33:59,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:33:59,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:33:59,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:33:59,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:33:59,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:33:59,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:33:59,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:33:59,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:33:59,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:33:59,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:33:59,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:33:59,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:33:59,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:33:59,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:33:59,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:33:59,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:33:59,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:33:59,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:33:59,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:33:59,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:33:59,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:33:59,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:33:59,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:33:59,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:33:59,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:33:59,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:33:59,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:33:59,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-16 19:33:59,459 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:33:59,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:33:59,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:33:59,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:33:59,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:33:59,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:33:59,462 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:33:59,462 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:33:59,463 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:33:59,463 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:33:59,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:33:59,464 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:33:59,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:33:59,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:33:59,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:33:59,465 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:33:59,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:33:59,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:33:59,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:33:59,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:33:59,467 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:33:59,467 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:33:59,467 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:33:59,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:33:59,468 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:33:59,468 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 19:33:59,469 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 19:33:59,469 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:33:59,469 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:33:59,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:33:59,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 19:33:59,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:33:59,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:33:59,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:33:59,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:33:59,479 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-16 19:33:59,480 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 19:33:59,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:33:59,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 19:33:59,480 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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 610058eb9ed98833ba9b7a0798b4759bf36fe1b982d69af76f73ab299f075720 [2022-11-16 19:33:59,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:33:59,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:33:59,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:33:59,938 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:33:59,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:33:59,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 19:34:00,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/1941cc7fa/b3536458a5f64d63b6aab925cda0aa37/FLAG12353e497 [2022-11-16 19:34:00,473 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:34:00,474 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2022-11-16 19:34:00,482 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/1941cc7fa/b3536458a5f64d63b6aab925cda0aa37/FLAG12353e497 [2022-11-16 19:34:00,860 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/data/1941cc7fa/b3536458a5f64d63b6aab925cda0aa37 [2022-11-16 19:34:00,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:34:00,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:34:00,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:00,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:34:00,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:34:00,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:00" (1/1) ... [2022-11-16 19:34:00,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784f9bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:00, skipping insertion in model container [2022-11-16 19:34:00,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:34:00" (1/1) ... [2022-11-16 19:34:00,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:34:00,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:34:01,089 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 19:34:01,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:01,114 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 19:34:01,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:34:01,169 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 19:34:01,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:01,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:34:01,217 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2438,2451] [2022-11-16 19:34:01,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:34:01,237 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:34:01,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01 WrapperNode [2022-11-16 19:34:01,237 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:34:01,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:01,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:34:01,239 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:34:01,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,264 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,288 INFO L138 Inliner]: procedures = 26, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2022-11-16 19:34:01,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:34:01,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:34:01,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:34:01,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:34:01,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,305 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,305 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,321 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:34:01,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:34:01,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:34:01,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:34:01,327 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (1/1) ... [2022-11-16 19:34:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:34:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:01,358 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:34:01,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:34:01,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:34:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 19:34:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 19:34:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 19:34:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 19:34:01,403 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 19:34:01,403 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 19:34:01,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 19:34:01,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 19:34:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 19:34:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:34:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:34:01,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:34:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:34:01,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 19:34:01,407 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 19:34:01,615 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:34:01,618 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:34:02,123 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:34:02,320 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:34:02,320 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 19:34:02,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:02 BoogieIcfgContainer [2022-11-16 19:34:02,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:34:02,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:34:02,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:34:02,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:34:02,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:34:00" (1/3) ... [2022-11-16 19:34:02,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aae1c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:02, skipping insertion in model container [2022-11-16 19:34:02,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:34:01" (2/3) ... [2022-11-16 19:34:02,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aae1c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:34:02, skipping insertion in model container [2022-11-16 19:34:02,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:34:02" (3/3) ... [2022-11-16 19:34:02,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2022-11-16 19:34:02,368 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:34:02,368 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-16 19:34:02,368 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 19:34:02,456 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 19:34:02,517 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 19:34:02,531 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 286 flow [2022-11-16 19:34:02,534 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 286 flow [2022-11-16 19:34:02,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 286 flow [2022-11-16 19:34:02,592 INFO L130 PetriNetUnfolder]: 9/133 cut-off events. [2022-11-16 19:34:02,592 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 19:34:02,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 9/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2022-11-16 19:34:02,599 INFO L119 LiptonReduction]: Number of co-enabled transitions 660 [2022-11-16 19:34:21,336 INFO L134 LiptonReduction]: Checked pairs total: 901 [2022-11-16 19:34:21,336 INFO L136 LiptonReduction]: Total number of compositions: 152 [2022-11-16 19:34:21,345 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 82 flow [2022-11-16 19:34:21,365 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:21,383 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:34:21,389 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;@12f0c997, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:34:21,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2022-11-16 19:34:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:34:21,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:21,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:34:21,398 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:21,403 INFO L85 PathProgramCache]: Analyzing trace with hash 19021, now seen corresponding path program 1 times [2022-11-16 19:34:21,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:21,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834550605] [2022-11-16 19:34:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:21,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:21,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 19:34:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:21,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:34:21,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:21,679 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 19:34:21,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-16 19:34:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:21,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:21,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834550605] [2022-11-16 19:34:21,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834550605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:21,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:21,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:21,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607297022] [2022-11-16 19:34:21,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:21,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:21,793 INFO L87 Difference]: Start difference. First operand has 106 states, 62 states have (on average 4.048387096774194) internal successors, (251), 105 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:21,910 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2022-11-16 19:34:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:21,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:34:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:21,925 INFO L225 Difference]: With dead ends: 106 [2022-11-16 19:34:21,926 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 19:34:21,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:21,932 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:21,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-16 19:34:21,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 19:34:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 19:34:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 4.0476190476190474) internal successors, (255), 105 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 255 transitions. [2022-11-16 19:34:22,001 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 255 transitions. Word has length 2 [2022-11-16 19:34:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:22,002 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 255 transitions. [2022-11-16 19:34:22,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:22,005 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 255 transitions. [2022-11-16 19:34:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:34:22,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:22,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:34:22,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:22,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:22,227 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:22,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:22,227 INFO L85 PathProgramCache]: Analyzing trace with hash 19023, now seen corresponding path program 1 times [2022-11-16 19:34:22,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:22,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979246421] [2022-11-16 19:34:22,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:22,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:22,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:22,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 19:34:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:22,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:34:22,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:22,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:22,402 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:34:22,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-16 19:34:22,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 19:34:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:22,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:22,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:22,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979246421] [2022-11-16 19:34:22,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979246421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:22,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:22,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127717478] [2022-11-16 19:34:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:22,486 INFO L87 Difference]: Start difference. First operand 106 states and 255 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:22,614 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2022-11-16 19:34:22,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:34:22,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:22,616 INFO L225 Difference]: With dead ends: 106 [2022-11-16 19:34:22,616 INFO L226 Difference]: Without dead ends: 106 [2022-11-16 19:34:22,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:22,618 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:22,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-16 19:34:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-16 19:34:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-11-16 19:34:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 4.031746031746032) internal successors, (254), 105 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 254 transitions. [2022-11-16 19:34:22,632 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 254 transitions. Word has length 2 [2022-11-16 19:34:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:22,632 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 254 transitions. [2022-11-16 19:34:22,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 254 transitions. [2022-11-16 19:34:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:34:22,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:22,633 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:34:22,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:22,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:22,847 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:22,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:22,848 INFO L85 PathProgramCache]: Analyzing trace with hash 18903, now seen corresponding path program 1 times [2022-11-16 19:34:22,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:22,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764110610] [2022-11-16 19:34:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:22,849 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 [2022-11-16 19:34:22,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:22,851 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:22,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 19:34:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 19:34:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:22,955 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 19:34:22,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 19:34:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:22,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:22,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764110610] [2022-11-16 19:34:22,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764110610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:22,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:22,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:22,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897834156] [2022-11-16 19:34:22,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:22,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:22,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:22,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:22,971 INFO L87 Difference]: Start difference. First operand 106 states and 254 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:23,088 INFO L93 Difference]: Finished difference Result 105 states and 252 transitions. [2022-11-16 19:34:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:34:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:23,090 INFO L225 Difference]: With dead ends: 105 [2022-11-16 19:34:23,090 INFO L226 Difference]: Without dead ends: 105 [2022-11-16 19:34:23,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:23,092 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:23,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-16 19:34:23,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-16 19:34:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 4.0) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2022-11-16 19:34:23,100 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 2 [2022-11-16 19:34:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:23,101 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2022-11-16 19:34:23,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2022-11-16 19:34:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 19:34:23,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:23,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 19:34:23,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:23,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:23,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:23,313 INFO L85 PathProgramCache]: Analyzing trace with hash 18904, now seen corresponding path program 1 times [2022-11-16 19:34:23,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:23,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658616896] [2022-11-16 19:34:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:23,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:23,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:34:23,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:23,473 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:23,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:23,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:23,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:23,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658616896] [2022-11-16 19:34:23,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658616896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:23,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712208443] [2022-11-16 19:34:23,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:23,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:23,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:23,508 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:23,776 INFO L93 Difference]: Finished difference Result 204 states and 494 transitions. [2022-11-16 19:34:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 19:34:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:23,779 INFO L225 Difference]: With dead ends: 204 [2022-11-16 19:34:23,779 INFO L226 Difference]: Without dead ends: 204 [2022-11-16 19:34:23,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:23,780 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:23,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:34:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-16 19:34:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 105. [2022-11-16 19:34:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 3.984126984126984) internal successors, (251), 104 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 251 transitions. [2022-11-16 19:34:23,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 251 transitions. Word has length 2 [2022-11-16 19:34:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:23,798 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 251 transitions. [2022-11-16 19:34:23,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 251 transitions. [2022-11-16 19:34:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:34:23,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:23,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:34:23,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:24,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:24,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash 590351, now seen corresponding path program 1 times [2022-11-16 19:34:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:24,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [682935804] [2022-11-16 19:34:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:24,013 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:24,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:24,014 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:24,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:24,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:34:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:24,140 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2022-11-16 19:34:24,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 19:34:24,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:34:24,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:24,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:24,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [682935804] [2022-11-16 19:34:24,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [682935804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:24,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:24,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:24,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98149535] [2022-11-16 19:34:24,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:24,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:24,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:24,169 INFO L87 Difference]: Start difference. First operand 105 states and 251 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:24,317 INFO L93 Difference]: Finished difference Result 88 states and 202 transitions. [2022-11-16 19:34:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:24,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 19:34:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:24,318 INFO L225 Difference]: With dead ends: 88 [2022-11-16 19:34:24,319 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 19:34:24,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:24,320 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:24,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 19:34:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 19:34:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 56 states have (on average 3.607142857142857) internal successors, (202), 87 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 202 transitions. [2022-11-16 19:34:24,325 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 202 transitions. Word has length 3 [2022-11-16 19:34:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:24,326 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 202 transitions. [2022-11-16 19:34:24,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 202 transitions. [2022-11-16 19:34:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:34:24,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:24,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:34:24,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:24,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash 590353, now seen corresponding path program 1 times [2022-11-16 19:34:24,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284725573] [2022-11-16 19:34:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:24,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:24,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:24,541 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:24,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 19:34:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 19:34:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:24,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:24,686 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-16 19:34:24,687 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 12 treesize of output 24 [2022-11-16 19:34:24,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 19:34:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:24,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:24,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284725573] [2022-11-16 19:34:24,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284725573] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 19:34:24,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:34:24,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2022-11-16 19:34:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825197155] [2022-11-16 19:34:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:24,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:34:24,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:34:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:34:24,918 INFO L87 Difference]: Start difference. First operand 88 states and 202 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) [2022-11-16 19:34:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:25,051 INFO L93 Difference]: Finished difference Result 71 states and 153 transitions. [2022-11-16 19:34:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:25,051 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 [2022-11-16 19:34:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:25,052 INFO L225 Difference]: With dead ends: 71 [2022-11-16 19:34:25,052 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 19:34:25,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:34:25,053 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:25,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 19:34:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-16 19:34:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 3.122448979591837) internal successors, (153), 70 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 153 transitions. [2022-11-16 19:34:25,058 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 153 transitions. Word has length 3 [2022-11-16 19:34:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:25,058 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 153 transitions. [2022-11-16 19:34:25,058 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) [2022-11-16 19:34:25,058 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 153 transitions. [2022-11-16 19:34:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 19:34:25,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:25,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 19:34:25,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:25,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:25,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:25,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:25,268 INFO L85 PathProgramCache]: Analyzing trace with hash 590234, now seen corresponding path program 1 times [2022-11-16 19:34:25,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:25,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879500342] [2022-11-16 19:34:25,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:25,269 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:25,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:25,270 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 19:34:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:34:25,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:25,421 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:25,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:25,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:25,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879500342] [2022-11-16 19:34:25,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879500342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:25,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [245648146] [2022-11-16 19:34:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:25,764 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:25,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-16 19:34:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:25,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 19:34:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:25,974 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:26,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:26,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [245648146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:26,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864359712] [2022-11-16 19:34:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:26,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:26,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:26,097 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:26,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:34:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:26,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:34:26,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:26,258 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:26,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:26,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:26,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864359712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:26,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:34:26,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-16 19:34:26,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543226531] [2022-11-16 19:34:26,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:26,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 19:34:26,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 19:34:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:34:26,472 INFO L87 Difference]: Start difference. First operand 71 states and 153 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:27,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:27,539 INFO L93 Difference]: Finished difference Result 275 states and 600 transitions. [2022-11-16 19:34:27,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:34:27,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 19:34:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:27,542 INFO L225 Difference]: With dead ends: 275 [2022-11-16 19:34:27,542 INFO L226 Difference]: Without dead ends: 275 [2022-11-16 19:34:27,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:34:27,544 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:27,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 19:34:27,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-16 19:34:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 74. [2022-11-16 19:34:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 73 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:27,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 159 transitions. [2022-11-16 19:34:27,550 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 159 transitions. Word has length 3 [2022-11-16 19:34:27,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:27,551 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 159 transitions. [2022-11-16 19:34:27,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 159 transitions. [2022-11-16 19:34:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:34:27,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:27,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:34:27,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:27,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:27,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-16 19:34:28,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:28,155 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:28,155 INFO L85 PathProgramCache]: Analyzing trace with hash 18293371, now seen corresponding path program 1 times [2022-11-16 19:34:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:28,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643353554] [2022-11-16 19:34:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:28,156 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:28,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:28,157 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:28,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 19:34:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:28,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:34:28,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:28,276 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 19:34:28,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 19:34:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:28,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:28,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:28,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643353554] [2022-11-16 19:34:28,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643353554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:28,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:28,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:34:28,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072373975] [2022-11-16 19:34:28,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:28,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:34:28,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:28,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:34:28,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:34:28,299 INFO L87 Difference]: Start difference. First operand 74 states and 159 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:28,426 INFO L93 Difference]: Finished difference Result 52 states and 108 transitions. [2022-11-16 19:34:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:34:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 19:34:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:28,430 INFO L225 Difference]: With dead ends: 52 [2022-11-16 19:34:28,430 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 19:34:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:34:28,431 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 19:34:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 19:34:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 2.769230769230769) internal successors, (108), 51 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 108 transitions. [2022-11-16 19:34:28,441 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 108 transitions. Word has length 4 [2022-11-16 19:34:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:28,441 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 108 transitions. [2022-11-16 19:34:28,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 108 transitions. [2022-11-16 19:34:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:34:28,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:28,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:34:28,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:28,653 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 18293372, now seen corresponding path program 1 times [2022-11-16 19:34:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:28,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806654752] [2022-11-16 19:34:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:28,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:28,655 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:28,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:28,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:34:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:28,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:28,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:28,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806654752] [2022-11-16 19:34:28,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806654752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:28,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:28,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:34:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839476481] [2022-11-16 19:34:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:28,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:34:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:34:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:34:28,772 INFO L87 Difference]: Start difference. First operand 52 states and 108 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:28,995 INFO L93 Difference]: Finished difference Result 79 states and 147 transitions. [2022-11-16 19:34:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:34:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 19:34:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:28,996 INFO L225 Difference]: With dead ends: 79 [2022-11-16 19:34:28,996 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 19:34:28,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:34:28,997 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:28,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:34:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 19:34:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-11-16 19:34:29,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 56 states have (on average 2.5) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2022-11-16 19:34:29,001 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 4 [2022-11-16 19:34:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:29,002 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2022-11-16 19:34:29,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2022-11-16 19:34:29,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:34:29,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:29,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:34:29,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:29,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:29,214 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:29,214 INFO L85 PathProgramCache]: Analyzing trace with hash 18293406, now seen corresponding path program 1 times [2022-11-16 19:34:29,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:29,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742509203] [2022-11-16 19:34:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:29,215 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:29,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:29,216 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:29,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:34:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:29,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:34:29,348 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 19:34:29,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 19:34:29,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:34:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:29,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:29,390 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:29,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742509203] [2022-11-16 19:34:29,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742509203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:29,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:29,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080083724] [2022-11-16 19:34:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:29,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:29,391 INFO L87 Difference]: Start difference. First operand 69 states and 140 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) [2022-11-16 19:34:29,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:29,503 INFO L93 Difference]: Finished difference Result 61 states and 123 transitions. [2022-11-16 19:34:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:29,504 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 [2022-11-16 19:34:29,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:29,505 INFO L225 Difference]: With dead ends: 61 [2022-11-16 19:34:29,505 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 19:34:29,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:29,506 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:29,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 19:34:29,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-16 19:34:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2022-11-16 19:34:29,509 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 4 [2022-11-16 19:34:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2022-11-16 19:34:29,509 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) [2022-11-16 19:34:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2022-11-16 19:34:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:34:29,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:29,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:34:29,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:29,719 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:29,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 18293408, now seen corresponding path program 1 times [2022-11-16 19:34:29,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:29,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900977296] [2022-11-16 19:34:29,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:29,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:29,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:29,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 19:34:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:29,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 19:34:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:29,820 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 19:34:29,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-16 19:34:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:29,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:29,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900977296] [2022-11-16 19:34:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900977296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:29,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:29,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:29,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767786172] [2022-11-16 19:34:29,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:29,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:29,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:29,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:29,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:29,848 INFO L87 Difference]: Start difference. First operand 61 states and 123 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) [2022-11-16 19:34:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:29,927 INFO L93 Difference]: Finished difference Result 53 states and 106 transitions. [2022-11-16 19:34:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:29,928 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 [2022-11-16 19:34:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:29,928 INFO L225 Difference]: With dead ends: 53 [2022-11-16 19:34:29,928 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 19:34:29,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:29,929 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:29,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 19:34:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-16 19:34:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 52 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 106 transitions. [2022-11-16 19:34:29,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 106 transitions. Word has length 4 [2022-11-16 19:34:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:29,933 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 106 transitions. [2022-11-16 19:34:29,933 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) [2022-11-16 19:34:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 106 transitions. [2022-11-16 19:34:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:34:29,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:29,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:34:29,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:30,145 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 567341502, now seen corresponding path program 1 times [2022-11-16 19:34:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:30,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605764324] [2022-11-16 19:34:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:30,146 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:30,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:30,147 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:30,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 19:34:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:30,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:34:30,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:30,301 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:30,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:30,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:31,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605764324] [2022-11-16 19:34:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605764324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913939209] [2022-11-16 19:34:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:31,255 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:31,256 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:31,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-16 19:34:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:31,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:31,466 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:31,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:31,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:31,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913939209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:31,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442474245] [2022-11-16 19:34:31,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:31,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:31,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:31,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:31,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:34:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:31,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:31,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:32,047 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:32,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:32,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:32,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442474245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:32,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:34:32,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-16 19:34:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143113477] [2022-11-16 19:34:32,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:34:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:34:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:34:32,359 INFO L87 Difference]: Start difference. First operand 53 states and 106 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:33,427 INFO L93 Difference]: Finished difference Result 57 states and 114 transitions. [2022-11-16 19:34:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:34:33,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 19:34:33,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:33,428 INFO L225 Difference]: With dead ends: 57 [2022-11-16 19:34:33,428 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 19:34:33,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:34:33,429 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:33,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-16 19:34:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 19:34:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-16 19:34:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 2.1923076923076925) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 114 transitions. [2022-11-16 19:34:33,432 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 114 transitions. Word has length 5 [2022-11-16 19:34:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:33,433 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 114 transitions. [2022-11-16 19:34:33,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 114 transitions. [2022-11-16 19:34:33,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:34:33,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:33,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:34:33,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:33,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:33,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:34,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:34,039 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:34,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:34,040 INFO L85 PathProgramCache]: Analyzing trace with hash 407718952, now seen corresponding path program 1 times [2022-11-16 19:34:34,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:34,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712127800] [2022-11-16 19:34:34,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:34,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:34,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:34,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:34,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-16 19:34:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:34,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:34:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:34,220 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:34,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:35,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:35,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712127800] [2022-11-16 19:34:35,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712127800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:35,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431287302] [2022-11-16 19:34:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:35,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:35,504 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:35,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-16 19:34:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:35,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:35,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:35,753 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:35,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:35,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:36,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431287302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:36,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796228899] [2022-11-16 19:34:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:36,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:36,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:36,174 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:36,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 19:34:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:36,353 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:36,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:36,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796228899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:36,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:34:36,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-16 19:34:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133255171] [2022-11-16 19:34:36,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:36,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:34:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:36,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:34:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:34:36,748 INFO L87 Difference]: Start difference. First operand 57 states and 114 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:37,537 INFO L93 Difference]: Finished difference Result 60 states and 123 transitions. [2022-11-16 19:34:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:34:37,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:34:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:37,538 INFO L225 Difference]: With dead ends: 60 [2022-11-16 19:34:37,538 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:34:37,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:34:37,539 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:37,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-11-16 19:34:37,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:34:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-11-16 19:34:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 2.215686274509804) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:37,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2022-11-16 19:34:37,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 6 [2022-11-16 19:34:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:37,543 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2022-11-16 19:34:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2022-11-16 19:34:37,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:34:37,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:37,544 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 19:34:37,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:37,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:37,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:38,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:38,147 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:38,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 407972440, now seen corresponding path program 2 times [2022-11-16 19:34:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744311641] [2022-11-16 19:34:38,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:34:38,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:38,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:38,149 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:38,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 19:34:38,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:34:38,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:38,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:34:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:38,300 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:38,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:38,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:39,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744311641] [2022-11-16 19:34:39,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744311641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:39,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1170515252] [2022-11-16 19:34:39,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:34:39,102 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:39,103 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:39,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-16 19:34:39,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:34:39,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:34:39,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:39,399 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:39,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:39,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:40,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1170515252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:40,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067059912] [2022-11-16 19:34:40,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:34:40,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:40,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:40,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:40,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 19:34:40,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:34:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:34:40,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:40,691 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:40,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:40,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:40,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067059912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:40,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:34:40,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-16 19:34:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778765888] [2022-11-16 19:34:40,968 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:40,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 19:34:40,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:40,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 19:34:40,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:34:40,969 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:44,631 INFO L93 Difference]: Finished difference Result 325 states and 691 transitions. [2022-11-16 19:34:44,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:34:44,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:34:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:44,634 INFO L225 Difference]: With dead ends: 325 [2022-11-16 19:34:44,634 INFO L226 Difference]: Without dead ends: 325 [2022-11-16 19:34:44,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:34:44,635 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 561 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:44,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 0 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-16 19:34:44,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-16 19:34:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 62. [2022-11-16 19:34:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 2.192982456140351) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:44,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2022-11-16 19:34:44,641 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 6 [2022-11-16 19:34:44,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:44,641 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2022-11-16 19:34:44,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2022-11-16 19:34:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:34:44,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:44,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:44,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:44,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-16 19:34:45,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:45,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:45,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:45,250 INFO L85 PathProgramCache]: Analyzing trace with hash -245616367, now seen corresponding path program 1 times [2022-11-16 19:34:45,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534120738] [2022-11-16 19:34:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:45,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:45,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:45,252 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:45,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 19:34:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:34:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:45,420 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:45,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:45,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:46,343 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:46,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534120738] [2022-11-16 19:34:46,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534120738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:46,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [145716113] [2022-11-16 19:34:46,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:46,343 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:46,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:46,344 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:46,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-16 19:34:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:46,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:46,582 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:46,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:46,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:47,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [145716113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:47,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662235002] [2022-11-16 19:34:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:47,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:47,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:47,073 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:47,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 19:34:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:47,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:34:47,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:47,239 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:47,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:47,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:47,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662235002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:47,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:34:47,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-16 19:34:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76852133] [2022-11-16 19:34:47,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:34:47,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:34:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:34:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 19:34:47,702 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:48,620 INFO L93 Difference]: Finished difference Result 68 states and 146 transitions. [2022-11-16 19:34:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 19:34:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 19:34:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:48,621 INFO L225 Difference]: With dead ends: 68 [2022-11-16 19:34:48,621 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:34:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:34:48,622 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:48,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-11-16 19:34:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:34:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-16 19:34:48,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 2.3174603174603177) internal successors, (146), 67 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 146 transitions. [2022-11-16 19:34:48,626 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 146 transitions. Word has length 7 [2022-11-16 19:34:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:48,627 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 146 transitions. [2022-11-16 19:34:48,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 146 transitions. [2022-11-16 19:34:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 19:34:48,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:48,628 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-16 19:34:48,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:48,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-16 19:34:49,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-16 19:34:49,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:49,232 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:49,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -237760130, now seen corresponding path program 2 times [2022-11-16 19:34:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:49,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592211854] [2022-11-16 19:34:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:34:49,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:49,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:49,233 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:49,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 19:34:49,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 19:34:49,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:34:49,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:49,393 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:49,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 19:34:49,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:49,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:49,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592211854] [2022-11-16 19:34:49,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592211854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:49,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:49,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:34:49,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569566113] [2022-11-16 19:34:49,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:49,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:34:49,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:49,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:34:49,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:34:49,483 INFO L87 Difference]: Start difference. First operand 68 states and 146 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) [2022-11-16 19:34:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:49,623 INFO L93 Difference]: Finished difference Result 53 states and 109 transitions. [2022-11-16 19:34:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:34:49,624 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 7 [2022-11-16 19:34:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:49,624 INFO L225 Difference]: With dead ends: 53 [2022-11-16 19:34:49,624 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 19:34:49,625 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 [2022-11-16 19:34:49,625 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:49,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 19:34:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2022-11-16 19:34:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-11-16 19:34:49,628 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 7 [2022-11-16 19:34:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:49,629 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-11-16 19:34:49,629 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) [2022-11-16 19:34:49,629 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-11-16 19:34:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:34:49,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:49,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:34:49,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:49,839 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash -278156778, now seen corresponding path program 1 times [2022-11-16 19:34:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:49,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100940310] [2022-11-16 19:34:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:34:49,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:49,841 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:49,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 19:34:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:34:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:34:49,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:49,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:34:49,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:49,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100940310] [2022-11-16 19:34:49,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100940310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:34:49,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:34:49,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 19:34:49,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199834781] [2022-11-16 19:34:49,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:34:49,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:34:49,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:34:49,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:34:49,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:49,977 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:34:50,067 INFO L93 Difference]: Finished difference Result 58 states and 114 transitions. [2022-11-16 19:34:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:34:50,068 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:34:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:34:50,069 INFO L225 Difference]: With dead ends: 58 [2022-11-16 19:34:50,069 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 19:34:50,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:34:50,069 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:34:50,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:34:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 19:34:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 19:34:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 2.111111111111111) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 76 transitions. [2022-11-16 19:34:50,072 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 76 transitions. Word has length 12 [2022-11-16 19:34:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:34:50,073 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 76 transitions. [2022-11-16 19:34:50,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:34:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 76 transitions. [2022-11-16 19:34:50,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 19:34:50,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:34:50,074 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-16 19:34:50,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 19:34:50,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:50,283 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:34:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:34:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash -872905960, now seen corresponding path program 3 times [2022-11-16 19:34:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:34:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157829845] [2022-11-16 19:34:50,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:34:50,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:34:50,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:34:50,286 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:34:50,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:34:50,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:34:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:50,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 19:34:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:50,572 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:50,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:51,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:54,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:34:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157829845] [2022-11-16 19:34:54,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157829845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:54,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135179128] [2022-11-16 19:34:54,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:34:54,408 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:34:54,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:34:54,410 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:34:54,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-16 19:34:55,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:34:55,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:34:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:34:55,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:34:55,214 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:34:55,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:34:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:55,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:34:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:34:58,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135179128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:34:58,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638161213] [2022-11-16 19:34:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:34:58,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:34:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:34:58,913 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:34:58,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 19:35:01,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 19:35:01,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:01,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:35:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:01,397 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:35:01,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:35:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:01,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638161213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:01,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:01,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-16 19:35:01,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458907040] [2022-11-16 19:35:01,962 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:01,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 19:35:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 19:35:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 19:35:01,964 INFO L87 Difference]: Start difference. First operand 38 states and 76 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:21,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:21,876 INFO L93 Difference]: Finished difference Result 550 states and 1160 transitions. [2022-11-16 19:35:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:35:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 19:35:21,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:21,880 INFO L225 Difference]: With dead ends: 550 [2022-11-16 19:35:21,880 INFO L226 Difference]: Without dead ends: 550 [2022-11-16 19:35:21,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 19:35:21,881 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2496 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2496 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:21,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2496 Valid, 0 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-16 19:35:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-11-16 19:35:21,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 50. [2022-11-16 19:35:21,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 49 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 100 transitions. [2022-11-16 19:35:21,888 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 100 transitions. Word has length 12 [2022-11-16 19:35:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:21,888 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 100 transitions. [2022-11-16 19:35:21,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 100 transitions. [2022-11-16 19:35:21,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 19:35:21,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:21,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:21,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:35:22,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-11-16 19:35:22,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-16 19:35:22,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:22,502 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:35:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -167923561, now seen corresponding path program 1 times [2022-11-16 19:35:22,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713803195] [2022-11-16 19:35:22,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:22,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:22,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:22,504 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:22,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 19:35:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:35:22,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:22,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:35:22,661 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:22,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713803195] [2022-11-16 19:35:22,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713803195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:35:22,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:35:22,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:35:22,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348663883] [2022-11-16 19:35:22,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:35:22,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:35:22,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:35:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:22,662 INFO L87 Difference]: Start difference. First operand 50 states and 100 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:22,762 INFO L93 Difference]: Finished difference Result 60 states and 116 transitions. [2022-11-16 19:35:22,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:35:22,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 19:35:22,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:22,763 INFO L225 Difference]: With dead ends: 60 [2022-11-16 19:35:22,763 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 19:35:22,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:35:22,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:22,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:35:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 19:35:22,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-16 19:35:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-11-16 19:35:22,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 14 [2022-11-16 19:35:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:22,768 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-11-16 19:35:22,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-11-16 19:35:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:35:22,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:22,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:22,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 19:35:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:22,981 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:35:22,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash -31352952, now seen corresponding path program 1 times [2022-11-16 19:35:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:22,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328728411] [2022-11-16 19:35:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:22,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:22,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:22,983 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:22,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:35:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:35:23,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:23,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:35:23,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:23,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:23,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:35:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:23,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:23,517 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_823 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_823) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:35:23,717 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:23,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:35:23,725 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:23,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:35:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 19:35:23,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328728411] [2022-11-16 19:35:23,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328728411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:23,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207460213] [2022-11-16 19:35:23,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:23,981 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:23,983 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:23,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-16 19:35:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:24,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 19:35:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:24,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:24,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 19:35:24,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:35:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:24,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:25,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:35:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:25,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:25,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 165 [2022-11-16 19:35:42,323 WARN L233 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:35:42,324 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:42,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 182 treesize of output 160 [2022-11-16 19:35:42,478 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-16 19:35:42,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 51 [2022-11-16 19:35:42,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:42,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 201 treesize of output 109 [2022-11-16 19:35:42,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:42,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 57 [2022-11-16 19:35:42,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:42,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 10 [2022-11-16 19:35:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:42,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207460213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:42,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939854223] [2022-11-16 19:35:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:35:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:42,821 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:42,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-16 19:35:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:35:42,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:35:42,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:42,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 19:35:43,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:43,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:43,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:35:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:43,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:44,245 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:44,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:35:44,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:44,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:35:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:45,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939854223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:45,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:45,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 27 [2022-11-16 19:35:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661279969] [2022-11-16 19:35:45,024 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 19:35:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 19:35:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=630, Unknown=1, NotChecked=52, Total=812 [2022-11-16 19:35:45,025 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:45,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:45,907 INFO L93 Difference]: Finished difference Result 87 states and 179 transitions. [2022-11-16 19:35:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:35:45,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:35:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:45,909 INFO L225 Difference]: With dead ends: 87 [2022-11-16 19:35:45,909 INFO L226 Difference]: Without dead ends: 85 [2022-11-16 19:35:45,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=164, Invalid=769, Unknown=1, NotChecked=58, Total=992 [2022-11-16 19:35:45,910 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:45,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-16 19:35:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-16 19:35:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-11-16 19:35:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 2.017543859649123) internal successors, (115), 58 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 115 transitions. [2022-11-16 19:35:45,914 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 115 transitions. Word has length 15 [2022-11-16 19:35:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:45,915 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 115 transitions. [2022-11-16 19:35:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 115 transitions. [2022-11-16 19:35:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:35:45,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:45,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:45,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-16 19:35:46,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 [2022-11-16 19:35:46,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-16 19:35:46,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:46,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:35:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash 4396248, now seen corresponding path program 2 times [2022-11-16 19:35:46,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:46,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959887710] [2022-11-16 19:35:46,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:46,520 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:46,521 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:46,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 19:35:46,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:46,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:35:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:46,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:35:46,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:46,896 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:46,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:35:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:46,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:47,021 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_910 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_910) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:35:47,194 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:47,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:35:47,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:47,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:35:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 19:35:47,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:47,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959887710] [2022-11-16 19:35:47,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959887710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:47,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887326477] [2022-11-16 19:35:47,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:47,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:47,411 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:47,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-16 19:35:47,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:35:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:47,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:35:47,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:35:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:48,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:48,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:35:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:48,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:48,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_941 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_941) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:35:49,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:49,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 414 treesize of output 177 [2022-11-16 19:35:49,800 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:49,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 252 [2022-11-16 19:35:49,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 93 [2022-11-16 19:35:50,050 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:50,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 111 [2022-11-16 19:35:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 19:35:52,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887326477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7570267] [2022-11-16 19:35:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:35:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:35:52,667 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:35:52,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-16 19:35:52,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:35:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:52,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:35:52,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:52,847 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 26 treesize of output 24 [2022-11-16 19:35:53,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:53,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:53,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:35:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:53,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:54,455 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:54,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:35:54,698 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:54,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:35:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:55,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7570267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:55,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:35:55,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 28 [2022-11-16 19:35:55,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770362460] [2022-11-16 19:35:55,346 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:35:55,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 19:35:55,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:35:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 19:35:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=629, Unknown=3, NotChecked=106, Total=870 [2022-11-16 19:35:55,351 INFO L87 Difference]: Start difference. First operand 59 states and 115 transitions. Second operand has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:35:56,309 INFO L93 Difference]: Finished difference Result 94 states and 193 transitions. [2022-11-16 19:35:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:35:56,311 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:35:56,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:35:56,311 INFO L225 Difference]: With dead ends: 94 [2022-11-16 19:35:56,311 INFO L226 Difference]: Without dead ends: 91 [2022-11-16 19:35:56,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=167, Invalid=768, Unknown=3, NotChecked=118, Total=1056 [2022-11-16 19:35:56,313 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:35:56,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 55 Unchecked, 0.3s Time] [2022-11-16 19:35:56,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-16 19:35:56,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2022-11-16 19:35:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 2.014925373134328) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:56,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2022-11-16 19:35:56,318 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2022-11-16 19:35:56,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:35:56,318 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2022-11-16 19:35:56,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.310344827586207) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:35:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2022-11-16 19:35:56,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:35:56,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:35:56,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:35:56,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-16 19:35:56,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-16 19:35:56,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-16 19:35:56,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:35:56,924 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:35:56,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:35:56,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1434094648, now seen corresponding path program 3 times [2022-11-16 19:35:56,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:35:56,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023698908] [2022-11-16 19:35:56,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:56,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:35:56,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:35:56,927 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:35:56,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 19:35:57,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:35:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:57,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:35:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:57,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:35:57,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:57,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:57,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:35:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:35:57,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:35:57,545 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_997 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_997) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:35:57,790 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:35:57,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:35:57,987 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:35:57,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:35:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 19:35:58,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:35:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023698908] [2022-11-16 19:35:58,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023698908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:35:58,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1379068572] [2022-11-16 19:35:58,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:35:58,096 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:35:58,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:35:58,097 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:35:58,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-16 19:35:58,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:35:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:35:58,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:35:58,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:35:58,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:58,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:58,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:58,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 19:35:58,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:35:59,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:35:59,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:35:59,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:35:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:35:59,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:00,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:00,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 402 treesize of output 165 [2022-11-16 19:36:16,704 WARN L233 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:36:16,705 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:16,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 182 treesize of output 160 [2022-11-16 19:36:16,851 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-16 19:36:16,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 98 treesize of output 51 [2022-11-16 19:36:16,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:16,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 201 treesize of output 109 [2022-11-16 19:36:16,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:16,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 57 [2022-11-16 19:36:16,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:16,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 10 [2022-11-16 19:36:17,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:17,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1379068572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:17,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675848713] [2022-11-16 19:36:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:36:17,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:17,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:17,168 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:17,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-16 19:36:17,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:36:17,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:36:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:17,385 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 26 treesize of output 24 [2022-11-16 19:36:17,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:18,099 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:18,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:18,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:18,748 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:18,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:36:18,762 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:18,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:36:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675848713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:19,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:36:19,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 27 [2022-11-16 19:36:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440438784] [2022-11-16 19:36:19,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 19:36:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:36:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 19:36:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=629, Unknown=1, NotChecked=52, Total=812 [2022-11-16 19:36:19,523 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:20,416 INFO L93 Difference]: Finished difference Result 92 states and 190 transitions. [2022-11-16 19:36:20,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 19:36:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:36:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:20,419 INFO L225 Difference]: With dead ends: 92 [2022-11-16 19:36:20,419 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 19:36:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=163, Invalid=770, Unknown=1, NotChecked=58, Total=992 [2022-11-16 19:36:20,420 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:20,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-11-16 19:36:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 19:36:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2022-11-16 19:36:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 2.014925373134328) internal successors, (135), 68 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2022-11-16 19:36:20,428 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2022-11-16 19:36:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2022-11-16 19:36:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2022-11-16 19:36:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:36:20,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:20,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:20,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:20,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-16 19:36:20,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-16 19:36:21,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:21,036 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:36:21,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:21,036 INFO L85 PathProgramCache]: Analyzing trace with hash -162014252, now seen corresponding path program 4 times [2022-11-16 19:36:21,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:36:21,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520952432] [2022-11-16 19:36:21,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:36:21,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:21,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:36:21,038 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:36:21,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 19:36:21,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:36:21,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:21,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 19:36:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:21,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:36:21,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:21,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:36:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:36:21,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:21,823 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:21,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 73 [2022-11-16 19:36:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:36:22,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:36:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520952432] [2022-11-16 19:36:22,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520952432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1015130111] [2022-11-16 19:36:22,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:36:22,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:36:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:36:22,079 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:36:22,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-16 19:36:22,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:36:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 19:36:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:22,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:22,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 35 [2022-11-16 19:36:22,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:36:23,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:23,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:23,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:23,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:23,366 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1115 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1115) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))))) is different from false [2022-11-16 19:36:23,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:23,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 414 treesize of output 177 [2022-11-16 19:36:24,359 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:24,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 252 [2022-11-16 19:36:24,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 93 [2022-11-16 19:36:24,654 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 111 [2022-11-16 19:36:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 19:36:29,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1015130111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772804057] [2022-11-16 19:36:29,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:36:29,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:29,158 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:29,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-16 19:36:29,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:36:29,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:29,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:36:29,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:29,321 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 26 treesize of output 24 [2022-11-16 19:36:29,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:29,984 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:29,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:30,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:30,636 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:30,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:36:30,652 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:30,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:36:31,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:31,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772804057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:31,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:36:31,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 27 [2022-11-16 19:36:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146365975] [2022-11-16 19:36:31,453 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 19:36:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:36:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 19:36:31,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=630, Unknown=1, NotChecked=52, Total=812 [2022-11-16 19:36:31,455 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:31,895 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse6 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse1 (bvadd c_~queue~0.offset (_ bv3 32) .cse6)) (.cse2 (bvadd c_~queue~0.offset (_ bv2 32) .cse6)) (.cse3 (bvadd c_~queue~0.offset .cse6 (_ bv1 32))) (.cse4 (bvadd c_~queue~0.offset .cse6))) (and (forall ((v_ArrVal_1115 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1115) c_~queue~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 .cse4))))) (or (not (bvslt c_~front~0 c_~n~0)) (forall ((v_ArrVal_1142 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1142) c_~queue~0.base))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 .cse4))) (_ bv5 32))) (not (bvsge c_~front~0 (_ bv0 32))))))) is different from false [2022-11-16 19:36:32,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:32,474 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2022-11-16 19:36:32,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:36:32,475 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:36:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:32,477 INFO L225 Difference]: With dead ends: 96 [2022-11-16 19:36:32,477 INFO L226 Difference]: Without dead ends: 91 [2022-11-16 19:36:32,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=772, Unknown=2, NotChecked=118, Total=1056 [2022-11-16 19:36:32,479 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:32,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-11-16 19:36:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-16 19:36:32,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2022-11-16 19:36:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 2.013888888888889) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2022-11-16 19:36:32,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 15 [2022-11-16 19:36:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:32,484 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2022-11-16 19:36:32,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2022-11-16 19:36:32,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:36:32,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:32,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:32,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-16 19:36:32,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-16 19:36:32,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 19:36:33,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:33,090 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:36:33,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:33,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2112192032, now seen corresponding path program 5 times [2022-11-16 19:36:33,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:36:33,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124893681] [2022-11-16 19:36:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:36:33,091 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:33,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:36:33,092 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:36:33,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 19:36:33,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:36:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:33,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 19:36:33,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:33,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:36:33,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:33,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:33,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:34,581 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:34,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:36:34,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:34,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:36:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:35,309 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:36:35,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124893681] [2022-11-16 19:36:35,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124893681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:35,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1348665416] [2022-11-16 19:36:35,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:36:35,309 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:36:35,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:36:35,310 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:36:35,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-16 19:36:35,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:36:35,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:35,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:36:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:35,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:36:36,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:36:36,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:36,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:36,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:36:36,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:36:36,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:36,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:47,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:47,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 414 treesize of output 177 [2022-11-16 19:36:47,485 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:47,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 252 [2022-11-16 19:36:47,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 93 [2022-11-16 19:36:47,787 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:47,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 117 treesize of output 111 [2022-11-16 19:36:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:52,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1348665416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:52,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870266080] [2022-11-16 19:36:52,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:36:52,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:52,433 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:52,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-16 19:36:52,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:36:52,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:52,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:36:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:52,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:36:52,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:53,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:53,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:53,588 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:53,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:36:53,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:53,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:36:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:54,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870266080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:54,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:36:54,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 26 [2022-11-16 19:36:54,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209431315] [2022-11-16 19:36:54,096 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:54,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 19:36:54,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:36:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 19:36:54,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=631, Unknown=10, NotChecked=0, Total=756 [2022-11-16 19:36:54,098 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2022-11-16 19:36:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:36:54,871 INFO L93 Difference]: Finished difference Result 119 states and 241 transitions. [2022-11-16 19:36:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 19:36:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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 15 [2022-11-16 19:36:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:36:54,873 INFO L225 Difference]: With dead ends: 119 [2022-11-16 19:36:54,873 INFO L226 Difference]: Without dead ends: 114 [2022-11-16 19:36:54,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=163, Invalid=882, Unknown=11, NotChecked=0, Total=1056 [2022-11-16 19:36:54,874 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:36:54,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-11-16 19:36:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-16 19:36:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2022-11-16 19:36:54,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:36:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 164 transitions. [2022-11-16 19:36:54,878 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 164 transitions. Word has length 15 [2022-11-16 19:36:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:36:54,879 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 164 transitions. [2022-11-16 19:36:54,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2022-11-16 19:36:54,879 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 164 transitions. [2022-11-16 19:36:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:36:54,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:36:54,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:36:54,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 19:36:55,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-11-16 19:36:55,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-16 19:36:55,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:55,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:36:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:36:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 790393066, now seen corresponding path program 6 times [2022-11-16 19:36:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:36:55,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927153548] [2022-11-16 19:36:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:36:55,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:36:55,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:36:55,495 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:36:55,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 19:36:55,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 19:36:55,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:55,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:36:55,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:55,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 19:36:55,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:55,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:55,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:36:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:36:55,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:56,225 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:56,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 73 [2022-11-16 19:36:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:36:56,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:36:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927153548] [2022-11-16 19:36:56,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927153548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014563541] [2022-11-16 19:36:56,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:36:56,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:36:56,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:36:56,451 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:36:56,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-16 19:36:56,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:36:56,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354151009] [2022-11-16 19:36:56,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:36:56,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:36:56,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:36:56,741 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:36:56,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 1 [2022-11-16 19:36:56,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-16 19:36:56,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 19:36:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:36:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:36:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:36:56,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 19:36:57,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2022-11-16 19:36:57,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:57,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:36:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:57,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:36:58,085 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:36:58,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 113 [2022-11-16 19:36:58,316 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:36:58,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 9 [2022-11-16 19:36:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:36:58,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354151009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:36:58,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 19:36:58,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6] total 18 [2022-11-16 19:36:58,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785015116] [2022-11-16 19:36:58,749 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 19:36:58,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 19:36:58,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:36:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 19:36:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:36:58,750 INFO L87 Difference]: Start difference. First operand 81 states and 164 transitions. Second operand has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:02,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:37:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:02,974 INFO L93 Difference]: Finished difference Result 161 states and 333 transitions. [2022-11-16 19:37:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:37:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:37:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:02,976 INFO L225 Difference]: With dead ends: 161 [2022-11-16 19:37:02,976 INFO L226 Difference]: Without dead ends: 140 [2022-11-16 19:37:02,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2022-11-16 19:37:02,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:02,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 210 Invalid, 1 Unknown, 59 Unchecked, 2.8s Time] [2022-11-16 19:37:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-16 19:37:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 71. [2022-11-16 19:37:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 2.1594202898550723) internal successors, (149), 70 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 149 transitions. [2022-11-16 19:37:02,981 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 149 transitions. Word has length 15 [2022-11-16 19:37:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:02,981 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 149 transitions. [2022-11-16 19:37:02,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 149 transitions. [2022-11-16 19:37:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:37:02,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:02,982 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:02,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:03,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:03,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:03,390 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:37:03,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:03,391 INFO L85 PathProgramCache]: Analyzing trace with hash -972600851, now seen corresponding path program 7 times [2022-11-16 19:37:03,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:37:03,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501868761] [2022-11-16 19:37:03,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:37:03,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:03,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:37:03,392 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:37:03,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 19:37:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:37:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:03,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:04,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:37:04,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501868761] [2022-11-16 19:37:04,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501868761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:04,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1665671237] [2022-11-16 19:37:04,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:37:04,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:37:04,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:37:04,306 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:37:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-16 19:37:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:04,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 19:37:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:04,668 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:37:04,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:37:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:05,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:06,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1665671237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:06,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928479282] [2022-11-16 19:37:06,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:37:06,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:06,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:06,002 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:06,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-16 19:37:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:37:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:37:06,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:06,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:07,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928479282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:07,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:37:07,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 30 [2022-11-16 19:37:07,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429026703] [2022-11-16 19:37:07,412 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:07,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 19:37:07,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:37:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 19:37:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-11-16 19:37:07,414 INFO L87 Difference]: Start difference. First operand 71 states and 149 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:10,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:10,771 INFO L93 Difference]: Finished difference Result 160 states and 306 transitions. [2022-11-16 19:37:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:37:10,771 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 19:37:10,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:10,773 INFO L225 Difference]: With dead ends: 160 [2022-11-16 19:37:10,773 INFO L226 Difference]: Without dead ends: 154 [2022-11-16 19:37:10,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=388, Invalid=1592, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 19:37:10,774 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:10,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 193 Invalid, 0 Unknown, 52 Unchecked, 0.9s Time] [2022-11-16 19:37:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-16 19:37:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 128. [2022-11-16 19:37:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 2.119047619047619) internal successors, (267), 127 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 267 transitions. [2022-11-16 19:37:10,782 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 267 transitions. Word has length 16 [2022-11-16 19:37:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:10,783 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 267 transitions. [2022-11-16 19:37:10,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:10,783 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 267 transitions. [2022-11-16 19:37:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 19:37:10,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:10,784 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:10,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:10,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-16 19:37:11,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-16 19:37:11,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:11,388 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:37:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 135624349, now seen corresponding path program 8 times [2022-11-16 19:37:11,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:37:11,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167359169] [2022-11-16 19:37:11,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:37:11,389 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:37:11,390 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:37:11,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 19:37:11,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:37:11,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:37:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:11,673 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:37:11,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:37:11,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:37:11,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:11,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:12,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:37:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167359169] [2022-11-16 19:37:12,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167359169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996964007] [2022-11-16 19:37:12,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:37:12,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:37:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:37:12,485 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:37:12,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-16 19:37:12,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:37:12,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:12,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:37:12,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:13,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:13,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:13,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996964007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:13,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342531000] [2022-11-16 19:37:13,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:37:13,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:13,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:13,301 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:13,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-16 19:37:13,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:37:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 19:37:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:13,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342531000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:14,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:37:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 24 [2022-11-16 19:37:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021136316] [2022-11-16 19:37:14,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:14,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 19:37:14,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:37:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 19:37:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:37:14,544 INFO L87 Difference]: Start difference. First operand 128 states and 267 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:15,548 INFO L93 Difference]: Finished difference Result 99 states and 186 transitions. [2022-11-16 19:37:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:37:15,549 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 19:37:15,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:15,549 INFO L225 Difference]: With dead ends: 99 [2022-11-16 19:37:15,549 INFO L226 Difference]: Without dead ends: 60 [2022-11-16 19:37:15,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2022-11-16 19:37:15,550 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:15,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 19:37:15,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-16 19:37:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-16 19:37:15,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:15,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2022-11-16 19:37:15,552 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 16 [2022-11-16 19:37:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:15,553 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2022-11-16 19:37:15,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2022-11-16 19:37:15,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 19:37:15,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:15,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:15,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:15,764 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-16 19:37:15,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-16 19:37:16,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:16,162 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:37:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:16,162 INFO L85 PathProgramCache]: Analyzing trace with hash 155862575, now seen corresponding path program 9 times [2022-11-16 19:37:16,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:37:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141331486] [2022-11-16 19:37:16,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:37:16,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:16,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:37:16,164 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:37:16,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 19:37:16,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:37:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:16,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:37:16,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:16,446 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:37:16,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:37:16,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:37:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:16,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:17,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:37:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141331486] [2022-11-16 19:37:17,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141331486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1495810773] [2022-11-16 19:37:17,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:37:17,846 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:37:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:37:17,847 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:37:17,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-16 19:37:18,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:37:18,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:18,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:37:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:18,275 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:37:18,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:37:18,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:37:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:18,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:18,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1495810773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:18,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242788747] [2022-11-16 19:37:18,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:37:18,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:18,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:18,829 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:18,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-16 19:37:19,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:37:19,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 19:37:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:19,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:20,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242788747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:20,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:37:20,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 20 [2022-11-16 19:37:20,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104626986] [2022-11-16 19:37:20,742 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:20,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 19:37:20,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:37:20,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 19:37:20,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:37:20,748 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:37:23,025 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2022-11-16 19:37:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 19:37:23,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 19:37:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:37:23,028 INFO L225 Difference]: With dead ends: 195 [2022-11-16 19:37:23,029 INFO L226 Difference]: Without dead ends: 175 [2022-11-16 19:37:23,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2022-11-16 19:37:23,029 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:37:23,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 0 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 19:37:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-16 19:37:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 113. [2022-11-16 19:37:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 2.3063063063063063) internal successors, (256), 112 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 256 transitions. [2022-11-16 19:37:23,035 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 256 transitions. Word has length 17 [2022-11-16 19:37:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:37:23,035 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 256 transitions. [2022-11-16 19:37:23,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:37:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 256 transitions. [2022-11-16 19:37:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:37:23,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:37:23,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:37:23,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:23,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-16 19:37:23,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 19:37:23,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:37:23,640 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:37:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:37:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2045363356, now seen corresponding path program 10 times [2022-11-16 19:37:23,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:37:23,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876397492] [2022-11-16 19:37:23,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:37:23,641 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 [2022-11-16 19:37:23,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:37:23,643 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:37:23,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 19:37:23,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:37:23,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:37:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:23,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:37:23,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:37:24,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:37:24,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:24,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:37:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:37:24,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:24,409 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1585 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1585) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:37:26,984 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:37:26,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2022-11-16 19:37:27,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2022-11-16 19:37:27,205 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:37:27,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2022-11-16 19:37:28,889 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 1 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-16 19:37:28,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:37:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876397492] [2022-11-16 19:37:28,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876397492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:28,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30006651] [2022-11-16 19:37:28,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:37:28,890 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:37:28,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:37:28,891 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:37:28,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-16 19:37:29,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:37:29,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:29,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:37:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:29,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:37:30,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:37:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:37:32,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:37:33,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:37:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:33,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:33,301 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1621 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1621) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:37:36,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:36,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:37:36,700 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:37:36,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 476 treesize of output 416 [2022-11-16 19:37:36,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:37:36,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:36,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 214 treesize of output 178 [2022-11-16 19:37:36,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:36,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 142 [2022-11-16 19:37:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 19:37:41,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30006651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974230931] [2022-11-16 19:37:41,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:37:41,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:37:41,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:37:41,137 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:37:41,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-16 19:37:41,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:37:41,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:37:41,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:37:41,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:37:41,349 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 26 treesize of output 24 [2022-11-16 19:37:44,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:37:44,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:44,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:37:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:45,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:37:46,138 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:37:46,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:37:46,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:37:46,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:37:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:37:48,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974230931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:37:48,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:37:48,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 42 [2022-11-16 19:37:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335374414] [2022-11-16 19:37:48,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:37:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 19:37:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:37:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 19:37:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1485, Unknown=10, NotChecked=162, Total=1892 [2022-11-16 19:37:48,083 INFO L87 Difference]: Start difference. First operand 113 states and 256 transitions. Second operand has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:38:02,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:38:02,497 INFO L93 Difference]: Finished difference Result 231 states and 519 transitions. [2022-11-16 19:38:02,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:38:02,498 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:38:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:38:02,500 INFO L225 Difference]: With dead ends: 231 [2022-11-16 19:38:02,500 INFO L226 Difference]: Without dead ends: 227 [2022-11-16 19:38:02,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=383, Invalid=2474, Unknown=13, NotChecked=210, Total=3080 [2022-11-16 19:38:02,501 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:38:02,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 0 Unknown, 147 Unchecked, 0.7s Time] [2022-11-16 19:38:02,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-16 19:38:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 138. [2022-11-16 19:38:02,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 136 states have (on average 2.301470588235294) internal successors, (313), 137 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:38:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 313 transitions. [2022-11-16 19:38:02,507 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 313 transitions. Word has length 18 [2022-11-16 19:38:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:38:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 313 transitions. [2022-11-16 19:38:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:38:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 313 transitions. [2022-11-16 19:38:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:38:02,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:38:02,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:38:02,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-16 19:38:02,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 19:38:02,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-16 19:38:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:03,115 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:38:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:38:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1141378740, now seen corresponding path program 11 times [2022-11-16 19:38:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:38:03,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1584143213] [2022-11-16 19:38:03,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:38:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:38:03,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:38:03,116 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:38:03,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 19:38:03,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:38:03,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:38:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:38:03,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:03,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:38:03,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:38:03,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:03,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:38:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:38:03,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:04,106 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:38:04,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 81 [2022-11-16 19:38:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:38:04,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:38:04,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1584143213] [2022-11-16 19:38:04,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1584143213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:38:04,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1141106798] [2022-11-16 19:38:04,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:38:04,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:38:04,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:38:04,488 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:38:04,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-16 19:38:05,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:38:05,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:38:05,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 19:38:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:05,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:38:05,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:38:06,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:38:06,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2022-11-16 19:38:07,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 28 [2022-11-16 19:38:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:38:07,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:17,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:17,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 617 treesize of output 236 [2022-11-16 19:38:17,928 INFO L321 Elim1Store]: treesize reduction 336, result has 23.8 percent of original size [2022-11-16 19:38:17,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 568 treesize of output 529 [2022-11-16 19:38:18,519 INFO L321 Elim1Store]: treesize reduction 336, result has 23.8 percent of original size [2022-11-16 19:38:18,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 425 treesize of output 418 [2022-11-16 19:38:18,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:18,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 142 [2022-11-16 19:38:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:38:39,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1141106798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:38:39,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226690687] [2022-11-16 19:38:39,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:38:39,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:38:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:38:39,223 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:38:39,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-16 19:38:39,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:38:39,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:38:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:38:39,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:38:39,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-16 19:38:40,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:38:41,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:41,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:38:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:38:41,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:38:41,692 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:38:41,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:38:41,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:38:41,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:38:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:38:51,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226690687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:38:51,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:38:51,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 40 [2022-11-16 19:38:51,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095453666] [2022-11-16 19:38:51,610 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:38:51,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 19:38:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:38:51,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 19:38:51,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1446, Unknown=9, NotChecked=0, Total=1722 [2022-11-16 19:38:51,612 INFO L87 Difference]: Start difference. First operand 138 states and 313 transitions. Second operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:39:28,982 WARN L233 SmtUtils]: Spent 36.22s on a formula simplification. DAG size of input: 63 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:39:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:39:30,605 INFO L93 Difference]: Finished difference Result 219 states and 514 transitions. [2022-11-16 19:39:30,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 19:39:30,606 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:39:30,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:39:30,607 INFO L225 Difference]: With dead ends: 219 [2022-11-16 19:39:30,607 INFO L226 Difference]: Without dead ends: 217 [2022-11-16 19:39:30,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=379, Invalid=2062, Unknown=9, NotChecked=0, Total=2450 [2022-11-16 19:39:30,609 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:39:30,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 155 Unchecked, 0.9s Time] [2022-11-16 19:39:30,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-16 19:39:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 146. [2022-11-16 19:39:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 2.3125) internal successors, (333), 145 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:39:30,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 333 transitions. [2022-11-16 19:39:30,615 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 333 transitions. Word has length 18 [2022-11-16 19:39:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:39:30,615 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 333 transitions. [2022-11-16 19:39:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 41 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:39:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 333 transitions. [2022-11-16 19:39:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:39:30,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:39:30,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:39:30,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:30,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:31,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-16 19:39:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:39:31,230 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:39:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:39:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1105629540, now seen corresponding path program 12 times [2022-11-16 19:39:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:39:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698266081] [2022-11-16 19:39:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:39:31,231 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:39:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:39:31,232 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:39:31,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 19:39:31,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 19:39:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:39:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:39:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:31,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:39:31,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:39:31,851 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:31,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:39:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:39:31,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:39:32,009 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1790 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1790) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))))) is different from false [2022-11-16 19:39:32,319 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:39:32,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:39:32,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:32,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:39:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-16 19:39:32,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:39:32,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698266081] [2022-11-16 19:39:32,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698266081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:39:32,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1759045671] [2022-11-16 19:39:32,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:39:32,709 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:39:32,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:39:32,710 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:39:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-16 19:39:33,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 19:39:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:39:33,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 19:39:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:33,472 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:39:33,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:39:33,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:39:33,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 19:39:33,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:39:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:39:34,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:39:35,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:39:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:39:35,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:39:40,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:40,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 167 [2022-11-16 19:39:56,802 WARN L233 SmtUtils]: Spent 16.37s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:39:56,802 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:39:56,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 186 treesize of output 162 [2022-11-16 19:39:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:39:56,888 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-16 19:39:56,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 51 [2022-11-16 19:39:56,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:56,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 110 [2022-11-16 19:39:57,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 58 [2022-11-16 19:39:57,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 10 [2022-11-16 19:39:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:39:57,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1759045671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:39:57,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553193547] [2022-11-16 19:39:57,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:39:57,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:39:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:39:57,580 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:39:57,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-16 19:39:57,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 19:39:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:39:57,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:39:57,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:39:57,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:39:58,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:39:58,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:39:58,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:39:59,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:39:59,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:39:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:39:59,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:05,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:05,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:40:06,104 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:40:06,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2022-11-16 19:40:06,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2022-11-16 19:40:06,385 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:40:06,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2022-11-16 19:40:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:10,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553193547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:10,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:40:10,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 41 [2022-11-16 19:40:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539192060] [2022-11-16 19:40:10,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:40:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 19:40:10,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:40:10,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 19:40:10,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1470, Unknown=5, NotChecked=80, Total=1806 [2022-11-16 19:40:10,698 INFO L87 Difference]: Start difference. First operand 146 states and 333 transitions. Second operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:41,789 WARN L233 SmtUtils]: Spent 30.19s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:40:43,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:40:43,715 INFO L93 Difference]: Finished difference Result 212 states and 506 transitions. [2022-11-16 19:40:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:40:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:40:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:40:43,718 INFO L225 Difference]: With dead ends: 212 [2022-11-16 19:40:43,718 INFO L226 Difference]: Without dead ends: 209 [2022-11-16 19:40:43,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=343, Invalid=2106, Unknown=5, NotChecked=96, Total=2550 [2022-11-16 19:40:43,719 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:40:43,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 192 Unchecked, 0.6s Time] [2022-11-16 19:40:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-16 19:40:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 149. [2022-11-16 19:40:43,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 2.326530612244898) internal successors, (342), 148 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:43,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 342 transitions. [2022-11-16 19:40:43,725 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 342 transitions. Word has length 18 [2022-11-16 19:40:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:40:43,726 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 342 transitions. [2022-11-16 19:40:43,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:40:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 342 transitions. [2022-11-16 19:40:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:40:43,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:40:43,727 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:40:43,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-16 19:40:43,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-16 19:40:44,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-11-16 19:40:44,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:40:44,339 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:40:44,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:40:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2012146190, now seen corresponding path program 13 times [2022-11-16 19:40:44,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:40:44,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1386837125] [2022-11-16 19:40:44,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:40:44,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:40:44,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:40:44,341 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:40:44,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 19:40:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:44,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:40:44,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:44,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:40:44,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:40:44,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:44,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:40:44,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:40:44,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:45,077 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1899 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1899) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:40:45,280 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:40:45,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:40:45,440 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:45,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:40:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-16 19:40:45,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:40:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1386837125] [2022-11-16 19:40:45,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1386837125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:40:45,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1420580083] [2022-11-16 19:40:45,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:40:45,641 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:40:45,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:40:45,644 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:40:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-16 19:40:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:40:46,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:40:46,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:40:46,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:40:46,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:40:47,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:40:47,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:40:47,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:40:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:40:47,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:40:53,130 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:40:53,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 167 [2022-11-16 19:41:09,643 WARN L233 SmtUtils]: Spent 16.50s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:41:09,643 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:41:09,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 186 treesize of output 162 [2022-11-16 19:41:09,770 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-16 19:41:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 100 treesize of output 51 [2022-11-16 19:41:09,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:09,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 110 [2022-11-16 19:41:09,907 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:09,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 58 [2022-11-16 19:41:09,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:09,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 10 [2022-11-16 19:41:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:41:10,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1420580083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:10,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198663070] [2022-11-16 19:41:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:41:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:41:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:41:10,504 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:41:10,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-16 19:41:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:41:10,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:41:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:10,730 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 26 treesize of output 24 [2022-11-16 19:41:11,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:41:12,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:12,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:41:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:41:12,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:13,374 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:41:13,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:41:13,557 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:13,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:41:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:41:15,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198663070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:15,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:41:15,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 41 [2022-11-16 19:41:15,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483822100] [2022-11-16 19:41:15,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:41:15,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 19:41:15,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:41:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 19:41:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1482, Unknown=3, NotChecked=80, Total=1806 [2022-11-16 19:41:15,240 INFO L87 Difference]: Start difference. First operand 149 states and 342 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:46,507 WARN L233 SmtUtils]: Spent 30.17s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:41:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:41:50,073 INFO L93 Difference]: Finished difference Result 239 states and 541 transitions. [2022-11-16 19:41:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 19:41:50,074 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:41:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:41:50,075 INFO L225 Difference]: With dead ends: 239 [2022-11-16 19:41:50,075 INFO L226 Difference]: Without dead ends: 233 [2022-11-16 19:41:50,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 43.1s TimeCoverageRelationStatistics Valid=399, Invalid=2464, Unknown=3, NotChecked=104, Total=2970 [2022-11-16 19:41:50,076 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:41:50,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 93 Unchecked, 1.2s Time] [2022-11-16 19:41:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-16 19:41:50,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 154. [2022-11-16 19:41:50,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 152 states have (on average 2.3289473684210527) internal successors, (354), 153 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 354 transitions. [2022-11-16 19:41:50,082 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 354 transitions. Word has length 18 [2022-11-16 19:41:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:41:50,082 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 354 transitions. [2022-11-16 19:41:50,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:41:50,083 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 354 transitions. [2022-11-16 19:41:50,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:41:50,084 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:41:50,084 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:41:50,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:50,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 19:41:50,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (70)] Forceful destruction successful, exit code 0 [2022-11-16 19:41:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:41:50,691 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:41:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:41:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 880079410, now seen corresponding path program 14 times [2022-11-16 19:41:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:41:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272805352] [2022-11-16 19:41:50,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:41:50,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:41:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:41:50,693 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:41:50,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 19:41:50,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:41:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:41:50,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:50,955 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 26 treesize of output 24 [2022-11-16 19:41:51,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:41:51,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:41:51,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:41:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:41:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:41:51,743 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:41:51,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 81 [2022-11-16 19:41:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:41:52,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:41:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272805352] [2022-11-16 19:41:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272805352] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:41:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2133840017] [2022-11-16 19:41:52,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:41:52,094 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:41:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:41:52,095 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:41:52,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-16 19:41:52,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:41:52,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:41:52,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 19:41:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:41:52,921 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:41:52,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:41:53,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:41:53,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 19:41:53,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:41:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:41:54,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:41:54,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:41:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:41:54,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:00,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:42:00,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 110 [2022-11-16 19:42:00,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 58 [2022-11-16 19:42:00,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 10 [2022-11-16 19:42:00,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:42:00,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 167 [2022-11-16 19:42:16,774 WARN L233 SmtUtils]: Spent 16.36s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:42:16,775 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:42:16,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 186 treesize of output 162 [2022-11-16 19:42:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:42:16,891 INFO L321 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2022-11-16 19:42:16,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 51 [2022-11-16 19:42:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:42:17,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2133840017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:17,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493244525] [2022-11-16 19:42:17,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:42:17,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:42:17,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:42:17,666 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:42:17,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-16 19:42:17,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:42:17,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:42:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 19:42:17,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:42:17,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:42:18,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:42:18,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:42:19,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:42:20,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:42:20,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:42:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:42:20,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:42:27,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:42:27,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:42:27,596 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:42:27,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2022-11-16 19:42:27,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2022-11-16 19:42:27,953 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:42:27,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2022-11-16 19:42:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:42:33,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493244525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:42:33,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:42:33,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 40 [2022-11-16 19:42:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663378330] [2022-11-16 19:42:33,196 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:42:33,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 19:42:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:42:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 19:42:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1469, Unknown=4, NotChecked=0, Total=1722 [2022-11-16 19:42:33,197 INFO L87 Difference]: Start difference. First operand 154 states and 354 transitions. Second operand has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:04,337 WARN L233 SmtUtils]: Spent 30.23s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:43:07,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:07,025 INFO L93 Difference]: Finished difference Result 220 states and 522 transitions. [2022-11-16 19:43:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:43:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:43:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:07,029 INFO L225 Difference]: With dead ends: 220 [2022-11-16 19:43:07,029 INFO L226 Difference]: Without dead ends: 213 [2022-11-16 19:43:07,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 48.7s TimeCoverageRelationStatistics Valid=340, Invalid=2106, Unknown=4, NotChecked=0, Total=2450 [2022-11-16 19:43:07,031 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:07,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 102 Unchecked, 0.9s Time] [2022-11-16 19:43:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-16 19:43:07,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2022-11-16 19:43:07,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 155 states have (on average 2.3419354838709676) internal successors, (363), 156 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 363 transitions. [2022-11-16 19:43:07,038 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 363 transitions. Word has length 18 [2022-11-16 19:43:07,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:07,039 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 363 transitions. [2022-11-16 19:43:07,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.829268292682927) internal successors, (75), 41 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:07,039 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 363 transitions. [2022-11-16 19:43:07,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:43:07,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:07,040 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:07,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-16 19:43:07,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-16 19:43:07,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 19:43:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:43:07,647 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:43:07,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -2085882294, now seen corresponding path program 15 times [2022-11-16 19:43:07,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:43:07,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1205826530] [2022-11-16 19:43:07,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:07,648 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 [2022-11-16 19:43:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:43:07,649 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:43:07,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 19:43:07,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:43:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:07,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:43:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:07,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:43:08,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:43:08,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:08,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:43:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:43:08,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:08,531 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2108 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2108) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:43:08,793 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:43:08,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:43:08,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:08,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:43:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2022-11-16 19:43:09,252 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:43:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1205826530] [2022-11-16 19:43:09,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1205826530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:09,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121377272] [2022-11-16 19:43:09,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:09,253 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:43:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:43:09,254 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:43:09,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-16 19:43:10,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:43:10,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:10,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 19:43:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:10,173 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 19:43:10,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 19:43:10,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-16 19:43:10,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:43:10,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:11,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:11,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:43:12,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:43:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:12,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:12,473 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2147 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2147) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:43:17,764 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:17,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:43:18,161 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:43:18,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 476 treesize of output 416 [2022-11-16 19:43:18,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:43:18,354 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:18,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 214 treesize of output 178 [2022-11-16 19:43:18,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 142 [2022-11-16 19:43:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 19:43:22,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121377272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:22,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955680954] [2022-11-16 19:43:22,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:43:22,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:43:22,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:43:22,008 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:43:22,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-16 19:43:22,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:43:22,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 19:43:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:22,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:43:22,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:43:22,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:23,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:43:24,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:24,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:43:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:24,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:31,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:31,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:43:31,711 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:43:31,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 476 treesize of output 416 [2022-11-16 19:43:32,024 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:43:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 368 treesize of output 332 [2022-11-16 19:43:32,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:32,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 142 [2022-11-16 19:43:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:36,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955680954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:36,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:43:36,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 42 [2022-11-16 19:43:36,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949638534] [2022-11-16 19:43:36,035 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:43:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 19:43:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:43:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 19:43:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1471, Unknown=6, NotChecked=162, Total=1892 [2022-11-16 19:43:36,036 INFO L87 Difference]: Start difference. First operand 157 states and 363 transitions. Second operand has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:50,932 WARN L233 SmtUtils]: Spent 14.07s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:43:52,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:43:52,771 INFO L93 Difference]: Finished difference Result 239 states and 540 transitions. [2022-11-16 19:43:52,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 19:43:52,772 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:43:52,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:43:52,774 INFO L225 Difference]: With dead ends: 239 [2022-11-16 19:43:52,774 INFO L226 Difference]: Without dead ends: 231 [2022-11-16 19:43:52,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=331, Invalid=2022, Unknown=7, NotChecked=190, Total=2550 [2022-11-16 19:43:52,775 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 19:43:52,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 225 Unchecked, 0.8s Time] [2022-11-16 19:43:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-16 19:43:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 152. [2022-11-16 19:43:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 2.34) internal successors, (351), 151 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 351 transitions. [2022-11-16 19:43:52,781 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 351 transitions. Word has length 18 [2022-11-16 19:43:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:43:52,782 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 351 transitions. [2022-11-16 19:43:52,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 43 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:43:52,782 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 351 transitions. [2022-11-16 19:43:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:43:52,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:43:52,783 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:43:52,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-16 19:43:52,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 19:43:53,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-16 19:43:53,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt [2022-11-16 19:43:53,391 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:43:53,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:43:53,391 INFO L85 PathProgramCache]: Analyzing trace with hash -224218876, now seen corresponding path program 16 times [2022-11-16 19:43:53,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:43:53,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126615717] [2022-11-16 19:43:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:53,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:43:53,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:43:53,392 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:43:53,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 19:43:53,648 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 19:43:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:53,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:43:53,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:43:53,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:53,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:43:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:43:54,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:43:54,157 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2221 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2221) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:43:54,334 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:43:54,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:43:54,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:43:54,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:43:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:43:54,708 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:43:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126615717] [2022-11-16 19:43:54,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126615717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:43:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740837586] [2022-11-16 19:43:54,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:43:54,709 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:43:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:43:54,710 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:43:54,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-16 19:43:55,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:43:55,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:43:55,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:43:55,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:43:55,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:43:55,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:43:56,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:43:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:43:56,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:43:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:43:56,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:02,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 202 treesize of output 110 [2022-11-16 19:44:02,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:02,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 94 treesize of output 58 [2022-11-16 19:44:02,284 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:02,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 10 [2022-11-16 19:44:02,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:02,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 404 treesize of output 167 [2022-11-16 19:44:18,765 WARN L233 SmtUtils]: Spent 16.38s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:44:18,765 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:44:18,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 186 treesize of output 162 [2022-11-16 19:44:18,907 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-16 19:44:18,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 100 treesize of output 51 [2022-11-16 19:44:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:19,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740837586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:19,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909097006] [2022-11-16 19:44:19,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:44:19,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:44:19,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:44:19,506 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:44:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-16 19:44:19,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:44:19,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:44:19,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:44:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:44:19,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:44:20,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:44:21,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:21,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:44:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:21,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:44:22,540 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:44:22,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:44:22,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:44:22,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:44:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:44:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909097006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:44:24,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:44:24,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 41 [2022-11-16 19:44:24,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649543059] [2022-11-16 19:44:24,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:44:24,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 19:44:24,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:44:24,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 19:44:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1482, Unknown=3, NotChecked=80, Total=1806 [2022-11-16 19:44:24,523 INFO L87 Difference]: Start difference. First operand 152 states and 351 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:44:56,201 WARN L233 SmtUtils]: Spent 30.23s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:45:00,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:45:00,023 INFO L93 Difference]: Finished difference Result 256 states and 565 transitions. [2022-11-16 19:45:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:45:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:45:00,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:45:00,026 INFO L225 Difference]: With dead ends: 256 [2022-11-16 19:45:00,026 INFO L226 Difference]: Without dead ends: 246 [2022-11-16 19:45:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 43.0s TimeCoverageRelationStatistics Valid=382, Invalid=2375, Unknown=3, NotChecked=102, Total=2862 [2022-11-16 19:45:00,027 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:45:00,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 383 Invalid, 0 Unknown, 285 Unchecked, 2.1s Time] [2022-11-16 19:45:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-16 19:45:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2022-11-16 19:45:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 142 states have (on average 2.3380281690140845) internal successors, (332), 143 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:45:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 332 transitions. [2022-11-16 19:45:00,033 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 332 transitions. Word has length 18 [2022-11-16 19:45:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:45:00,033 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 332 transitions. [2022-11-16 19:45:00,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:45:00,034 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 332 transitions. [2022-11-16 19:45:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:45:00,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:45:00,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:45:00,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:00,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-16 19:45:00,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -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)] Ended with exit code 0 [2022-11-16 19:45:00,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:45:00,641 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:45:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:45:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1772503792, now seen corresponding path program 17 times [2022-11-16 19:45:00,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:45:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190087344] [2022-11-16 19:45:00,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:45:00,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:45:00,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:45:00,643 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:45:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 19:45:01,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:01,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:45:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:01,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:45:01,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:45:01,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:01,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:45:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:45:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:01,567 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2321 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2321) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:45:01,752 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:45:01,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:45:01,911 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:01,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:45:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:45:02,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:45:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190087344] [2022-11-16 19:45:02,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190087344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:02,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736407344] [2022-11-16 19:45:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:45:02,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:45:02,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:45:02,120 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:45:02,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-16 19:45:03,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 19:45:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:04,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 49 [2022-11-16 19:45:04,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:45:04,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:45:04,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2022-11-16 19:45:05,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 28 [2022-11-16 19:45:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:05,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:16,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:16,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 617 treesize of output 236 [2022-11-16 19:45:17,058 INFO L321 Elim1Store]: treesize reduction 336, result has 23.8 percent of original size [2022-11-16 19:45:17,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 568 treesize of output 529 [2022-11-16 19:45:17,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 198 [2022-11-16 19:45:17,632 INFO L321 Elim1Store]: treesize reduction 336, result has 23.8 percent of original size [2022-11-16 19:45:17,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 313 treesize of output 306 [2022-11-16 19:45:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:43,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736407344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:43,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145447738] [2022-11-16 19:45:43,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 19:45:43,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:45:43,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:45:43,423 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:45:43,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-16 19:45:43,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:45:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:45:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:45:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:45:43,795 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 26 treesize of output 24 [2022-11-16 19:45:44,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:45:45,517 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:45,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:45:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:45,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:45:46,217 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:45:46,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:45:46,231 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:45:46,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:45:56,225 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:45:56,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145447738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:45:56,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:45:56,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 41 [2022-11-16 19:45:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651767554] [2022-11-16 19:45:56,226 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:45:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-16 19:45:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:45:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-16 19:45:56,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1448, Unknown=9, NotChecked=80, Total=1806 [2022-11-16 19:45:56,227 INFO L87 Difference]: Start difference. First operand 144 states and 332 transitions. Second operand has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:34,867 WARN L233 SmtUtils]: Spent 37.31s on a formula simplification. DAG size of input: 63 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:46:36,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:36,442 INFO L93 Difference]: Finished difference Result 226 states and 535 transitions. [2022-11-16 19:46:36,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:46:36,443 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:46:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:36,444 INFO L225 Difference]: With dead ends: 226 [2022-11-16 19:46:36,445 INFO L226 Difference]: Without dead ends: 222 [2022-11-16 19:46:36,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 62.0s TimeCoverageRelationStatistics Valid=380, Invalid=2065, Unknown=9, NotChecked=96, Total=2550 [2022-11-16 19:46:36,446 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:36,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 128 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2022-11-16 19:46:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-16 19:46:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2022-11-16 19:46:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 149 states have (on average 2.38255033557047) internal successors, (355), 150 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 355 transitions. [2022-11-16 19:46:36,452 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 355 transitions. Word has length 18 [2022-11-16 19:46:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:36,452 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 355 transitions. [2022-11-16 19:46:36,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 42 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:36,453 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 355 transitions. [2022-11-16 19:46:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:46:36,453 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:36,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:36,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:36,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-16 19:46:36,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 19:46:37,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:46:37,062 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:46:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1122695038, now seen corresponding path program 18 times [2022-11-16 19:46:37,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:46:37,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [483176186] [2022-11-16 19:46:37,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:46:37,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:46:37,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:46:37,064 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:46:37,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 19:46:37,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 19:46:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:37,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 19:46:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:37,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-16 19:46:37,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:46:37,654 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:37,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:46:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:46:37,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:37,836 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2423 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2423) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))))) is different from false [2022-11-16 19:46:38,111 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:46:38,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:46:38,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:38,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:46:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:46:38,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:46:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [483176186] [2022-11-16 19:46:38,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [483176186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:38,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2034489673] [2022-11-16 19:46:38,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:46:38,469 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:46:38,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:46:38,470 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:46:38,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-16 19:46:38,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:46:38,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208035282] [2022-11-16 19:46:38,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 19:46:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:38,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:46:38,878 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:46:38,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 1 [2022-11-16 19:46:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-16 19:46:39,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 19:46:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:46:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:46:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:39,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:46:39,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:46:40,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:40,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:46:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:40,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:41,210 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:46:41,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:46:41,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:41,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:46:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:42,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208035282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:42,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 19:46:42,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9] total 28 [2022-11-16 19:46:42,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5137941] [2022-11-16 19:46:42,865 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 19:46:42,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 19:46:42,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:46:42,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 19:46:42,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=689, Unknown=1, NotChecked=54, Total=870 [2022-11-16 19:46:42,866 INFO L87 Difference]: Start difference. First operand 151 states and 355 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:46,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:49,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:53,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:46:55,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:46:55,024 INFO L93 Difference]: Finished difference Result 258 states and 685 transitions. [2022-11-16 19:46:55,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 19:46:55,025 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:46:55,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:46:55,026 INFO L225 Difference]: With dead ends: 258 [2022-11-16 19:46:55,027 INFO L226 Difference]: Without dead ends: 253 [2022-11-16 19:46:55,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=320, Invalid=1752, Unknown=2, NotChecked=88, Total=2162 [2022-11-16 19:46:55,028 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 47 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:46:55,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 348 Invalid, 3 Unknown, 199 Unchecked, 7.7s Time] [2022-11-16 19:46:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-16 19:46:55,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 204. [2022-11-16 19:46:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 202 states have (on average 2.6584158415841586) internal successors, (537), 203 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:55,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 537 transitions. [2022-11-16 19:46:55,035 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 537 transitions. Word has length 18 [2022-11-16 19:46:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:46:55,035 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 537 transitions. [2022-11-16 19:46:55,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:46:55,036 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 537 transitions. [2022-11-16 19:46:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:46:55,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:46:55,037 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:46:55,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:55,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-11-16 19:46:55,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:46:55,450 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:46:55,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:46:55,450 INFO L85 PathProgramCache]: Analyzing trace with hash 70738046, now seen corresponding path program 19 times [2022-11-16 19:46:55,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:46:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004521429] [2022-11-16 19:46:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:46:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:46:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:46:55,452 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:46:55,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-16 19:46:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 19:46:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:55,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 19:46:55,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:46:56,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:56,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:46:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:46:56,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:56,258 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2516 (Array (_ BitVec 32) (_ BitVec 8)))) (= (_ bv5 32) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2516) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))))) is different from false [2022-11-16 19:46:56,545 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:46:56,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:46:56,554 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:46:56,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:46:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:46:56,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:46:56,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004521429] [2022-11-16 19:46:56,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004521429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:46:56,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1672873852] [2022-11-16 19:46:56,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:46:56,919 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:46:56,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:46:56,920 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:46:56,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-16 19:46:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:46:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:46:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:46:57,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:46:58,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:46:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:46:58,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:46:59,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:46:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:46:59,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:46:59,369 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2552 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2552) c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~front~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv7 32))) (select .cse0 (bvadd c_~queue~0.offset (_ bv6 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv5 32)))) (select .cse0 (bvadd c_~queue~0.offset (_ bv4 32) .cse1)))) (_ bv5 32))) is different from false [2022-11-16 19:47:04,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:04,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 416 treesize of output 179 [2022-11-16 19:47:05,016 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:47:05,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 280 treesize of output 256 [2022-11-16 19:47:05,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 94 [2022-11-16 19:47:05,286 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:47:05,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 119 treesize of output 111 [2022-11-16 19:47:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:09,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1672873852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046734737] [2022-11-16 19:47:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 19:47:09,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:09,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:09,469 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:09,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-16 19:47:09,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:47:09,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 19:47:09,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:09,720 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 26 treesize of output 24 [2022-11-16 19:47:10,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2022-11-16 19:47:11,500 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:11,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:47:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:11,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:12,701 INFO L321 Elim1Store]: treesize reduction 168, result has 25.3 percent of original size [2022-11-16 19:47:12,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 137 treesize of output 122 [2022-11-16 19:47:12,899 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:12,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 9 [2022-11-16 19:47:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:14,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046734737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:14,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:47:14,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 9, 9, 9] total 42 [2022-11-16 19:47:14,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061489564] [2022-11-16 19:47:14,712 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:14,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 19:47:14,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:47:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 19:47:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1483, Unknown=4, NotChecked=162, Total=1892 [2022-11-16 19:47:14,714 INFO L87 Difference]: Start difference. First operand 204 states and 537 transitions. Second operand has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:30,250 WARN L233 SmtUtils]: Spent 14.08s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 19:47:31,236 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse10 (bvmul (_ bv4 32) c_~front~0))) (let ((.cse4 (bvadd c_~queue~0.offset .cse10 (_ bv7 32))) (.cse5 (bvadd c_~queue~0.offset (_ bv6 32) .cse10)) (.cse6 (bvadd c_~queue~0.offset .cse10 (_ bv5 32))) (.cse7 (bvadd c_~queue~0.offset (_ bv4 32) .cse10))) (let ((.cse2 (forall ((v_ArrVal_2552 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2552) c_~queue~0.base))) (concat (concat (concat (select .cse9 .cse4) (select .cse9 .cse5)) (select .cse9 .cse6)) (select .cse9 .cse7))) (_ bv5 32))))) (and (or (not (bvsge c_~back~0 (_ bv0 32))) (not (= (let ((.cse0 (select |c_#memory_int| c_~queue~0.base)) (.cse1 (bvmul (_ bv4 32) c_~back~0))) (concat (concat (concat (select .cse0 (bvadd c_~queue~0.offset (_ bv3 32) .cse1)) (select .cse0 (bvadd c_~queue~0.offset (_ bv2 32) .cse1))) (select .cse0 (bvadd c_~queue~0.offset .cse1 (_ bv1 32)))) (select .cse0 (bvadd c_~queue~0.offset .cse1)))) (_ bv5 32))) .cse2 (not (bvslt c_~back~0 c_~n~0))) .cse2 (let ((.cse8 (bvadd c_~front~0 (_ bv1 32)))) (or (forall ((v_ArrVal_2584 (Array (_ BitVec 32) (_ BitVec 8)))) (= (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2584) c_~queue~0.base))) (concat (concat (concat (select .cse3 .cse4) (select .cse3 .cse5)) (select .cse3 .cse6)) (select .cse3 .cse7))) (_ bv5 32))) (not (bvsge .cse8 (_ bv0 32))) (not (bvslt .cse8 c_~n~0)) (not (bvsge c_~front~0 (_ bv0 32))))))))) is different from false [2022-11-16 19:47:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:33,841 INFO L93 Difference]: Finished difference Result 290 states and 752 transitions. [2022-11-16 19:47:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 19:47:33,842 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:47:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:33,847 INFO L225 Difference]: With dead ends: 290 [2022-11-16 19:47:33,848 INFO L226 Difference]: Without dead ends: 285 [2022-11-16 19:47:33,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=366, Invalid=2293, Unknown=5, NotChecked=306, Total=2970 [2022-11-16 19:47:33,850 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:33,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 0 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 400 Unchecked, 1.4s Time] [2022-11-16 19:47:33,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-16 19:47:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 208. [2022-11-16 19:47:33,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 206 states have (on average 2.70873786407767) internal successors, (558), 207 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 558 transitions. [2022-11-16 19:47:33,858 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 558 transitions. Word has length 18 [2022-11-16 19:47:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:33,858 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 558 transitions. [2022-11-16 19:47:33,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.8837209302325582) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:33,858 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 558 transitions. [2022-11-16 19:47:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:47:33,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:33,861 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:33,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:34,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-11-16 19:47:34,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:47:34,468 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:47:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1975402022, now seen corresponding path program 20 times [2022-11-16 19:47:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:47:34,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [904285995] [2022-11-16 19:47:34,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:47:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:47:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:47:34,470 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:47:34,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 19:47:34,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:47:34,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:34,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:47:34,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:34,889 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:34,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:47:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:47:34,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:35,133 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:47:35,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:47:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:47:35,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:47:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [904285995] [2022-11-16 19:47:35,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [904285995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:35,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1972597483] [2022-11-16 19:47:35,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:47:35,249 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:47:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:47:35,250 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:47:35,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-16 19:47:35,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:47:35,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806775331] [2022-11-16 19:47:35,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 19:47:35,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:35,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:35,674 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:35,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 1 [2022-11-16 19:47:35,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-16 19:47:35,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 19:47:35,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:35,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:47:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:36,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:36,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:47:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:36,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:37,550 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:47:37,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:47:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:38,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806775331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:38,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 19:47:38,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8] total 22 [2022-11-16 19:47:38,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434241900] [2022-11-16 19:47:38,838 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:38,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:47:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:47:38,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:47:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:47:38,839 INFO L87 Difference]: Start difference. First operand 208 states and 558 transitions. Second operand has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:46,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:47:49,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:47:51,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:47:52,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:47:52,429 INFO L93 Difference]: Finished difference Result 592 states and 1590 transitions. [2022-11-16 19:47:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:47:52,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:47:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:47:52,435 INFO L225 Difference]: With dead ends: 592 [2022-11-16 19:47:52,435 INFO L226 Difference]: Without dead ends: 586 [2022-11-16 19:47:52,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 19:47:52,436 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 213 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 60 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:47:52,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 0 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 555 Invalid, 3 Unknown, 281 Unchecked, 9.6s Time] [2022-11-16 19:47:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-11-16 19:47:52,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 353. [2022-11-16 19:47:52,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 351 states have (on average 2.9316239316239314) internal successors, (1029), 352 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1029 transitions. [2022-11-16 19:47:52,463 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1029 transitions. Word has length 18 [2022-11-16 19:47:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:47:52,463 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 1029 transitions. [2022-11-16 19:47:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:47:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1029 transitions. [2022-11-16 19:47:52,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:47:52,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:47:52,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:47:52,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:52,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-16 19:47:52,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:52,879 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:47:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:47:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash -831427622, now seen corresponding path program 21 times [2022-11-16 19:47:52,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:47:52,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335087868] [2022-11-16 19:47:52,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:47:52,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:47:52,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:47:52,882 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:47:52,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-16 19:47:53,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:47:53,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:47:53,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:53,339 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:53,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:47:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:47:53,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:53,642 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:47:53,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:47:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:47:53,774 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:47:53,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335087868] [2022-11-16 19:47:53,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335087868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:53,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1052574842] [2022-11-16 19:47:53,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:47:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:47:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:47:53,776 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:47:53,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-16 19:47:54,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 19:47:54,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661920794] [2022-11-16 19:47:54,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:47:54,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:47:54,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:47:54,234 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:47:54,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 1 [2022-11-16 19:47:54,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-16 19:47:54,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:47:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:47:54,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:47:54,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:47:55,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:47:55,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:47:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:55,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:47:56,175 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:47:56,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:47:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:47:57,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661920794] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:47:57,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-16 19:47:57,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8] total 22 [2022-11-16 19:47:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727380911] [2022-11-16 19:47:57,583 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-16 19:47:57,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-16 19:47:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:47:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-16 19:47:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:47:57,584 INFO L87 Difference]: Start difference. First operand 353 states and 1029 transitions. Second operand has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:05,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:08,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:10,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:13,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 19:48:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:48:14,199 INFO L93 Difference]: Finished difference Result 699 states and 1736 transitions. [2022-11-16 19:48:14,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 19:48:14,201 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 19:48:14,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:48:14,204 INFO L225 Difference]: With dead ends: 699 [2022-11-16 19:48:14,204 INFO L226 Difference]: Without dead ends: 680 [2022-11-16 19:48:14,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=352, Invalid=1370, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 19:48:14,206 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 203 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 46 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2022-11-16 19:48:14,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 0 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 773 Invalid, 4 Unknown, 469 Unchecked, 12.5s Time] [2022-11-16 19:48:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-11-16 19:48:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 337. [2022-11-16 19:48:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 335 states have (on average 2.946268656716418) internal successors, (987), 336 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 987 transitions. [2022-11-16 19:48:14,221 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 987 transitions. Word has length 18 [2022-11-16 19:48:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:48:14,222 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 987 transitions. [2022-11-16 19:48:14,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:48:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 987 transitions. [2022-11-16 19:48:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 19:48:14,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:48:14,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:48:14,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-16 19:48:14,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-11-16 19:48:14,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:14,637 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2022-11-16 19:48:14,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:48:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1154281328, now seen corresponding path program 22 times [2022-11-16 19:48:14,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-16 19:48:14,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826277460] [2022-11-16 19:48:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:48:14,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 19:48:14,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat [2022-11-16 19:48:14,639 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 19:48:14,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-16 19:48:14,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:48:14,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 19:48:14,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:15,064 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:48:15,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2022-11-16 19:48:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:48:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:15,349 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:48:15,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:48:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:48:15,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-16 19:48:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826277460] [2022-11-16 19:48:15,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826277460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:15,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823706765] [2022-11-16 19:48:15,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:48:15,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 19:48:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 [2022-11-16 19:48:15,483 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 19:48:15,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-16 19:48:16,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:48:16,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:16,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 19:48:16,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:16,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 37 [2022-11-16 19:48:16,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:48:17,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:48:17,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:48:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:17,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:27,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:48:27,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 428 treesize of output 191 [2022-11-16 19:48:43,813 WARN L233 SmtUtils]: Spent 16.52s on a formula simplification. DAG size of input: 78 DAG size of output: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:48:43,813 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-16 19:48:43,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 772 treesize of output 676 [2022-11-16 19:48:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:43,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:48:52,130 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 19:48:52,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:48:52,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 4 case distinctions, treesize of input 474 treesize of output 410 [2022-11-16 19:48:52,316 INFO L321 Elim1Store]: treesize reduction 210, result has 3.2 percent of original size [2022-11-16 19:48:52,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 516 treesize of output 299 [2022-11-16 19:48:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:53,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823706765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:53,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934672904] [2022-11-16 19:48:53,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 19:48:53,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:48:53,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:48:53,171 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:48:53,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13ef55d8-de84-4961-b2a9-e1262748d0ee/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-16 19:48:53,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 19:48:53,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:48:53,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 19:48:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:48:56,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:48:56,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 19 [2022-11-16 19:48:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:56,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:48:57,752 INFO L321 Elim1Store]: treesize reduction 216, result has 4.0 percent of original size [2022-11-16 19:48:57,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 91 treesize of output 29 [2022-11-16 19:48:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:48:59,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934672904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:48:59,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-16 19:48:59,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 9, 9, 8, 8] total 36 [2022-11-16 19:48:59,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854414852] [2022-11-16 19:48:59,807 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-16 19:48:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 19:48:59,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-16 19:48:59,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 19:48:59,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1123, Unknown=22, NotChecked=0, Total=1406 [2022-11-16 19:48:59,808 INFO L87 Difference]: Start difference. First operand 337 states and 987 transitions. Second operand has 38 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)