./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b 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_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9 --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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --- 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-6b4ec56 [2022-11-20 21:02:01,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:02:01,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:02:01,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:02:01,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:02:01,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:02:01,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:02:01,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:02:01,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:02:01,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:02:01,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:02:01,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:02:01,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:02:01,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:02:01,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:02:01,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:02:01,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:02:01,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:02:01,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:02:01,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:02:01,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:02:01,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:02:01,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:02:01,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:02:01,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:02:01,611 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:02:01,611 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:02:01,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:02:01,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:02:01,613 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:02:01,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:02:01,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:02:01,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:02:01,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:02:01,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:02:01,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:02:01,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:02:01,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:02:01,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:02:01,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:02:01,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:02:01,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 21:02:01,646 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:02:01,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:02:01,647 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:02:01,647 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:02:01,648 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:02:01,648 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:02:01,648 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:02:01,649 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:02:01,649 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:02:01,649 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:02:01,649 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:02:01,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:02:01,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:02:01,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:02:01,650 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:02:01,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:02:01,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:02:01,651 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:02:01,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:02:01,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:02:01,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:02:01,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:02:01,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:02:01,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:02:01,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:02:01,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:02:01,653 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:02:01,653 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:02:01,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:02:01,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:02:01,654 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:02:01,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:02:01,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:02:01,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:02:01,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:02:01,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:02:01,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:02:01,655 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:02:01,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:02:01,655 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:02:01,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:02:01,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:02:01,656 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_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b [2022-11-20 21:02:01,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:02:01,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:02:01,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:02:01,943 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:02:01,947 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:02:01,948 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2022-11-20 21:02:05,157 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:02:05,389 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:02:05,390 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2022-11-20 21:02:05,397 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/6a6802198/97012d97f4874154a602926fa87c3ace/FLAG1013d6826 [2022-11-20 21:02:05,411 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/6a6802198/97012d97f4874154a602926fa87c3ace [2022-11-20 21:02:05,414 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:02:05,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:02:05,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:05,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:02:05,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:02:05,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:05" (1/1) ... [2022-11-20 21:02:05,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10069b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:05, skipping insertion in model container [2022-11-20 21:02:05,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:05" (1/1) ... [2022-11-20 21:02:05,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:02:05,448 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:02:05,641 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2022-11-20 21:02:05,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:05,665 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) [2022-11-20 21:02:05,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b1e55c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:05, skipping insertion in model container [2022-11-20 21:02:05,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:05,666 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 21:02:05,668 INFO L158 Benchmark]: Toolchain (without parser) took 251.68ms. Allocated memory is still 201.3MB. Free memory was 156.4MB in the beginning and 145.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:02:05,668 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 146.8MB. Free memory is still 88.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:02:05,669 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.29ms. Allocated memory is still 201.3MB. Free memory was 155.7MB in the beginning and 145.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-20 21:02:05,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 146.8MB. Free memory is still 88.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.29ms. Allocated memory is still 201.3MB. Free memory was 155.7MB in the beginning and 145.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 159]: 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_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9 --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 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b --- 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-6b4ec56 [2022-11-20 21:02:07,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:02:07,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:02:08,000 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:02:08,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:02:08,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:02:08,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:02:08,010 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:02:08,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:02:08,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:02:08,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:02:08,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:02:08,023 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:02:08,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:02:08,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:02:08,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:02:08,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:02:08,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:02:08,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:02:08,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:02:08,045 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:02:08,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:02:08,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:02:08,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:02:08,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:02:08,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:02:08,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:02:08,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:02:08,063 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:02:08,065 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:02:08,065 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:02:08,066 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:02:08,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:02:08,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:02:08,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:02:08,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:02:08,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:02:08,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:02:08,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:02:08,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:02:08,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:02:08,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 21:02:08,132 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:02:08,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:02:08,133 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:02:08,133 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:02:08,134 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:02:08,134 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:02:08,134 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:02:08,135 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:02:08,135 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:02:08,135 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:02:08,136 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:02:08,136 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:02:08,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:02:08,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:02:08,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:02:08,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:02:08,138 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:02:08,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:02:08,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:02:08,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:02:08,139 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:02:08,139 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:02:08,139 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 21:02:08,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:02:08,139 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:02:08,140 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 21:02:08,140 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 21:02:08,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:02:08,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:02:08,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:02:08,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 21:02:08,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:02:08,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:02:08,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:02:08,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:02:08,142 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 21:02:08,142 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 21:02:08,142 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:02:08,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 21:02:08,143 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_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 841ea5a5ca051cc33dfe29d877ccdea4b63526a0ee61a2de18869a9ba1858c4b [2022-11-20 21:02:08,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:02:08,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:02:08,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:02:08,558 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:02:08,558 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:02:08,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2022-11-20 21:02:11,632 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:02:11,864 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:02:11,864 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2022-11-20 21:02:11,877 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/2e1ec8ca8/77c719f38160436587d6168ea8061555/FLAG6d0e9301b [2022-11-20 21:02:11,903 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/data/2e1ec8ca8/77c719f38160436587d6168ea8061555 [2022-11-20 21:02:11,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:02:11,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:02:11,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:11,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:02:11,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:02:11,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:11" (1/1) ... [2022-11-20 21:02:11,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653c1af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:11, skipping insertion in model container [2022-11-20 21:02:11,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:02:11" (1/1) ... [2022-11-20 21:02:11,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:02:11,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:02:12,172 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2022-11-20 21:02:12,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:12,215 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 21:02:12,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:02:12,258 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2022-11-20 21:02:12,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:12,285 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:02:12,330 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c[4007,4020] [2022-11-20 21:02:12,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:02:12,353 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:02:12,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12 WrapperNode [2022-11-20 21:02:12,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:02:12,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:02:12,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:02:12,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:02:12,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,440 INFO L138 Inliner]: procedures = 28, calls = 73, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 260 [2022-11-20 21:02:12,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:02:12,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:02:12,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:02:12,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:02:12,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,484 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,491 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:02:12,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:02:12,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:02:12,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:02:12,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (1/1) ... [2022-11-20 21:02:12,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:02:12,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:02:12,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:02:12,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:02:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:02:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:02:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 21:02:12,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 21:02:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 21:02:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 21:02:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 21:02:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 21:02:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 21:02:12,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 21:02:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-20 21:02:12,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-20 21:02:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 21:02:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 21:02:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:02:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:02:12,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:02:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:02:12,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 21:02:12,589 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 21:02:12,760 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:02:12,762 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:02:13,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:02:13,608 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:02:13,608 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-20 21:02:13,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:02:13 BoogieIcfgContainer [2022-11-20 21:02:13,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:02:13,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:02:13,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:02:13,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:02:13,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:02:11" (1/3) ... [2022-11-20 21:02:13,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385e0ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:02:13, skipping insertion in model container [2022-11-20 21:02:13,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:02:12" (2/3) ... [2022-11-20 21:02:13,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385e0ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:02:13, skipping insertion in model container [2022-11-20 21:02:13,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:02:13" (3/3) ... [2022-11-20 21:02:13,619 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2022-11-20 21:02:13,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:02:13,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-20 21:02:13,639 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 21:02:13,730 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 21:02:13,778 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 21:02:13,792 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 259 places, 264 transitions, 560 flow [2022-11-20 21:02:13,795 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 259 places, 264 transitions, 560 flow [2022-11-20 21:02:13,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 264 transitions, 560 flow [2022-11-20 21:02:13,931 INFO L130 PetriNetUnfolder]: 18/260 cut-off events. [2022-11-20 21:02:13,931 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-20 21:02:13,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 260 events. 18/260 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 246 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 215. Up to 3 conditions per place. [2022-11-20 21:02:13,944 INFO L119 LiptonReduction]: Number of co-enabled transitions 3744 [2022-11-20 21:02:54,532 WARN L233 SmtUtils]: Spent 6.88s on a formula simplification. DAG size of input: 137 DAG size of output: 136 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:03:02,279 WARN L233 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-20 21:03:05,681 INFO L134 LiptonReduction]: Checked pairs total: 8780 [2022-11-20 21:03:05,681 INFO L136 LiptonReduction]: Total number of compositions: 277 [2022-11-20 21:03:05,689 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 70 transitions, 172 flow [2022-11-20 21:03:05,963 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5357 states, 5051 states have (on average 4.26192833102356) internal successors, (21527), 5356 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:05,989 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:03:05,994 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;@2849da2e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:03:05,995 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-20 21:03:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 5357 states, 5051 states have (on average 4.26192833102356) internal successors, (21527), 5356 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:03:06,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:06,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:03:06,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:06,031 INFO L85 PathProgramCache]: Analyzing trace with hash 35873, now seen corresponding path program 1 times [2022-11-20 21:03:06,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:06,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [149706070] [2022-11-20 21:03:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:06,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:06,059 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:03:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:06,653 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:03:06,654 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:03:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:06,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:06,689 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:06,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [149706070] [2022-11-20 21:03:06,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [149706070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:06,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:06,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:06,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456023447] [2022-11-20 21:03:06,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:06,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:06,741 INFO L87 Difference]: Start difference. First operand has 5357 states, 5051 states have (on average 4.26192833102356) internal successors, (21527), 5356 states have internal predecessors, (21527), 0 states have call successors, (0), 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) [2022-11-20 21:03:07,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:07,161 INFO L93 Difference]: Finished difference Result 5354 states and 21524 transitions. [2022-11-20 21:03:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:07,164 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 [2022-11-20 21:03:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:07,269 INFO L225 Difference]: With dead ends: 5354 [2022-11-20 21:03:07,270 INFO L226 Difference]: Without dead ends: 5354 [2022-11-20 21:03:07,270 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 [2022-11-20 21:03:07,281 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:07,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 4 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:03:07,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2022-11-20 21:03:07,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 5354. [2022-11-20 21:03:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 5051 states have (on average 4.261334389229855) internal successors, (21524), 5353 states have internal predecessors, (21524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:07,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 21524 transitions. [2022-11-20 21:03:07,825 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 21524 transitions. Word has length 2 [2022-11-20 21:03:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:07,825 INFO L495 AbstractCegarLoop]: Abstraction has 5354 states and 21524 transitions. [2022-11-20 21:03:07,826 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) [2022-11-20 21:03:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 21524 transitions. [2022-11-20 21:03:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 21:03:07,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:07,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 21:03:07,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 21:03:08,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:08,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:08,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:08,049 INFO L85 PathProgramCache]: Analyzing trace with hash 35874, now seen corresponding path program 1 times [2022-11-20 21:03:08,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:08,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815492922] [2022-11-20 21:03:08,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:08,050 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 [2022-11-20 21:03:08,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:08,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:08,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:03:08,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:08,415 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:08,415 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:08,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:08,464 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:08,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815492922] [2022-11-20 21:03:08,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815492922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:08,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:08,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096197773] [2022-11-20 21:03:08,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:08,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:08,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:08,468 INFO L87 Difference]: Start difference. First operand 5354 states and 21524 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) [2022-11-20 21:03:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:09,397 INFO L93 Difference]: Finished difference Result 10705 states and 43045 transitions. [2022-11-20 21:03:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:09,398 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 [2022-11-20 21:03:09,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:09,575 INFO L225 Difference]: With dead ends: 10705 [2022-11-20 21:03:09,575 INFO L226 Difference]: Without dead ends: 10705 [2022-11-20 21:03:09,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:09,579 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:09,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 8 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:03:09,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2022-11-20 21:03:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 5356. [2022-11-20 21:03:10,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5356 states, 5053 states have (on average 4.260835147437166) internal successors, (21530), 5355 states have internal predecessors, (21530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5356 states to 5356 states and 21530 transitions. [2022-11-20 21:03:10,053 INFO L78 Accepts]: Start accepts. Automaton has 5356 states and 21530 transitions. Word has length 2 [2022-11-20 21:03:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:10,054 INFO L495 AbstractCegarLoop]: Abstraction has 5356 states and 21530 transitions. [2022-11-20 21:03:10,054 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) [2022-11-20 21:03:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5356 states and 21530 transitions. [2022-11-20 21:03:10,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:03:10,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:10,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:03:10,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:10,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:10,266 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:10,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1118831, now seen corresponding path program 1 times [2022-11-20 21:03:10,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:10,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759433504] [2022-11-20 21:03:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:10,267 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 [2022-11-20 21:03:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:10,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:10,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:10,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:03:10,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:10,645 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 21:03:10,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 21:03:11,975 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 21:03:11,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:12,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:12,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759433504] [2022-11-20 21:03:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759433504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:12,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:12,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110862124] [2022-11-20 21:03:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:12,203 INFO L87 Difference]: Start difference. First operand 5356 states and 21530 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) [2022-11-20 21:03:12,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:12,486 INFO L93 Difference]: Finished difference Result 5357 states and 21533 transitions. [2022-11-20 21:03:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:12,487 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 [2022-11-20 21:03:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:12,526 INFO L225 Difference]: With dead ends: 5357 [2022-11-20 21:03:12,527 INFO L226 Difference]: Without dead ends: 5357 [2022-11-20 21:03:12,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:12,528 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:12,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-11-20 21:03:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5357 states. [2022-11-20 21:03:12,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5357 to 5357. [2022-11-20 21:03:12,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5357 states, 5054 states have (on average 4.260585674713099) internal successors, (21533), 5356 states have internal predecessors, (21533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5357 states to 5357 states and 21533 transitions. [2022-11-20 21:03:12,785 INFO L78 Accepts]: Start accepts. Automaton has 5357 states and 21533 transitions. Word has length 3 [2022-11-20 21:03:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:12,785 INFO L495 AbstractCegarLoop]: Abstraction has 5357 states and 21533 transitions. [2022-11-20 21:03:12,785 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) [2022-11-20 21:03:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5357 states and 21533 transitions. [2022-11-20 21:03:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:03:12,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:12,787 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:03:12,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:12,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:12,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:12,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1118832, now seen corresponding path program 1 times [2022-11-20 21:03:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:13,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040141810] [2022-11-20 21:03:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:13,000 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 [2022-11-20 21:03:13,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:13,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:13,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:03:13,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:13,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,332 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 21:03:13,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-20 21:03:13,406 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-20 21:03:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 160 [2022-11-20 21:03:13,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:13,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:03:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:13,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:13,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040141810] [2022-11-20 21:03:13,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040141810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:13,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:13,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291789445] [2022-11-20 21:03:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:13,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:13,521 INFO L87 Difference]: Start difference. First operand 5357 states and 21533 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) [2022-11-20 21:03:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:13,846 INFO L93 Difference]: Finished difference Result 4600 states and 18128 transitions. [2022-11-20 21:03:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:13,847 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 [2022-11-20 21:03:13,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:13,879 INFO L225 Difference]: With dead ends: 4600 [2022-11-20 21:03:13,880 INFO L226 Difference]: Without dead ends: 4600 [2022-11-20 21:03:13,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:13,881 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:13,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 21:03:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2022-11-20 21:03:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 4600. [2022-11-20 21:03:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4343 states have (on average 4.1740732212756155) internal successors, (18128), 4599 states have internal predecessors, (18128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 18128 transitions. [2022-11-20 21:03:14,102 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 18128 transitions. Word has length 3 [2022-11-20 21:03:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:14,102 INFO L495 AbstractCegarLoop]: Abstraction has 4600 states and 18128 transitions. [2022-11-20 21:03:14,102 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) [2022-11-20 21:03:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 18128 transitions. [2022-11-20 21:03:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 21:03:14,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:14,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 21:03:14,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:14,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:14,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1116999, now seen corresponding path program 1 times [2022-11-20 21:03:14,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:14,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375796461] [2022-11-20 21:03:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:14,326 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 [2022-11-20 21:03:14,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:14,328 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:14,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:03:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:14,653 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:14,653 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:14,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375796461] [2022-11-20 21:03:15,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375796461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:15,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [366012938] [2022-11-20 21:03:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:15,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:03:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:03:15,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:03:15,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-20 21:03:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:03:15,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:15,423 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:15,424 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [366012938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:15,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077470929] [2022-11-20 21:03:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:15,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:15,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:15,549 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:15,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:03:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:03:15,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:15,869 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:15,869 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:15,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:16,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077470929] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:16,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:03:16,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-20 21:03:16,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558620498] [2022-11-20 21:03:16,087 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:16,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:03:16,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:16,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:03:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:03:16,088 INFO L87 Difference]: Start difference. First operand 4600 states and 18128 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) [2022-11-20 21:03:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:19,012 INFO L93 Difference]: Finished difference Result 18382 states and 72482 transitions. [2022-11-20 21:03:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:03:19,013 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 [2022-11-20 21:03:19,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:19,142 INFO L225 Difference]: With dead ends: 18382 [2022-11-20 21:03:19,142 INFO L226 Difference]: Without dead ends: 18382 [2022-11-20 21:03:19,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:03:19,143 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 430 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:19,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 24 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-20 21:03:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18382 states. [2022-11-20 21:03:19,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18382 to 4606. [2022-11-20 21:03:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 4349 states have (on average 4.171763623821568) internal successors, (18143), 4605 states have internal predecessors, (18143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 18143 transitions. [2022-11-20 21:03:19,487 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 18143 transitions. Word has length 3 [2022-11-20 21:03:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:19,488 INFO L495 AbstractCegarLoop]: Abstraction has 4606 states and 18143 transitions. [2022-11-20 21:03:19,488 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) [2022-11-20 21:03:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 18143 transitions. [2022-11-20 21:03:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:03:19,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:19,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:03:19,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:19,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:19,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:20,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 34682314, now seen corresponding path program 1 times [2022-11-20 21:03:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:20,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534262044] [2022-11-20 21:03:20,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:20,097 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 [2022-11-20 21:03:20,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:20,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-20 21:03:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:03:20,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:20,412 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 21:03:20,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 21:03:21,505 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 21:03:21,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:21,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:21,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:21,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534262044] [2022-11-20 21:03:21,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534262044] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:21,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:21,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531378470] [2022-11-20 21:03:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:21,819 INFO L87 Difference]: Start difference. First operand 4606 states and 18143 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) [2022-11-20 21:03:22,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:22,051 INFO L93 Difference]: Finished difference Result 4610 states and 18152 transitions. [2022-11-20 21:03:22,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:22,052 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 [2022-11-20 21:03:22,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:22,079 INFO L225 Difference]: With dead ends: 4610 [2022-11-20 21:03:22,079 INFO L226 Difference]: Without dead ends: 4610 [2022-11-20 21:03:22,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:22,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:22,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-20 21:03:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-11-20 21:03:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2022-11-20 21:03:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4353 states have (on average 4.169997702733747) internal successors, (18152), 4609 states have internal predecessors, (18152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 18152 transitions. [2022-11-20 21:03:22,234 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 18152 transitions. Word has length 4 [2022-11-20 21:03:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:22,235 INFO L495 AbstractCegarLoop]: Abstraction has 4610 states and 18152 transitions. [2022-11-20 21:03:22,235 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) [2022-11-20 21:03:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 18152 transitions. [2022-11-20 21:03:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 21:03:22,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:22,236 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 21:03:22,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:22,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:22,452 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash 34633706, now seen corresponding path program 1 times [2022-11-20 21:03:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:22,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832667289] [2022-11-20 21:03:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:22,453 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 [2022-11-20 21:03:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:22,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:22,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 21:03:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:22,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:03:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:22,746 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 21:03:22,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 21:03:23,893 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 21:03:23,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:24,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:24,099 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:24,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832667289] [2022-11-20 21:03:24,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832667289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:24,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:24,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:24,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957446488] [2022-11-20 21:03:24,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:24,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:24,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:24,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:24,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:24,101 INFO L87 Difference]: Start difference. First operand 4610 states and 18152 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) [2022-11-20 21:03:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:24,307 INFO L93 Difference]: Finished difference Result 4610 states and 18151 transitions. [2022-11-20 21:03:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:24,308 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 [2022-11-20 21:03:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:24,338 INFO L225 Difference]: With dead ends: 4610 [2022-11-20 21:03:24,338 INFO L226 Difference]: Without dead ends: 4610 [2022-11-20 21:03:24,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:24,340 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:24,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-20 21:03:24,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2022-11-20 21:03:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 4610. [2022-11-20 21:03:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4353 states have (on average 4.169767976108431) internal successors, (18151), 4609 states have internal predecessors, (18151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 18151 transitions. [2022-11-20 21:03:24,591 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 18151 transitions. Word has length 4 [2022-11-20 21:03:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:24,591 INFO L495 AbstractCegarLoop]: Abstraction has 4610 states and 18151 transitions. [2022-11-20 21:03:24,592 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) [2022-11-20 21:03:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 18151 transitions. [2022-11-20 21:03:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:03:24,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:24,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:03:24,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:24,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:24,804 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:24,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:24,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1075221777, now seen corresponding path program 1 times [2022-11-20 21:03:24,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:24,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814819368] [2022-11-20 21:03:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:24,806 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 [2022-11-20 21:03:24,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:24,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:24,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:03:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:24,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:25,113 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:03:25,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:03:25,564 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:03:25,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:03:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:25,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:25,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:25,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814819368] [2022-11-20 21:03:25,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814819368] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:25,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:25,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:25,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245511759] [2022-11-20 21:03:25,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:25,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:25,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:25,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:25,909 INFO L87 Difference]: Start difference. First operand 4610 states and 18151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:26,131 INFO L93 Difference]: Finished difference Result 4613 states and 18161 transitions. [2022-11-20 21:03:26,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:26,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:03:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:26,156 INFO L225 Difference]: With dead ends: 4613 [2022-11-20 21:03:26,157 INFO L226 Difference]: Without dead ends: 4613 [2022-11-20 21:03:26,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:26,158 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:26,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-11-20 21:03:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2022-11-20 21:03:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4613. [2022-11-20 21:03:26,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4356 states have (on average 4.16919191919192) internal successors, (18161), 4612 states have internal predecessors, (18161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 18161 transitions. [2022-11-20 21:03:26,347 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 18161 transitions. Word has length 5 [2022-11-20 21:03:26,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:26,348 INFO L495 AbstractCegarLoop]: Abstraction has 4613 states and 18161 transitions. [2022-11-20 21:03:26,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 18161 transitions. [2022-11-20 21:03:26,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:03:26,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:26,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:03:26,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:26,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:26,561 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:26,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1075221778, now seen corresponding path program 1 times [2022-11-20 21:03:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:26,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509265888] [2022-11-20 21:03:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:26,562 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 [2022-11-20 21:03:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:26,563 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:26,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:26,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:03:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:26,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:26,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:26,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:26,881 INFO L321 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2022-11-20 21:03:26,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 44 [2022-11-20 21:03:26,927 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-20 21:03:26,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 153 [2022-11-20 21:03:27,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:27,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:03:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:27,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:27,080 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509265888] [2022-11-20 21:03:27,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509265888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:27,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:27,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763556629] [2022-11-20 21:03:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:27,081 INFO L87 Difference]: Start difference. First operand 4613 states and 18161 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) [2022-11-20 21:03:27,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:27,375 INFO L93 Difference]: Finished difference Result 4481 states and 17706 transitions. [2022-11-20 21:03:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:03:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:27,401 INFO L225 Difference]: With dead ends: 4481 [2022-11-20 21:03:27,401 INFO L226 Difference]: Without dead ends: 4481 [2022-11-20 21:03:27,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:27,402 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:27,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 4 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 21:03:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4481 states. [2022-11-20 21:03:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4481 to 4481. [2022-11-20 21:03:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4481 states, 4242 states have (on average 4.173974540311174) internal successors, (17706), 4480 states have internal predecessors, (17706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4481 states to 4481 states and 17706 transitions. [2022-11-20 21:03:27,582 INFO L78 Accepts]: Start accepts. Automaton has 4481 states and 17706 transitions. Word has length 5 [2022-11-20 21:03:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:27,583 INFO L495 AbstractCegarLoop]: Abstraction has 4481 states and 17706 transitions. [2022-11-20 21:03:27,583 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) [2022-11-20 21:03:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4481 states and 17706 transitions. [2022-11-20 21:03:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 21:03:27,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:27,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 21:03:27,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:27,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:27,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:27,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1073643439, now seen corresponding path program 1 times [2022-11-20 21:03:27,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:27,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401737318] [2022-11-20 21:03:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:27,796 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 [2022-11-20 21:03:27,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:27,797 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:27,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:03:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:28,159 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-20 21:03:28,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-20 21:03:29,357 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-20 21:03:29,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:03:29,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:29,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:29,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401737318] [2022-11-20 21:03:29,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401737318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:29,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:29,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:29,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924324349] [2022-11-20 21:03:29,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:29,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:29,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:29,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:29,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:29,621 INFO L87 Difference]: Start difference. First operand 4481 states and 17706 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:29,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:29,816 INFO L93 Difference]: Finished difference Result 4480 states and 17702 transitions. [2022-11-20 21:03:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 21:03:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:29,837 INFO L225 Difference]: With dead ends: 4480 [2022-11-20 21:03:29,837 INFO L226 Difference]: Without dead ends: 4480 [2022-11-20 21:03:29,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:29,838 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:29,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 21:03:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4480 states. [2022-11-20 21:03:29,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4480 to 4476. [2022-11-20 21:03:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4476 states, 4238 states have (on average 4.174846625766871) internal successors, (17693), 4475 states have internal predecessors, (17693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4476 states to 4476 states and 17693 transitions. [2022-11-20 21:03:29,973 INFO L78 Accepts]: Start accepts. Automaton has 4476 states and 17693 transitions. Word has length 5 [2022-11-20 21:03:29,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:29,974 INFO L495 AbstractCegarLoop]: Abstraction has 4476 states and 17693 transitions. [2022-11-20 21:03:29,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:29,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4476 states and 17693 transitions. [2022-11-20 21:03:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:03:29,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:29,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:03:29,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:30,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:30,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:30,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1030009428, now seen corresponding path program 1 times [2022-11-20 21:03:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:30,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610560179] [2022-11-20 21:03:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:30,188 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 [2022-11-20 21:03:30,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:30,189 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:30,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:03:30,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:30,519 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:03:30,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:03:31,425 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:03:31,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:31,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:31,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:31,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610560179] [2022-11-20 21:03:31,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610560179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:31,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:31,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:31,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128731263] [2022-11-20 21:03:31,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:31,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:31,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:31,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:31,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:31,802 INFO L87 Difference]: Start difference. First operand 4476 states and 17693 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:31,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:31,994 INFO L93 Difference]: Finished difference Result 4483 states and 17710 transitions. [2022-11-20 21:03:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:31,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:03:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:32,013 INFO L225 Difference]: With dead ends: 4483 [2022-11-20 21:03:32,013 INFO L226 Difference]: Without dead ends: 4483 [2022-11-20 21:03:32,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:32,014 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:32,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 21:03:32,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4483 states. [2022-11-20 21:03:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4483 to 4480. [2022-11-20 21:03:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4242 states have (on average 4.173031588873173) internal successors, (17702), 4479 states have internal predecessors, (17702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 17702 transitions. [2022-11-20 21:03:32,147 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 17702 transitions. Word has length 6 [2022-11-20 21:03:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:32,148 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 17702 transitions. [2022-11-20 21:03:32,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 17702 transitions. [2022-11-20 21:03:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:03:32,150 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:32,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:03:32,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:32,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:32,361 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:32,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:32,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1027870742, now seen corresponding path program 1 times [2022-11-20 21:03:32,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:32,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688905523] [2022-11-20 21:03:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:32,362 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 [2022-11-20 21:03:32,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:32,363 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:32,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:32,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:03:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:32,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:32,531 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:32,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688905523] [2022-11-20 21:03:32,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688905523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:32,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:32,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:03:32,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97356341] [2022-11-20 21:03:32,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:32,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:03:32,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:32,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:03:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:32,534 INFO L87 Difference]: Start difference. First operand 4480 states and 17702 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:32,992 INFO L93 Difference]: Finished difference Result 5569 states and 21334 transitions. [2022-11-20 21:03:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:03:32,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:03:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:33,018 INFO L225 Difference]: With dead ends: 5569 [2022-11-20 21:03:33,018 INFO L226 Difference]: Without dead ends: 5563 [2022-11-20 21:03:33,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:03:33,018 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:33,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 12 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:03:33,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5563 states. [2022-11-20 21:03:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5563 to 5379. [2022-11-20 21:03:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5379 states, 5127 states have (on average 4.07626292178662) internal successors, (20899), 5378 states have internal predecessors, (20899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5379 states to 5379 states and 20899 transitions. [2022-11-20 21:03:33,182 INFO L78 Accepts]: Start accepts. Automaton has 5379 states and 20899 transitions. Word has length 6 [2022-11-20 21:03:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:33,183 INFO L495 AbstractCegarLoop]: Abstraction has 5379 states and 20899 transitions. [2022-11-20 21:03:33,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 5379 states and 20899 transitions. [2022-11-20 21:03:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:03:33,186 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:33,186 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:03:33,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:03:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:33,399 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1076721716, now seen corresponding path program 1 times [2022-11-20 21:03:33,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:33,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584411924] [2022-11-20 21:03:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:33,401 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 [2022-11-20 21:03:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:33,402 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:33,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-20 21:03:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:33,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:03:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:03:33,712 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:03:33,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:03:34,620 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:03:34,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:03:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:03:34,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:03:34,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:34,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584411924] [2022-11-20 21:03:34,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584411924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:34,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:34,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:03:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44840548] [2022-11-20 21:03:34,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:34,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:34,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:34,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:34,836 INFO L87 Difference]: Start difference. First operand 5379 states and 20899 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:35,008 INFO L93 Difference]: Finished difference Result 5385 states and 20913 transitions. [2022-11-20 21:03:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:35,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:03:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:35,031 INFO L225 Difference]: With dead ends: 5385 [2022-11-20 21:03:35,031 INFO L226 Difference]: Without dead ends: 5385 [2022-11-20 21:03:35,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:35,032 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:35,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-11-20 21:03:35,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5385 states. [2022-11-20 21:03:35,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5385 to 5382. [2022-11-20 21:03:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5130 states have (on average 4.075438596491228) internal successors, (20907), 5381 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 20907 transitions. [2022-11-20 21:03:35,190 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 20907 transitions. Word has length 6 [2022-11-20 21:03:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:35,191 INFO L495 AbstractCegarLoop]: Abstraction has 5382 states and 20907 transitions. [2022-11-20 21:03:35,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:03:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 20907 transitions. [2022-11-20 21:03:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:03:35,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:35,192 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-20 21:03:35,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:35,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:03:35,404 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:03:35,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:35,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1078350494, now seen corresponding path program 2 times [2022-11-20 21:03:35,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:03:35,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361566184] [2022-11-20 21:03:35,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:03:35,405 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 [2022-11-20 21:03:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:03:35,406 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:03:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-20 21:03:35,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:03:35,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:03:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:03:35,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:35,746 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:35,746 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:35,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:36,612 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:03:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361566184] [2022-11-20 21:03:36,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361566184] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [387872772] [2022-11-20 21:03:36,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:03:36,612 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:03:36,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:03:36,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:03:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-20 21:03:36,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:03:36,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:03:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:03:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:37,073 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:37,074 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:37,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:38,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [387872772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:38,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444339907] [2022-11-20 21:03:38,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:03:38,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:38,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:38,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:38,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 21:03:38,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:03:38,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:03:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:03:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:38,414 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:03:38,414 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:03:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:38,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:38,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444339907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:38,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:03:38,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-20 21:03:38,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228036970] [2022-11-20 21:03:38,661 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:03:38,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 21:03:38,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:03:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 21:03:38,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:03:38,663 INFO L87 Difference]: Start difference. First operand 5382 states and 20907 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) [2022-11-20 21:03:42,123 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 [] [2022-11-20 21:03:43,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:45,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:46,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:51,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:03:53,835 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 [] [2022-11-20 21:04:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:00,983 INFO L93 Difference]: Finished difference Result 48283 states and 187854 transitions. [2022-11-20 21:04:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:04:00,984 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 [2022-11-20 21:04:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:01,256 INFO L225 Difference]: With dead ends: 48283 [2022-11-20 21:04:01,257 INFO L226 Difference]: Without dead ends: 48283 [2022-11-20 21:04:01,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:04:01,258 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1836 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 111 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1836 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:01,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1836 Valid, 148 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1873 Invalid, 2 Unknown, 0 Unchecked, 20.3s Time] [2022-11-20 21:04:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48283 states. [2022-11-20 21:04:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48283 to 5398. [2022-11-20 21:04:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5398 states, 5146 states have (on average 4.0689856198989505) internal successors, (20939), 5397 states have internal predecessors, (20939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5398 states to 5398 states and 20939 transitions. [2022-11-20 21:04:02,155 INFO L78 Accepts]: Start accepts. Automaton has 5398 states and 20939 transitions. Word has length 6 [2022-11-20 21:04:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:02,156 INFO L495 AbstractCegarLoop]: Abstraction has 5398 states and 20939 transitions. [2022-11-20 21:04:02,156 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) [2022-11-20 21:04:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 5398 states and 20939 transitions. [2022-11-20 21:04:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:02,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:02,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:02,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:02,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:02,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:02,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:02,764 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:02,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1799223931, now seen corresponding path program 1 times [2022-11-20 21:04:02,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:02,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134766371] [2022-11-20 21:04:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:02,765 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 [2022-11-20 21:04:02,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:02,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:02,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-20 21:04:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:02,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:04:02,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:03,030 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:04:03,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:04:03,959 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:04:03,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:04:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:04,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:04,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134766371] [2022-11-20 21:04:04,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134766371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:04,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:04,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570427562] [2022-11-20 21:04:04,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:04,367 INFO L87 Difference]: Start difference. First operand 5398 states and 20939 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:04,552 INFO L93 Difference]: Finished difference Result 5402 states and 20946 transitions. [2022-11-20 21:04:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:04,640 INFO L225 Difference]: With dead ends: 5402 [2022-11-20 21:04:04,640 INFO L226 Difference]: Without dead ends: 5402 [2022-11-20 21:04:04,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:04,641 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:04,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 21:04:04,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2022-11-20 21:04:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 5402. [2022-11-20 21:04:04,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5402 states, 5150 states have (on average 4.067184466019418) internal successors, (20946), 5401 states have internal predecessors, (20946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5402 states to 5402 states and 20946 transitions. [2022-11-20 21:04:04,875 INFO L78 Accepts]: Start accepts. Automaton has 5402 states and 20946 transitions. Word has length 7 [2022-11-20 21:04:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:04,876 INFO L495 AbstractCegarLoop]: Abstraction has 5402 states and 20946 transitions. [2022-11-20 21:04:04,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5402 states and 20946 transitions. [2022-11-20 21:04:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:04,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:04,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:04,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:05,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:05,079 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219374, now seen corresponding path program 1 times [2022-11-20 21:04:05,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:05,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523969610] [2022-11-20 21:04:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:05,081 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 [2022-11-20 21:04:05,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:05,082 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:05,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:05,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:04:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:05,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:05,351 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:04:05,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:04:05,758 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:04:05,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:04:05,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:05,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:05,895 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:05,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523969610] [2022-11-20 21:04:05,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523969610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:05,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:05,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:05,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016585897] [2022-11-20 21:04:05,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:05,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:05,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:05,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:05,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:05,897 INFO L87 Difference]: Start difference. First operand 5402 states and 20946 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:06,105 INFO L93 Difference]: Finished difference Result 5403 states and 20947 transitions. [2022-11-20 21:04:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:06,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:06,120 INFO L225 Difference]: With dead ends: 5403 [2022-11-20 21:04:06,120 INFO L226 Difference]: Without dead ends: 5403 [2022-11-20 21:04:06,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:06,121 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:06,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 21:04:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5403 states. [2022-11-20 21:04:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5403 to 5403. [2022-11-20 21:04:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5403 states, 5151 states have (on average 4.06658901184236) internal successors, (20947), 5402 states have internal predecessors, (20947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5403 states to 5403 states and 20947 transitions. [2022-11-20 21:04:06,262 INFO L78 Accepts]: Start accepts. Automaton has 5403 states and 20947 transitions. Word has length 7 [2022-11-20 21:04:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:06,263 INFO L495 AbstractCegarLoop]: Abstraction has 5403 states and 20947 transitions. [2022-11-20 21:04:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 5403 states and 20947 transitions. [2022-11-20 21:04:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:06,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:06,264 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:06,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:06,467 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:06,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1798965352, now seen corresponding path program 1 times [2022-11-20 21:04:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528629822] [2022-11-20 21:04:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:06,468 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 [2022-11-20 21:04:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:06,470 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:06,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-20 21:04:06,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:06,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:06,799 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:04:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:04:07,388 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:04:07,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:04:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:07,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:07,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:07,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528629822] [2022-11-20 21:04:07,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528629822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:07,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:07,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:07,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362800324] [2022-11-20 21:04:07,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:07,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:07,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:07,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:07,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,624 INFO L87 Difference]: Start difference. First operand 5403 states and 20947 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:07,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:07,822 INFO L93 Difference]: Finished difference Result 5407 states and 20961 transitions. [2022-11-20 21:04:07,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:07,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:07,845 INFO L225 Difference]: With dead ends: 5407 [2022-11-20 21:04:07,845 INFO L226 Difference]: Without dead ends: 5407 [2022-11-20 21:04:07,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:07,846 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:07,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-20 21:04:07,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2022-11-20 21:04:08,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5407. [2022-11-20 21:04:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5407 states, 5155 states have (on average 4.0661493695441315) internal successors, (20961), 5406 states have internal predecessors, (20961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 20961 transitions. [2022-11-20 21:04:08,054 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 20961 transitions. Word has length 7 [2022-11-20 21:04:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:08,055 INFO L495 AbstractCegarLoop]: Abstraction has 5407 states and 20961 transitions. [2022-11-20 21:04:08,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 20961 transitions. [2022-11-20 21:04:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:08,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:08,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:08,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:08,268 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:08,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:08,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1798965350, now seen corresponding path program 1 times [2022-11-20 21:04:08,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:08,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1631140927] [2022-11-20 21:04:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:08,269 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 [2022-11-20 21:04:08,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:08,270 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:08,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-20 21:04:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:08,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:04:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:08,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:08,658 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-20 21:04:08,658 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 3 case distinctions, treesize of input 18 treesize of output 53 [2022-11-20 21:04:08,689 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 152 treesize of output 144 [2022-11-20 21:04:08,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:08,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:04:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:08,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:08,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:08,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1631140927] [2022-11-20 21:04:08,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1631140927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:08,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:08,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40610318] [2022-11-20 21:04:08,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:08,840 INFO L87 Difference]: Start difference. First operand 5407 states and 20961 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:09,128 INFO L93 Difference]: Finished difference Result 5328 states and 20734 transitions. [2022-11-20 21:04:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:09,144 INFO L225 Difference]: With dead ends: 5328 [2022-11-20 21:04:09,144 INFO L226 Difference]: Without dead ends: 5328 [2022-11-20 21:04:09,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:09,145 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 21:04:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2022-11-20 21:04:09,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5328. [2022-11-20 21:04:09,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5328 states, 5095 states have (on average 4.069479882237488) internal successors, (20734), 5327 states have internal predecessors, (20734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:09,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5328 states to 5328 states and 20734 transitions. [2022-11-20 21:04:09,316 INFO L78 Accepts]: Start accepts. Automaton has 5328 states and 20734 transitions. Word has length 7 [2022-11-20 21:04:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:09,316 INFO L495 AbstractCegarLoop]: Abstraction has 5328 states and 20734 transitions. [2022-11-20 21:04:09,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5328 states and 20734 transitions. [2022-11-20 21:04:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:09,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:09,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:09,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:09,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:09,523 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash 979219025, now seen corresponding path program 1 times [2022-11-20 21:04:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:09,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [438762029] [2022-11-20 21:04:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:09,524 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 [2022-11-20 21:04:09,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:09,525 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:09,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:04:09,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:09,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:09,843 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:04:09,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:04:10,784 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:04:10,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:04:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:11,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:11,156 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:11,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [438762029] [2022-11-20 21:04:11,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [438762029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:11,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:11,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104309839] [2022-11-20 21:04:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:11,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:11,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:11,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:11,158 INFO L87 Difference]: Start difference. First operand 5328 states and 20734 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:11,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:11,316 INFO L93 Difference]: Finished difference Result 5328 states and 20737 transitions. [2022-11-20 21:04:11,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:11,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:11,332 INFO L225 Difference]: With dead ends: 5328 [2022-11-20 21:04:11,332 INFO L226 Difference]: Without dead ends: 5328 [2022-11-20 21:04:11,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:11,333 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:11,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-11-20 21:04:11,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2022-11-20 21:04:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 5325. [2022-11-20 21:04:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5325 states, 5092 states have (on average 4.07089552238806) internal successors, (20729), 5324 states have internal predecessors, (20729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:11,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5325 states to 5325 states and 20729 transitions. [2022-11-20 21:04:11,428 INFO L78 Accepts]: Start accepts. Automaton has 5325 states and 20729 transitions. Word has length 7 [2022-11-20 21:04:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:11,428 INFO L495 AbstractCegarLoop]: Abstraction has 5325 states and 20729 transitions. [2022-11-20 21:04:11,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5325 states and 20729 transitions. [2022-11-20 21:04:11,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:11,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:11,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:11,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:11,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:11,630 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:11,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:11,630 INFO L85 PathProgramCache]: Analyzing trace with hash 981357711, now seen corresponding path program 1 times [2022-11-20 21:04:11,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:11,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782047823] [2022-11-20 21:04:11,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:11,631 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:11,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:11,631 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:11,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-20 21:04:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:04:11,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:11,948 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:11,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:11,984 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:11,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:04:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:12,003 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:12,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782047823] [2022-11-20 21:04:12,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782047823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:12,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:12,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:12,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38712439] [2022-11-20 21:04:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:12,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:12,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:12,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:12,005 INFO L87 Difference]: Start difference. First operand 5325 states and 20729 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:12,235 INFO L93 Difference]: Finished difference Result 4258 states and 16431 transitions. [2022-11-20 21:04:12,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:12,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:12,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:12,246 INFO L225 Difference]: With dead ends: 4258 [2022-11-20 21:04:12,247 INFO L226 Difference]: Without dead ends: 4258 [2022-11-20 21:04:12,247 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 [2022-11-20 21:04:12,247 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:12,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 4 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2022-11-20 21:04:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4258. [2022-11-20 21:04:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 4120 states have (on average 3.988106796116505) internal successors, (16431), 4257 states have internal predecessors, (16431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 16431 transitions. [2022-11-20 21:04:12,331 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 16431 transitions. Word has length 7 [2022-11-20 21:04:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:12,332 INFO L495 AbstractCegarLoop]: Abstraction has 4258 states and 16431 transitions. [2022-11-20 21:04:12,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 16431 transitions. [2022-11-20 21:04:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:12,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:12,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:12,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:12,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:12,537 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:12,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 981357712, now seen corresponding path program 1 times [2022-11-20 21:04:12,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1387895728] [2022-11-20 21:04:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:12,539 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 [2022-11-20 21:04:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:12,540 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:12,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-20 21:04:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:04:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:12,999 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:04:13,000 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:04:13,254 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:13,255 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:13,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:13,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:13,435 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:13,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:04:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:13,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:16,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:16,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1387895728] [2022-11-20 21:04:16,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1387895728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:16,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774020616] [2022-11-20 21:04:16,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:16,924 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:16,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:04:16,931 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:04:16,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-20 21:04:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:17,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:04:17,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:17,450 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:04:17,451 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:04:17,696 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:17,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:17,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:17,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:17,887 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:17,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:04:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:17,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:31,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774020616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:31,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675337395] [2022-11-20 21:04:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:31,581 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 21:04:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:04:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:32,060 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:04:32,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:04:32,365 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:32,365 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:32,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:32,527 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:32,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:04:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:32,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:33,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675337395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:33,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:04:33,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-20 21:04:33,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556806589] [2022-11-20 21:04:33,251 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:33,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:04:33,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:04:33,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=88, Unknown=2, NotChecked=0, Total=132 [2022-11-20 21:04:33,252 INFO L87 Difference]: Start difference. First operand 4258 states and 16431 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:33,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:33,693 INFO L93 Difference]: Finished difference Result 4266 states and 16447 transitions. [2022-11-20 21:04:33,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:04:33,693 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2022-11-20 21:04:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:33,704 INFO L225 Difference]: With dead ends: 4266 [2022-11-20 21:04:33,704 INFO L226 Difference]: Without dead ends: 4266 [2022-11-20 21:04:33,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=42, Invalid=88, Unknown=2, NotChecked=0, Total=132 [2022-11-20 21:04:33,705 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:33,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-11-20 21:04:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2022-11-20 21:04:33,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4262. [2022-11-20 21:04:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 4124 states have (on average 3.9861784675072744) internal successors, (16439), 4261 states have internal predecessors, (16439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 16439 transitions. [2022-11-20 21:04:33,791 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 16439 transitions. Word has length 7 [2022-11-20 21:04:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:33,791 INFO L495 AbstractCegarLoop]: Abstraction has 4262 states and 16439 transitions. [2022-11-20 21:04:33,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 16439 transitions. [2022-11-20 21:04:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:33,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:33,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:33,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-20 21:04:34,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:34,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:34,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:34,403 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:34,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1996815520, now seen corresponding path program 1 times [2022-11-20 21:04:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:34,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368120864] [2022-11-20 21:04:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:34,404 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 [2022-11-20 21:04:34,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:34,405 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:34,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:34,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:04:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:34,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:34,767 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:04:34,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:04:35,152 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:04:35,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:04:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:35,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:35,366 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:35,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368120864] [2022-11-20 21:04:35,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368120864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:35,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:35,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:35,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970878679] [2022-11-20 21:04:35,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:35,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:35,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:35,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:35,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:35,368 INFO L87 Difference]: Start difference. First operand 4262 states and 16439 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:35,551 INFO L93 Difference]: Finished difference Result 4261 states and 16438 transitions. [2022-11-20 21:04:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:35,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:04:35,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:35,563 INFO L225 Difference]: With dead ends: 4261 [2022-11-20 21:04:35,563 INFO L226 Difference]: Without dead ends: 4261 [2022-11-20 21:04:35,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:35,564 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:35,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:04:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2022-11-20 21:04:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 4260. [2022-11-20 21:04:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4260 states, 4123 states have (on average 3.9866601988843073) internal successors, (16437), 4259 states have internal predecessors, (16437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:35,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4260 states to 4260 states and 16437 transitions. [2022-11-20 21:04:35,638 INFO L78 Accepts]: Start accepts. Automaton has 4260 states and 16437 transitions. Word has length 8 [2022-11-20 21:04:35,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:35,638 INFO L495 AbstractCegarLoop]: Abstraction has 4260 states and 16437 transitions. [2022-11-20 21:04:35,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4260 states and 16437 transitions. [2022-11-20 21:04:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:35,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:35,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:35,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:35,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:35,839 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1996810963, now seen corresponding path program 1 times [2022-11-20 21:04:35,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:35,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [977939339] [2022-11-20 21:04:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:35,840 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 [2022-11-20 21:04:35,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:35,841 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:35,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 21:04:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:36,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:04:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:36,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:36,227 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:04:36,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:04:36,641 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:04:36,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:04:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:36,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:36,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:36,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [977939339] [2022-11-20 21:04:36,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [977939339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:36,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:36,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:36,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326519299] [2022-11-20 21:04:36,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:36,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:36,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:36,854 INFO L87 Difference]: Start difference. First operand 4260 states and 16437 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:37,066 INFO L93 Difference]: Finished difference Result 4260 states and 16436 transitions. [2022-11-20 21:04:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:04:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:37,076 INFO L225 Difference]: With dead ends: 4260 [2022-11-20 21:04:37,077 INFO L226 Difference]: Without dead ends: 4260 [2022-11-20 21:04:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:37,077 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:37,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:04:37,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-11-20 21:04:37,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 4259. [2022-11-20 21:04:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4122 states have (on average 3.987142163998059) internal successors, (16435), 4258 states have internal predecessors, (16435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 16435 transitions. [2022-11-20 21:04:37,162 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 16435 transitions. Word has length 8 [2022-11-20 21:04:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:37,162 INFO L495 AbstractCegarLoop]: Abstraction has 4259 states and 16435 transitions. [2022-11-20 21:04:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 16435 transitions. [2022-11-20 21:04:37,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:37,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:37,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:37,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:37,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:37,363 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:37,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1996556941, now seen corresponding path program 1 times [2022-11-20 21:04:37,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:37,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75681622] [2022-11-20 21:04:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:37,364 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:37,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:37,365 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:37,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-20 21:04:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:04:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:37,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:37,728 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:04:37,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:04:37,830 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:04:37,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:04:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:37,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:37,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:37,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75681622] [2022-11-20 21:04:37,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75681622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:37,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:37,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227247925] [2022-11-20 21:04:37,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:37,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:37,901 INFO L87 Difference]: Start difference. First operand 4259 states and 16435 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:38,078 INFO L93 Difference]: Finished difference Result 4257 states and 16428 transitions. [2022-11-20 21:04:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:38,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:04:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:38,091 INFO L225 Difference]: With dead ends: 4257 [2022-11-20 21:04:38,091 INFO L226 Difference]: Without dead ends: 4257 [2022-11-20 21:04:38,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:38,092 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:04:38,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2022-11-20 21:04:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 4250. [2022-11-20 21:04:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4113 states have (on average 3.989788475565281) internal successors, (16410), 4249 states have internal predecessors, (16410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 16410 transitions. [2022-11-20 21:04:38,183 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 16410 transitions. Word has length 8 [2022-11-20 21:04:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:38,184 INFO L495 AbstractCegarLoop]: Abstraction has 4250 states and 16410 transitions. [2022-11-20 21:04:38,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 16410 transitions. [2022-11-20 21:04:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:38,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:38,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:38,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:38,385 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash 66646974, now seen corresponding path program 1 times [2022-11-20 21:04:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431807357] [2022-11-20 21:04:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:38,386 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 [2022-11-20 21:04:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:38,387 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:38,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:38,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:04:38,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:38,727 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:04:38,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:04:39,381 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:04:39,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:04:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:39,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:39,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:39,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431807357] [2022-11-20 21:04:39,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431807357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:39,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:39,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:04:39,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404269754] [2022-11-20 21:04:39,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:39,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:39,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:04:39,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:39,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:39,658 INFO L87 Difference]: Start difference. First operand 4250 states and 16410 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:39,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:39,839 INFO L93 Difference]: Finished difference Result 4259 states and 16435 transitions. [2022-11-20 21:04:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:39,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:04:39,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:39,851 INFO L225 Difference]: With dead ends: 4259 [2022-11-20 21:04:39,851 INFO L226 Difference]: Without dead ends: 4259 [2022-11-20 21:04:39,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:39,852 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:39,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:04:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2022-11-20 21:04:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 4259. [2022-11-20 21:04:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4259 states, 4122 states have (on average 3.987142163998059) internal successors, (16435), 4258 states have internal predecessors, (16435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4259 states to 4259 states and 16435 transitions. [2022-11-20 21:04:39,925 INFO L78 Accepts]: Start accepts. Automaton has 4259 states and 16435 transitions. Word has length 8 [2022-11-20 21:04:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:39,925 INFO L495 AbstractCegarLoop]: Abstraction has 4259 states and 16435 transitions. [2022-11-20 21:04:39,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 4259 states and 16435 transitions. [2022-11-20 21:04:39,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:39,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:39,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:39,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:40,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:40,126 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:04:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 291011243, now seen corresponding path program 1 times [2022-11-20 21:04:40,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:04:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876121254] [2022-11-20 21:04:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:40,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:04:40,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:04:40,128 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:04:40,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:04:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:04:40,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:40,632 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:04:40,632 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:04:40,934 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:40,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:41,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:41,110 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:41,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:04:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:41,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:47,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:04:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876121254] [2022-11-20 21:04:47,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876121254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:47,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836241751] [2022-11-20 21:04:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:47,999 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:04:47,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:04:48,000 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:04:48,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 21:04:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:04:48,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:48,655 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:04:48,655 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:04:48,957 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:04:48,957 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:04:49,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:04:49,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:04:49,197 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:04:49,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:04:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:04:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:01,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [836241751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:01,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209569380] [2022-11-20 21:05:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:01,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:01,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:01,095 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:01,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 21:05:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:01,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:05:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:01,571 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:01,572 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:01,876 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:01,877 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:02,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:02,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:02,069 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:02,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:02,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209569380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:05,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:05,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-20 21:05:05,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250130040] [2022-11-20 21:05:05,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:05,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:05:05,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:05,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:05:05,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=88, Unknown=2, NotChecked=0, Total=132 [2022-11-20 21:05:05,699 INFO L87 Difference]: Start difference. First operand 4259 states and 16435 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:05,928 INFO L93 Difference]: Finished difference Result 4287 states and 16493 transitions. [2022-11-20 21:05:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:05:05,929 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:05:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:05,942 INFO L225 Difference]: With dead ends: 4287 [2022-11-20 21:05:05,942 INFO L226 Difference]: Without dead ends: 4287 [2022-11-20 21:05:05,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=42, Invalid=88, Unknown=2, NotChecked=0, Total=132 [2022-11-20 21:05:05,943 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:05,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-11-20 21:05:05,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4287 states. [2022-11-20 21:05:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4287 to 4268. [2022-11-20 21:05:06,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4268 states, 4131 states have (on average 3.983054950375212) internal successors, (16454), 4267 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4268 states to 4268 states and 16454 transitions. [2022-11-20 21:05:06,050 INFO L78 Accepts]: Start accepts. Automaton has 4268 states and 16454 transitions. Word has length 8 [2022-11-20 21:05:06,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:06,050 INFO L495 AbstractCegarLoop]: Abstraction has 4268 states and 16454 transitions. [2022-11-20 21:05:06,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 4268 states and 16454 transitions. [2022-11-20 21:05:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:05:06,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:06,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:06,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:06,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:06,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:05:06,660 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:06,660 INFO L85 PathProgramCache]: Analyzing trace with hash 357315968, now seen corresponding path program 1 times [2022-11-20 21:05:06,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:06,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137210049] [2022-11-20 21:05:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:06,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:06,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:06,662 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:06,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:06,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:05:06,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:07,016 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:05:07,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:05:08,115 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:05:08,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:08,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:08,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:08,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137210049] [2022-11-20 21:05:08,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137210049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:08,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:08,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:08,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714137343] [2022-11-20 21:05:08,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:08,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:08,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:08,678 INFO L87 Difference]: Start difference. First operand 4268 states and 16454 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:08,877 INFO L93 Difference]: Finished difference Result 4276 states and 16470 transitions. [2022-11-20 21:05:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:05:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:08,889 INFO L225 Difference]: With dead ends: 4276 [2022-11-20 21:05:08,889 INFO L226 Difference]: Without dead ends: 4276 [2022-11-20 21:05:08,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:08,890 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:08,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-20 21:05:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2022-11-20 21:05:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4275. [2022-11-20 21:05:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 4138 states have (on average 3.9799420009666506) internal successors, (16469), 4274 states have internal predecessors, (16469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 16469 transitions. [2022-11-20 21:05:08,971 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 16469 transitions. Word has length 8 [2022-11-20 21:05:08,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:08,971 INFO L495 AbstractCegarLoop]: Abstraction has 4275 states and 16469 transitions. [2022-11-20 21:05:08,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 16469 transitions. [2022-11-20 21:05:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:05:08,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:08,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:08,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:09,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:09,172 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash 357320525, now seen corresponding path program 1 times [2022-11-20 21:05:09,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:09,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760223313] [2022-11-20 21:05:09,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:09,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:09,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:09,174 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:09,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 21:05:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:05:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:09,534 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:05:09,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:05:10,619 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:05:10,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:11,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:11,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:11,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760223313] [2022-11-20 21:05:11,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760223313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:11,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:11,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538331072] [2022-11-20 21:05:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:11,079 INFO L87 Difference]: Start difference. First operand 4275 states and 16469 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:11,304 INFO L93 Difference]: Finished difference Result 4278 states and 16472 transitions. [2022-11-20 21:05:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:05:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:11,320 INFO L225 Difference]: With dead ends: 4278 [2022-11-20 21:05:11,320 INFO L226 Difference]: Without dead ends: 4278 [2022-11-20 21:05:11,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:11,321 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:11,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-20 21:05:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2022-11-20 21:05:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 4277. [2022-11-20 21:05:11,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4277 states, 4140 states have (on average 3.9785024154589372) internal successors, (16471), 4276 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4277 states to 4277 states and 16471 transitions. [2022-11-20 21:05:11,430 INFO L78 Accepts]: Start accepts. Automaton has 4277 states and 16471 transitions. Word has length 8 [2022-11-20 21:05:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:11,431 INFO L495 AbstractCegarLoop]: Abstraction has 4277 states and 16471 transitions. [2022-11-20 21:05:11,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4277 states and 16471 transitions. [2022-11-20 21:05:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:05:11,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:11,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:11,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:11,644 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 357320026, now seen corresponding path program 1 times [2022-11-20 21:05:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:11,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [274153094] [2022-11-20 21:05:11,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:11,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:11,645 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:11,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-20 21:05:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:11,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:05:11,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:12,137 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:12,137 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:12,450 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:12,450 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:12,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:12,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:12,629 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:12,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:12,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:15,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:15,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [274153094] [2022-11-20 21:05:15,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [274153094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:15,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198620864] [2022-11-20 21:05:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:15,962 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:05:15,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:05:15,963 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:05:15,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-20 21:05:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:05:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:16,694 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:16,695 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:16,998 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:16,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:17,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:17,270 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:17,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:17,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:20,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198620864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:20,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679497077] [2022-11-20 21:05:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:20,482 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:20,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 21:05:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:20,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:05:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:20,986 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:20,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:21,306 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:21,307 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:21,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:21,443 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:21,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:21,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:21,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:23,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679497077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:23,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:23,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-20 21:05:23,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921008067] [2022-11-20 21:05:23,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:23,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:05:23,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:23,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:05:23,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:05:23,821 INFO L87 Difference]: Start difference. First operand 4277 states and 16471 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-20 21:05:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:24,502 INFO L93 Difference]: Finished difference Result 4285 states and 16489 transitions. [2022-11-20 21:05:24,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:05:24,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 8 [2022-11-20 21:05:24,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:24,514 INFO L225 Difference]: With dead ends: 4285 [2022-11-20 21:05:24,514 INFO L226 Difference]: Without dead ends: 4285 [2022-11-20 21:05:24,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:05:24,515 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 102 Unchecked, 0.6s Time] [2022-11-20 21:05:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-11-20 21:05:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4279. [2022-11-20 21:05:24,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4279 states, 4142 states have (on average 3.9777885079671655) internal successors, (16476), 4278 states have internal predecessors, (16476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 16476 transitions. [2022-11-20 21:05:24,592 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 16476 transitions. Word has length 8 [2022-11-20 21:05:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:24,592 INFO L495 AbstractCegarLoop]: Abstraction has 4279 states and 16476 transitions. [2022-11-20 21:05:24,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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) [2022-11-20 21:05:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 16476 transitions. [2022-11-20 21:05:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:05:24,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:24,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:24,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:24,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:25,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:25,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:25,194 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:25,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:25,194 INFO L85 PathProgramCache]: Analyzing trace with hash 357574547, now seen corresponding path program 1 times [2022-11-20 21:05:25,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:25,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972405106] [2022-11-20 21:05:25,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:25,195 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 [2022-11-20 21:05:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:25,200 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:25,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-20 21:05:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:25,592 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:05:25,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:05:26,341 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:05:26,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:26,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:26,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:26,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972405106] [2022-11-20 21:05:26,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972405106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:26,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:26,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:26,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3378729] [2022-11-20 21:05:26,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:26,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:26,579 INFO L87 Difference]: Start difference. First operand 4279 states and 16476 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:26,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:26,769 INFO L93 Difference]: Finished difference Result 4285 states and 16493 transitions. [2022-11-20 21:05:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:26,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 21:05:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:26,781 INFO L225 Difference]: With dead ends: 4285 [2022-11-20 21:05:26,781 INFO L226 Difference]: Without dead ends: 4285 [2022-11-20 21:05:26,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:26,782 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:26,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-20 21:05:26,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2022-11-20 21:05:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4285. [2022-11-20 21:05:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4285 states, 4148 states have (on average 3.9761330761812923) internal successors, (16493), 4284 states have internal predecessors, (16493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4285 states to 4285 states and 16493 transitions. [2022-11-20 21:05:26,866 INFO L78 Accepts]: Start accepts. Automaton has 4285 states and 16493 transitions. Word has length 8 [2022-11-20 21:05:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:26,866 INFO L495 AbstractCegarLoop]: Abstraction has 4285 states and 16493 transitions. [2022-11-20 21:05:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4285 states and 16493 transitions. [2022-11-20 21:05:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:26,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:26,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:26,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:27,071 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:27,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1763724989, now seen corresponding path program 1 times [2022-11-20 21:05:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:27,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311628811] [2022-11-20 21:05:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:27,072 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 [2022-11-20 21:05:27,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:27,073 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:27,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:05:27,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:27,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:27,464 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:05:27,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:05:28,151 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:05:28,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:28,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:28,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:28,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311628811] [2022-11-20 21:05:28,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311628811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:28,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:28,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:28,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817458215] [2022-11-20 21:05:28,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:28,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:28,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:28,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:28,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:28,482 INFO L87 Difference]: Start difference. First operand 4285 states and 16493 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:28,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:28,661 INFO L93 Difference]: Finished difference Result 4283 states and 16486 transitions. [2022-11-20 21:05:28,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:28,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:28,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:28,673 INFO L225 Difference]: With dead ends: 4283 [2022-11-20 21:05:28,673 INFO L226 Difference]: Without dead ends: 4283 [2022-11-20 21:05:28,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:28,674 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:28,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:05:28,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4283 states. [2022-11-20 21:05:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4283 to 4274. [2022-11-20 21:05:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4274 states, 4137 states have (on average 3.97897026831037) internal successors, (16461), 4273 states have internal predecessors, (16461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4274 states to 4274 states and 16461 transitions. [2022-11-20 21:05:28,752 INFO L78 Accepts]: Start accepts. Automaton has 4274 states and 16461 transitions. Word has length 9 [2022-11-20 21:05:28,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:28,752 INFO L495 AbstractCegarLoop]: Abstraction has 4274 states and 16461 transitions. [2022-11-20 21:05:28,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 4274 states and 16461 transitions. [2022-11-20 21:05:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:28,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:28,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:28,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:28,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:28,955 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1817647884, now seen corresponding path program 1 times [2022-11-20 21:05:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:28,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302694883] [2022-11-20 21:05:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:28,956 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 [2022-11-20 21:05:28,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:28,957 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:28,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-20 21:05:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:29,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:29,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:29,321 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:05:29,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:05:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:29,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:05:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:29,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:29,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:29,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302694883] [2022-11-20 21:05:29,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302694883] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:29,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:29,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:29,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129414753] [2022-11-20 21:05:29,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:29,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:29,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:29,557 INFO L87 Difference]: Start difference. First operand 4274 states and 16461 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:29,850 INFO L93 Difference]: Finished difference Result 4286 states and 16488 transitions. [2022-11-20 21:05:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:29,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:29,862 INFO L225 Difference]: With dead ends: 4286 [2022-11-20 21:05:29,862 INFO L226 Difference]: Without dead ends: 4286 [2022-11-20 21:05:29,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:29,863 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:29,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-20 21:05:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2022-11-20 21:05:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 4286. [2022-11-20 21:05:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4286 states, 4149 states have (on average 3.9739696312364425) internal successors, (16488), 4285 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 16488 transitions. [2022-11-20 21:05:29,936 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 16488 transitions. Word has length 9 [2022-11-20 21:05:29,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:29,937 INFO L495 AbstractCegarLoop]: Abstraction has 4286 states and 16488 transitions. [2022-11-20 21:05:29,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 16488 transitions. [2022-11-20 21:05:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:29,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:29,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:29,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:30,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:30,138 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:30,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1822027161, now seen corresponding path program 1 times [2022-11-20 21:05:30,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:30,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358621942] [2022-11-20 21:05:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:30,139 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 [2022-11-20 21:05:30,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:30,140 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:30,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-20 21:05:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:30,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:30,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:30,496 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:05:30,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:05:31,196 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:05:31,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:31,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:31,685 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358621942] [2022-11-20 21:05:31,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358621942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:31,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:31,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346186856] [2022-11-20 21:05:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:31,687 INFO L87 Difference]: Start difference. First operand 4286 states and 16488 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:31,884 INFO L93 Difference]: Finished difference Result 4289 states and 16492 transitions. [2022-11-20 21:05:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:31,896 INFO L225 Difference]: With dead ends: 4289 [2022-11-20 21:05:31,896 INFO L226 Difference]: Without dead ends: 4289 [2022-11-20 21:05:31,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:31,896 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:31,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-20 21:05:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2022-11-20 21:05:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 4289. [2022-11-20 21:05:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4289 states, 4152 states have (on average 3.9720616570327554) internal successors, (16492), 4288 states have internal predecessors, (16492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:31,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4289 states to 4289 states and 16492 transitions. [2022-11-20 21:05:31,972 INFO L78 Accepts]: Start accepts. Automaton has 4289 states and 16492 transitions. Word has length 9 [2022-11-20 21:05:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:31,973 INFO L495 AbstractCegarLoop]: Abstraction has 4289 states and 16492 transitions. [2022-11-20 21:05:31,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:31,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4289 states and 16492 transitions. [2022-11-20 21:05:31,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:31,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:31,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:31,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:32,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:32,175 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2066056991, now seen corresponding path program 1 times [2022-11-20 21:05:32,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:32,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434340680] [2022-11-20 21:05:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:32,176 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 [2022-11-20 21:05:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:32,177 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:32,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:32,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:05:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:32,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:32,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:32,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434340680] [2022-11-20 21:05:32,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434340680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:32,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:32,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:05:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129124233] [2022-11-20 21:05:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:32,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:32,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:32,366 INFO L87 Difference]: Start difference. First operand 4289 states and 16492 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:32,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:32,958 INFO L93 Difference]: Finished difference Result 4688 states and 17449 transitions. [2022-11-20 21:05:32,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:32,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:32,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:32,972 INFO L225 Difference]: With dead ends: 4688 [2022-11-20 21:05:32,972 INFO L226 Difference]: Without dead ends: 4686 [2022-11-20 21:05:32,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:32,973 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:32,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 10 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:05:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2022-11-20 21:05:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 4056. [2022-11-20 21:05:33,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4056 states, 3913 states have (on average 3.981855353948377) internal successors, (15581), 4055 states have internal predecessors, (15581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4056 states to 4056 states and 15581 transitions. [2022-11-20 21:05:33,065 INFO L78 Accepts]: Start accepts. Automaton has 4056 states and 15581 transitions. Word has length 9 [2022-11-20 21:05:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:33,066 INFO L495 AbstractCegarLoop]: Abstraction has 4056 states and 15581 transitions. [2022-11-20 21:05:33,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4056 states and 15581 transitions. [2022-11-20 21:05:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:33,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:33,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:33,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:33,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:33,278 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:33,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2066144167, now seen corresponding path program 1 times [2022-11-20 21:05:33,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:33,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132695924] [2022-11-20 21:05:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:33,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:33,280 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:33,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 21:05:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:05:33,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:33,612 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-20 21:05:33,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 55 [2022-11-20 21:05:33,659 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:05:33,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:05:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:33,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:33,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132695924] [2022-11-20 21:05:33,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132695924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:33,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:33,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:33,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614309726] [2022-11-20 21:05:33,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:33,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:33,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:33,688 INFO L87 Difference]: Start difference. First operand 4056 states and 15581 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:33,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:33,926 INFO L93 Difference]: Finished difference Result 3754 states and 14418 transitions. [2022-11-20 21:05:33,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:33,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:33,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:33,938 INFO L225 Difference]: With dead ends: 3754 [2022-11-20 21:05:33,938 INFO L226 Difference]: Without dead ends: 3754 [2022-11-20 21:05:33,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:33,938 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:33,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 4 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:05:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-11-20 21:05:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3754. [2022-11-20 21:05:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3636 states have (on average 3.9653465346534653) internal successors, (14418), 3753 states have internal predecessors, (14418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 14418 transitions. [2022-11-20 21:05:34,019 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 14418 transitions. Word has length 9 [2022-11-20 21:05:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:34,020 INFO L495 AbstractCegarLoop]: Abstraction has 3754 states and 14418 transitions. [2022-11-20 21:05:34,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 14418 transitions. [2022-11-20 21:05:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:34,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:34,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:34,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 21:05:34,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:34,232 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:34,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2066144168, now seen corresponding path program 1 times [2022-11-20 21:05:34,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:34,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092205067] [2022-11-20 21:05:34,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:34,233 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 [2022-11-20 21:05:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:34,234 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:34,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-20 21:05:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:34,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:05:34,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:34,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:34,717 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-20 21:05:34,717 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-20 21:05:34,743 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 758 treesize of output 742 [2022-11-20 21:05:34,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:34,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:05:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:05:34,965 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:34,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:34,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092205067] [2022-11-20 21:05:34,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092205067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:34,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:34,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:05:34,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961532952] [2022-11-20 21:05:34,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:34,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:05:34,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:05:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:05:34,968 INFO L87 Difference]: Start difference. First operand 3754 states and 14418 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:35,261 INFO L93 Difference]: Finished difference Result 3762 states and 14452 transitions. [2022-11-20 21:05:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:05:35,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:35,271 INFO L225 Difference]: With dead ends: 3762 [2022-11-20 21:05:35,271 INFO L226 Difference]: Without dead ends: 3762 [2022-11-20 21:05:35,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:05:35,272 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 12 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 21:05:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2022-11-20 21:05:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3762. [2022-11-20 21:05:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3762 states, 3644 states have (on average 3.9659714599341385) internal successors, (14452), 3761 states have internal predecessors, (14452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:35,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3762 states to 3762 states and 14452 transitions. [2022-11-20 21:05:35,336 INFO L78 Accepts]: Start accepts. Automaton has 3762 states and 14452 transitions. Word has length 9 [2022-11-20 21:05:35,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:35,336 INFO L495 AbstractCegarLoop]: Abstraction has 3762 states and 14452 transitions. [2022-11-20 21:05:35,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:35,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3762 states and 14452 transitions. [2022-11-20 21:05:35,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:35,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:35,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:35,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:35,537 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:35,537 INFO L85 PathProgramCache]: Analyzing trace with hash 431411909, now seen corresponding path program 1 times [2022-11-20 21:05:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464693051] [2022-11-20 21:05:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:35,538 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 [2022-11-20 21:05:35,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:35,539 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:35,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:35,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:05:35,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:35,955 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:05:35,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:05:37,047 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:05:37,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:05:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:05:37,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:37,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:37,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464693051] [2022-11-20 21:05:37,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464693051] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:37,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:37,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:37,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142757182] [2022-11-20 21:05:37,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:37,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:37,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:37,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:37,535 INFO L87 Difference]: Start difference. First operand 3762 states and 14452 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:37,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:37,695 INFO L93 Difference]: Finished difference Result 3763 states and 14454 transitions. [2022-11-20 21:05:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:37,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:37,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:37,705 INFO L225 Difference]: With dead ends: 3763 [2022-11-20 21:05:37,706 INFO L226 Difference]: Without dead ends: 3763 [2022-11-20 21:05:37,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:37,706 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:37,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2022-11-20 21:05:37,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2022-11-20 21:05:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3763. [2022-11-20 21:05:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3645 states have (on average 3.965432098765432) internal successors, (14454), 3762 states have internal predecessors, (14454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 14454 transitions. [2022-11-20 21:05:37,770 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 14454 transitions. Word has length 9 [2022-11-20 21:05:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:37,770 INFO L495 AbstractCegarLoop]: Abstraction has 3763 states and 14454 transitions. [2022-11-20 21:05:37,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 14454 transitions. [2022-11-20 21:05:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:37,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:37,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:37,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:05:37,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:37,973 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash 431416466, now seen corresponding path program 1 times [2022-11-20 21:05:37,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:37,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111415637] [2022-11-20 21:05:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:37,974 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 [2022-11-20 21:05:37,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:37,976 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:37,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 21:05:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:38,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:05:38,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:38,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:38,369 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:05:38,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:05:38,786 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-20 21:05:38,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-20 21:05:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:05:39,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:05:39,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:39,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111415637] [2022-11-20 21:05:39,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111415637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:05:39,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:05:39,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:05:39,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261582643] [2022-11-20 21:05:39,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:05:39,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:05:39,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:05:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:39,025 INFO L87 Difference]: Start difference. First operand 3763 states and 14454 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:39,234 INFO L93 Difference]: Finished difference Result 3765 states and 14456 transitions. [2022-11-20 21:05:39,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:05:39,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:39,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:39,247 INFO L225 Difference]: With dead ends: 3765 [2022-11-20 21:05:39,247 INFO L226 Difference]: Without dead ends: 3765 [2022-11-20 21:05:39,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:05:39,248 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 21:05:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3765 states. [2022-11-20 21:05:39,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3765 to 3764. [2022-11-20 21:05:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3646 states have (on average 3.9646187602852443) internal successors, (14455), 3763 states have internal predecessors, (14455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 14455 transitions. [2022-11-20 21:05:39,334 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 14455 transitions. Word has length 9 [2022-11-20 21:05:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:39,334 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 14455 transitions. [2022-11-20 21:05:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 14455 transitions. [2022-11-20 21:05:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:39,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:39,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:39,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:05:39,539 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:05:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:05:39,539 INFO L85 PathProgramCache]: Analyzing trace with hash 431415967, now seen corresponding path program 1 times [2022-11-20 21:05:39,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:05:39,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194769143] [2022-11-20 21:05:39,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:39,540 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 [2022-11-20 21:05:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:05:39,541 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:05:39,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 21:05:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:05:39,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:40,065 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:40,065 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:40,365 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:40,365 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:40,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:40,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:40,554 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:40,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:40,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:46,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:05:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194769143] [2022-11-20 21:05:46,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194769143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [164437070] [2022-11-20 21:05:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:46,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:05:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:05:46,288 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:05:46,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-20 21:05:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:05:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:46,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:46,973 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:47,267 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:05:47,267 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:05:47,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:47,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:47,497 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:47,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:47,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:53,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [164437070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:53,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812580996] [2022-11-20 21:05:53,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:05:53,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:53,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:05:53,350 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:05:53,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 21:05:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:05:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:05:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:05:53,835 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:05:53,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:05:53,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:05:53,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:05:53,964 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:05:53,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:05:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:54,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:05:55,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:05:55,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-20 21:05:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:05:58,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812580996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:05:58,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:05:58,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-20 21:05:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827567097] [2022-11-20 21:05:58,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:58,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 21:05:58,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:05:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 21:05:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-20 21:05:58,967 INFO L87 Difference]: Start difference. First operand 3764 states and 14455 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:59,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:59,475 INFO L93 Difference]: Finished difference Result 3786 states and 14503 transitions. [2022-11-20 21:05:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:05:59,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:05:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:59,486 INFO L225 Difference]: With dead ends: 3786 [2022-11-20 21:05:59,486 INFO L226 Difference]: Without dead ends: 3786 [2022-11-20 21:05:59,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=48, Invalid=106, Unknown=2, NotChecked=0, Total=156 [2022-11-20 21:05:59,487 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:59,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-11-20 21:05:59,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2022-11-20 21:05:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3766. [2022-11-20 21:05:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3766 states, 3648 states have (on average 3.963815789473684) internal successors, (14460), 3765 states have internal predecessors, (14460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:59,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 14460 transitions. [2022-11-20 21:05:59,553 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 14460 transitions. Word has length 9 [2022-11-20 21:05:59,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:59,553 INFO L495 AbstractCegarLoop]: Abstraction has 3766 states and 14460 transitions. [2022-11-20 21:05:59,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:59,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 14460 transitions. [2022-11-20 21:05:59,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:05:59,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:05:59,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:05:59,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:59,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 21:05:59,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:00,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:00,159 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:00,160 INFO L85 PathProgramCache]: Analyzing trace with hash 431670488, now seen corresponding path program 1 times [2022-11-20 21:06:00,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:00,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [877046131] [2022-11-20 21:06:00,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:00,160 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:00,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:00,161 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:00,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-20 21:06:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:06:00,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:00,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:00,676 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:00,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:01,465 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:01,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:01,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:01,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:01,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [877046131] [2022-11-20 21:06:01,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [877046131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:01,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:01,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:01,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427760101] [2022-11-20 21:06:01,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:01,902 INFO L87 Difference]: Start difference. First operand 3766 states and 14460 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:02,078 INFO L93 Difference]: Finished difference Result 3767 states and 14466 transitions. [2022-11-20 21:06:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:02,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:02,088 INFO L225 Difference]: With dead ends: 3767 [2022-11-20 21:06:02,089 INFO L226 Difference]: Without dead ends: 3767 [2022-11-20 21:06:02,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:02,089 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:02,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-20 21:06:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2022-11-20 21:06:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3767. [2022-11-20 21:06:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3649 states have (on average 3.9643738010413814) internal successors, (14466), 3766 states have internal predecessors, (14466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 14466 transitions. [2022-11-20 21:06:02,157 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 14466 transitions. Word has length 9 [2022-11-20 21:06:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:02,157 INFO L495 AbstractCegarLoop]: Abstraction has 3767 states and 14466 transitions. [2022-11-20 21:06:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 14466 transitions. [2022-11-20 21:06:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:02,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:02,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:02,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:02,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:02,366 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1808105753, now seen corresponding path program 1 times [2022-11-20 21:06:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881569441] [2022-11-20 21:06:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:02,367 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:02,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:02,368 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:02,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:06:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:03,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881569441] [2022-11-20 21:06:03,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881569441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:03,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2130696728] [2022-11-20 21:06:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:03,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:03,072 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:03,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-20 21:06:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 21:06:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:03,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:03,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2130696728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:03,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373431137] [2022-11-20 21:06:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:03,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:03,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:03,708 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:03,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 21:06:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:03,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:06:03,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:04,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:04,518 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 53 treesize of output 49 [2022-11-20 21:06:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373431137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:07,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:06:07,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-20 21:06:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640933057] [2022-11-20 21:06:07,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:07,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:06:07,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:06:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:06:07,147 INFO L87 Difference]: Start difference. First operand 3767 states and 14466 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:09,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:09,581 INFO L93 Difference]: Finished difference Result 3774 states and 14483 transitions. [2022-11-20 21:06:09,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:06:09,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:09,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:09,591 INFO L225 Difference]: With dead ends: 3774 [2022-11-20 21:06:09,591 INFO L226 Difference]: Without dead ends: 3774 [2022-11-20 21:06:09,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:06:09,592 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:09,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 92 Unchecked, 0.5s Time] [2022-11-20 21:06:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2022-11-20 21:06:09,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3774. [2022-11-20 21:06:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3656 states have (on average 3.961433260393873) internal successors, (14483), 3773 states have internal predecessors, (14483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 14483 transitions. [2022-11-20 21:06:09,654 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 14483 transitions. Word has length 9 [2022-11-20 21:06:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:09,655 INFO L495 AbstractCegarLoop]: Abstraction has 3774 states and 14483 transitions. [2022-11-20 21:06:09,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 14483 transitions. [2022-11-20 21:06:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:09,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:09,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:09,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:09,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:10,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:10,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:10,256 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1808105719, now seen corresponding path program 1 times [2022-11-20 21:06:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1405726560] [2022-11-20 21:06:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:10,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:10,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:10,258 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:10,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:10,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:10,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:10,664 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 21:06:10,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 21:06:11,247 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 21:06:11,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 21:06:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:11,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:11,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1405726560] [2022-11-20 21:06:11,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1405726560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:11,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:11,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:06:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354023926] [2022-11-20 21:06:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:06:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:11,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:06:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:11,789 INFO L87 Difference]: Start difference. First operand 3774 states and 14483 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:12,009 INFO L93 Difference]: Finished difference Result 3776 states and 14489 transitions. [2022-11-20 21:06:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:12,023 INFO L225 Difference]: With dead ends: 3776 [2022-11-20 21:06:12,024 INFO L226 Difference]: Without dead ends: 3776 [2022-11-20 21:06:12,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:12,024 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:12,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-11-20 21:06:12,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2022-11-20 21:06:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 3776. [2022-11-20 21:06:12,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3776 states, 3658 states have (on average 3.9609075997813012) internal successors, (14489), 3775 states have internal predecessors, (14489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3776 states to 3776 states and 14489 transitions. [2022-11-20 21:06:12,103 INFO L78 Accepts]: Start accepts. Automaton has 3776 states and 14489 transitions. Word has length 9 [2022-11-20 21:06:12,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:12,103 INFO L495 AbstractCegarLoop]: Abstraction has 3776 states and 14489 transitions. [2022-11-20 21:06:12,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3776 states and 14489 transitions. [2022-11-20 21:06:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:12,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:12,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:12,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:12,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:12,305 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1807985938, now seen corresponding path program 1 times [2022-11-20 21:06:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:12,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111761906] [2022-11-20 21:06:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:12,305 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 [2022-11-20 21:06:12,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:12,306 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:12,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-20 21:06:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:06:12,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:12,873 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:06:12,873 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:06:13,208 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:06:13,208 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:06:13,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:13,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:13,383 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:13,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:06:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:13,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:17,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:17,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111761906] [2022-11-20 21:06:17,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111761906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:17,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1934360364] [2022-11-20 21:06:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:17,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:17,835 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:17,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-20 21:06:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:06:18,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:18,554 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:06:18,554 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:06:18,880 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:06:18,881 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:06:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:19,137 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:19,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:06:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:19,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:21,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1934360364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:21,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679731612] [2022-11-20 21:06:21,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:21,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:21,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:21,870 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:21,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 21:06:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:22,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:22,382 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:06:22,382 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:06:22,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:22,512 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:22,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:06:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:22,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:23,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:06:23,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2022-11-20 21:06:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:27,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679731612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:27,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:06:27,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-20 21:06:27,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443934071] [2022-11-20 21:06:27,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:27,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 21:06:27,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 21:06:27,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-20 21:06:27,697 INFO L87 Difference]: Start difference. First operand 3776 states and 14489 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:28,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:28,146 INFO L93 Difference]: Finished difference Result 3782 states and 14508 transitions. [2022-11-20 21:06:28,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:06:28,147 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:28,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:28,157 INFO L225 Difference]: With dead ends: 3782 [2022-11-20 21:06:28,157 INFO L226 Difference]: Without dead ends: 3782 [2022-11-20 21:06:28,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=40, Invalid=91, Unknown=1, NotChecked=0, Total=132 [2022-11-20 21:06:28,158 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:28,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-11-20 21:06:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2022-11-20 21:06:28,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3778. [2022-11-20 21:06:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3660 states have (on average 3.960655737704918) internal successors, (14496), 3777 states have internal predecessors, (14496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 14496 transitions. [2022-11-20 21:06:28,224 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 14496 transitions. Word has length 9 [2022-11-20 21:06:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:28,224 INFO L495 AbstractCegarLoop]: Abstraction has 3778 states and 14496 transitions. [2022-11-20 21:06:28,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 14496 transitions. [2022-11-20 21:06:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:28,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:28,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:28,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:28,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:28,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:28,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:28,827 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:28,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1800092945, now seen corresponding path program 1 times [2022-11-20 21:06:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:28,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984216244] [2022-11-20 21:06:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:28,828 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 [2022-11-20 21:06:28,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:28,828 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-20 21:06:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:29,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:06:29,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:29,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:29,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984216244] [2022-11-20 21:06:29,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984216244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:29,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:29,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:29,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634335356] [2022-11-20 21:06:29,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:29,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:29,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:29,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:29,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:29,060 INFO L87 Difference]: Start difference. First operand 3778 states and 14496 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:29,474 INFO L93 Difference]: Finished difference Result 4297 states and 15816 transitions. [2022-11-20 21:06:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:29,523 INFO L225 Difference]: With dead ends: 4297 [2022-11-20 21:06:29,523 INFO L226 Difference]: Without dead ends: 4295 [2022-11-20 21:06:29,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:29,523 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:29,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 7 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:06:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2022-11-20 21:06:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 3906. [2022-11-20 21:06:29,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3778 states have (on average 3.915299100052938) internal successors, (14792), 3905 states have internal predecessors, (14792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 14792 transitions. [2022-11-20 21:06:29,591 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 14792 transitions. Word has length 9 [2022-11-20 21:06:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:29,591 INFO L495 AbstractCegarLoop]: Abstraction has 3906 states and 14792 transitions. [2022-11-20 21:06:29,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 14792 transitions. [2022-11-20 21:06:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:29,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:29,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:29,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:29,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:29,792 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1800092893, now seen corresponding path program 1 times [2022-11-20 21:06:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:29,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336446503] [2022-11-20 21:06:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:29,795 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 [2022-11-20 21:06:29,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:29,795 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:29,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 21:06:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:30,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:06:30,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:30,248 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:30,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:30,981 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:30,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:31,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:31,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:31,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336446503] [2022-11-20 21:06:31,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336446503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:31,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:31,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:31,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095702952] [2022-11-20 21:06:31,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:31,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:31,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:31,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:31,315 INFO L87 Difference]: Start difference. First operand 3906 states and 14792 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:31,485 INFO L93 Difference]: Finished difference Result 3910 states and 14803 transitions. [2022-11-20 21:06:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:31,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:31,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:31,495 INFO L225 Difference]: With dead ends: 3910 [2022-11-20 21:06:31,495 INFO L226 Difference]: Without dead ends: 3910 [2022-11-20 21:06:31,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:31,496 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:31,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-20 21:06:31,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-20 21:06:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 3908. [2022-11-20 21:06:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3780 states have (on average 3.914814814814815) internal successors, (14798), 3907 states have internal predecessors, (14798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 14798 transitions. [2022-11-20 21:06:31,583 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 14798 transitions. Word has length 9 [2022-11-20 21:06:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:31,583 INFO L495 AbstractCegarLoop]: Abstraction has 3908 states and 14798 transitions. [2022-11-20 21:06:31,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 14798 transitions. [2022-11-20 21:06:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 21:06:31,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:31,584 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:31,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 21:06:31,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:31,796 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1271157744, now seen corresponding path program 2 times [2022-11-20 21:06:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:31,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466982942] [2022-11-20 21:06:31,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:06:31,797 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 [2022-11-20 21:06:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:31,798 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:31,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:32,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:06:32,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:32,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:32,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:32,338 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:06:32,338 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:06:32,666 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-20 21:06:32,666 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-20 21:06:32,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:32,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-20 21:06:32,853 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-20 21:06:32,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-20 21:06:32,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:06:32,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:32,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:32,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466982942] [2022-11-20 21:06:32,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466982942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:32,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:32,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:06:32,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460941167] [2022-11-20 21:06:32,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:32,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:06:32,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:32,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:06:32,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:06:32,920 INFO L87 Difference]: Start difference. First operand 3908 states and 14798 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:33,291 INFO L93 Difference]: Finished difference Result 3003 states and 11103 transitions. [2022-11-20 21:06:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:06:33,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-20 21:06:33,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:33,301 INFO L225 Difference]: With dead ends: 3003 [2022-11-20 21:06:33,301 INFO L226 Difference]: Without dead ends: 3003 [2022-11-20 21:06:33,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:06:33,302 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:33,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 8 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:06:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2022-11-20 21:06:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2974. [2022-11-20 21:06:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2974 states, 2906 states have (on average 3.7980041293874742) internal successors, (11037), 2973 states have internal predecessors, (11037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2974 states to 2974 states and 11037 transitions. [2022-11-20 21:06:33,362 INFO L78 Accepts]: Start accepts. Automaton has 2974 states and 11037 transitions. Word has length 9 [2022-11-20 21:06:33,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:33,363 INFO L495 AbstractCegarLoop]: Abstraction has 2974 states and 11037 transitions. [2022-11-20 21:06:33,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2974 states and 11037 transitions. [2022-11-20 21:06:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:33,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:33,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:33,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:33,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:33,564 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash 910691879, now seen corresponding path program 1 times [2022-11-20 21:06:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:33,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1035554913] [2022-11-20 21:06:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:33,565 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 [2022-11-20 21:06:33,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:33,566 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:33,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-20 21:06:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:06:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:33,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:33,988 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:33,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:34,076 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:06:34,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:06:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:34,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:34,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:34,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1035554913] [2022-11-20 21:06:34,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1035554913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:34,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:34,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001805831] [2022-11-20 21:06:34,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:34,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:34,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:34,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:34,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:34,179 INFO L87 Difference]: Start difference. First operand 2974 states and 11037 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:34,342 INFO L93 Difference]: Finished difference Result 2973 states and 11035 transitions. [2022-11-20 21:06:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:34,343 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:34,350 INFO L225 Difference]: With dead ends: 2973 [2022-11-20 21:06:34,350 INFO L226 Difference]: Without dead ends: 2973 [2022-11-20 21:06:34,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:34,351 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:34,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 21:06:34,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-11-20 21:06:34,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2970. [2022-11-20 21:06:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2902 states have (on average 3.801171605789111) internal successors, (11031), 2969 states have internal predecessors, (11031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 11031 transitions. [2022-11-20 21:06:34,402 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 11031 transitions. Word has length 10 [2022-11-20 21:06:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:34,402 INFO L495 AbstractCegarLoop]: Abstraction has 2970 states and 11031 transitions. [2022-11-20 21:06:34,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:34,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 11031 transitions. [2022-11-20 21:06:34,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:34,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:34,403 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:34,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:34,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:34,603 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:34,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:34,604 INFO L85 PathProgramCache]: Analyzing trace with hash 915071156, now seen corresponding path program 1 times [2022-11-20 21:06:34,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:34,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508393623] [2022-11-20 21:06:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:34,604 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 [2022-11-20 21:06:34,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:34,606 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:34,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-20 21:06:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:06:34,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:34,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:35,049 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:35,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:35,750 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:35,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:36,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:36,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:36,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508393623] [2022-11-20 21:06:36,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508393623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:36,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:36,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:36,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726380708] [2022-11-20 21:06:36,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:36,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:36,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:36,201 INFO L87 Difference]: Start difference. First operand 2970 states and 11031 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:36,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:36,356 INFO L93 Difference]: Finished difference Result 2973 states and 11035 transitions. [2022-11-20 21:06:36,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:36,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:36,364 INFO L225 Difference]: With dead ends: 2973 [2022-11-20 21:06:36,364 INFO L226 Difference]: Without dead ends: 2973 [2022-11-20 21:06:36,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:36,364 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:36,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 44 Unchecked, 0.1s Time] [2022-11-20 21:06:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2973 states. [2022-11-20 21:06:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2973 to 2970. [2022-11-20 21:06:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2902 states have (on average 3.801171605789111) internal successors, (11031), 2969 states have internal predecessors, (11031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 11031 transitions. [2022-11-20 21:06:36,410 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 11031 transitions. Word has length 10 [2022-11-20 21:06:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:36,410 INFO L495 AbstractCegarLoop]: Abstraction has 2970 states and 11031 transitions. [2022-11-20 21:06:36,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 11031 transitions. [2022-11-20 21:06:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:36,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:36,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:36,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Ended with exit code 0 [2022-11-20 21:06:36,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:36,623 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1159188163, now seen corresponding path program 1 times [2022-11-20 21:06:36,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:36,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918849060] [2022-11-20 21:06:36,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:36,624 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 [2022-11-20 21:06:36,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:36,625 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:36,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:06:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:36,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:37,166 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-20 21:06:37,166 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-20 21:06:37,192 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 246 treesize of output 242 [2022-11-20 21:06:37,298 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-20 21:06:37,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:06:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:37,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:38,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918849060] [2022-11-20 21:06:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918849060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1688611211] [2022-11-20 21:06:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:38,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:06:38,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:06:38,096 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:06:38,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-20 21:06:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:38,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:06:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:38,856 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-20 21:06:38,856 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-20 21:06:38,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:38,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 21:06:39,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:39,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:39,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1688611211] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:39,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:06:39,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 4] total 9 [2022-11-20 21:06:39,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172013439] [2022-11-20 21:06:39,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:39,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:06:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:06:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:06:39,106 INFO L87 Difference]: Start difference. First operand 2970 states and 11031 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:39,386 INFO L93 Difference]: Finished difference Result 2745 states and 10183 transitions. [2022-11-20 21:06:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:39,396 INFO L225 Difference]: With dead ends: 2745 [2022-11-20 21:06:39,396 INFO L226 Difference]: Without dead ends: 2745 [2022-11-20 21:06:39,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:06:39,397 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:39,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 4 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-20 21:06:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2022-11-20 21:06:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2730. [2022-11-20 21:06:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2675 states have (on average 3.78803738317757) internal successors, (10133), 2729 states have internal predecessors, (10133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 10133 transitions. [2022-11-20 21:06:39,467 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 10133 transitions. Word has length 10 [2022-11-20 21:06:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:39,467 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 10133 transitions. [2022-11-20 21:06:39,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 10133 transitions. [2022-11-20 21:06:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:39,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:39,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:39,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:39,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:39,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:39,873 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:39,874 INFO L85 PathProgramCache]: Analyzing trace with hash 512507594, now seen corresponding path program 1 times [2022-11-20 21:06:39,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:39,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134797959] [2022-11-20 21:06:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:39,875 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 [2022-11-20 21:06:39,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:39,876 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:39,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-20 21:06:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:40,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:40,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:40,316 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:40,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:40,976 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:40,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:41,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:41,378 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134797959] [2022-11-20 21:06:41,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134797959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:41,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:41,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:41,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038268960] [2022-11-20 21:06:41,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:41,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:41,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:41,379 INFO L87 Difference]: Start difference. First operand 2730 states and 10133 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:41,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:41,543 INFO L93 Difference]: Finished difference Result 2743 states and 10161 transitions. [2022-11-20 21:06:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:41,550 INFO L225 Difference]: With dead ends: 2743 [2022-11-20 21:06:41,550 INFO L226 Difference]: Without dead ends: 2743 [2022-11-20 21:06:41,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:41,550 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:41,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:41,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-11-20 21:06:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2743. [2022-11-20 21:06:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2743 states, 2688 states have (on average 3.7801339285714284) internal successors, (10161), 2742 states have internal predecessors, (10161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2743 states to 2743 states and 10161 transitions. [2022-11-20 21:06:41,618 INFO L78 Accepts]: Start accepts. Automaton has 2743 states and 10161 transitions. Word has length 10 [2022-11-20 21:06:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:41,618 INFO L495 AbstractCegarLoop]: Abstraction has 2743 states and 10161 transitions. [2022-11-20 21:06:41,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2743 states and 10161 transitions. [2022-11-20 21:06:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:41,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:41,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:41,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:41,831 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:41,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 648265181, now seen corresponding path program 1 times [2022-11-20 21:06:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:41,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [672393777] [2022-11-20 21:06:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:41,832 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 [2022-11-20 21:06:41,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:41,833 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:06:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:42,310 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:42,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:42,405 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:06:42,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:06:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:42,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:42,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:42,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [672393777] [2022-11-20 21:06:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [672393777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:42,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:42,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185698770] [2022-11-20 21:06:42,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:42,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:42,507 INFO L87 Difference]: Start difference. First operand 2743 states and 10161 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:42,666 INFO L93 Difference]: Finished difference Result 2747 states and 10166 transitions. [2022-11-20 21:06:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:42,673 INFO L225 Difference]: With dead ends: 2747 [2022-11-20 21:06:42,674 INFO L226 Difference]: Without dead ends: 2747 [2022-11-20 21:06:42,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:42,674 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:42,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2022-11-20 21:06:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2747. [2022-11-20 21:06:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2692 states have (on average 3.776374442793462) internal successors, (10166), 2746 states have internal predecessors, (10166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:42,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 10166 transitions. [2022-11-20 21:06:42,719 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 10166 transitions. Word has length 10 [2022-11-20 21:06:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:42,719 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 10166 transitions. [2022-11-20 21:06:42,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:42,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 10166 transitions. [2022-11-20 21:06:42,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:42,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:42,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:42,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:42,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:42,921 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -374042588, now seen corresponding path program 1 times [2022-11-20 21:06:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:42,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108292903] [2022-11-20 21:06:42,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:42,922 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 [2022-11-20 21:06:42,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:42,923 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:42,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-20 21:06:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:06:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:43,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:43,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:43,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108292903] [2022-11-20 21:06:43,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108292903] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:43,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:43,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:43,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115857932] [2022-11-20 21:06:43,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:43,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:43,172 INFO L87 Difference]: Start difference. First operand 2747 states and 10166 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:43,541 INFO L93 Difference]: Finished difference Result 2468 states and 9003 transitions. [2022-11-20 21:06:43,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:43,547 INFO L225 Difference]: With dead ends: 2468 [2022-11-20 21:06:43,547 INFO L226 Difference]: Without dead ends: 2452 [2022-11-20 21:06:43,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:43,548 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:43,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:06:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-11-20 21:06:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2289. [2022-11-20 21:06:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 2248 states have (on average 3.77135231316726) internal successors, (8478), 2288 states have internal predecessors, (8478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 8478 transitions. [2022-11-20 21:06:43,586 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 8478 transitions. Word has length 10 [2022-11-20 21:06:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:43,586 INFO L495 AbstractCegarLoop]: Abstraction has 2289 states and 8478 transitions. [2022-11-20 21:06:43,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 8478 transitions. [2022-11-20 21:06:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:43,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:43,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:43,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:43,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:43,791 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 488868452, now seen corresponding path program 1 times [2022-11-20 21:06:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:43,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [534574653] [2022-11-20 21:06:43,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:43,792 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 [2022-11-20 21:06:43,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:43,793 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:43,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-20 21:06:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:44,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:06:44,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:44,274 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 21:06:44,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 21:06:44,911 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 21:06:44,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 21:06:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:45,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:45,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:45,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [534574653] [2022-11-20 21:06:45,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [534574653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:45,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:45,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:06:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002886369] [2022-11-20 21:06:45,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:45,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:06:45,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:45,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:06:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:45,572 INFO L87 Difference]: Start difference. First operand 2289 states and 8478 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:45,710 INFO L93 Difference]: Finished difference Result 2289 states and 8477 transitions. [2022-11-20 21:06:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:45,716 INFO L225 Difference]: With dead ends: 2289 [2022-11-20 21:06:45,716 INFO L226 Difference]: Without dead ends: 2289 [2022-11-20 21:06:45,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:45,717 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:45,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-20 21:06:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2022-11-20 21:06:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2287. [2022-11-20 21:06:45,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2246 states have (on average 3.771593944790739) internal successors, (8471), 2286 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 8471 transitions. [2022-11-20 21:06:45,752 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 8471 transitions. Word has length 10 [2022-11-20 21:06:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:45,752 INFO L495 AbstractCegarLoop]: Abstraction has 2287 states and 8471 transitions. [2022-11-20 21:06:45,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 8471 transitions. [2022-11-20 21:06:45,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:45,753 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:45,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:45,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:45,953 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash 496881278, now seen corresponding path program 1 times [2022-11-20 21:06:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:45,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019726821] [2022-11-20 21:06:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:45,954 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 [2022-11-20 21:06:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:45,955 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:45,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:46,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:46,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:46,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:46,476 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:46,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:47,289 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:47,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:47,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:47,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:47,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019726821] [2022-11-20 21:06:47,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019726821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:47,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004574958] [2022-11-20 21:06:47,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:47,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:47,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:47,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:47,705 INFO L87 Difference]: Start difference. First operand 2287 states and 8471 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:47,863 INFO L93 Difference]: Finished difference Result 2285 states and 8466 transitions. [2022-11-20 21:06:47,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:47,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:47,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:47,869 INFO L225 Difference]: With dead ends: 2285 [2022-11-20 21:06:47,869 INFO L226 Difference]: Without dead ends: 2285 [2022-11-20 21:06:47,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:47,869 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-11-20 21:06:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2283. [2022-11-20 21:06:47,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2242 states have (on average 3.7738626226583407) internal successors, (8461), 2282 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 8461 transitions. [2022-11-20 21:06:47,903 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 8461 transitions. Word has length 10 [2022-11-20 21:06:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:47,904 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 8461 transitions. [2022-11-20 21:06:47,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 8461 transitions. [2022-11-20 21:06:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:47,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:47,905 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:47,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:48,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:48,117 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:48,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:48,118 INFO L85 PathProgramCache]: Analyzing trace with hash -216705527, now seen corresponding path program 2 times [2022-11-20 21:06:48,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:48,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [889161191] [2022-11-20 21:06:48,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:06:48,118 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:48,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:48,119 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:48,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-20 21:06:48,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:06:48,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:48,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:06:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:48,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:48,523 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:06:48,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:06:49,788 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:06:49,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:50,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:50,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:50,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [889161191] [2022-11-20 21:06:50,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [889161191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:50,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:50,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:50,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189654957] [2022-11-20 21:06:50,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:50,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:50,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:50,435 INFO L87 Difference]: Start difference. First operand 2283 states and 8461 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:50,583 INFO L93 Difference]: Finished difference Result 2285 states and 8466 transitions. [2022-11-20 21:06:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:50,589 INFO L225 Difference]: With dead ends: 2285 [2022-11-20 21:06:50,589 INFO L226 Difference]: Without dead ends: 2285 [2022-11-20 21:06:50,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:50,589 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:50,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-11-20 21:06:50,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2285. [2022-11-20 21:06:50,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 2244 states have (on average 3.772727272727273) internal successors, (8466), 2284 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 8466 transitions. [2022-11-20 21:06:50,624 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 8466 transitions. Word has length 10 [2022-11-20 21:06:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:50,625 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 8466 transitions. [2022-11-20 21:06:50,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 8466 transitions. [2022-11-20 21:06:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:50,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:50,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:50,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:50,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:50,837 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:50,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash -216700970, now seen corresponding path program 1 times [2022-11-20 21:06:50,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34531951] [2022-11-20 21:06:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:50,838 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 [2022-11-20 21:06:50,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:50,839 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:50,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-20 21:06:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:51,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:51,280 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 21:06:51,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 21:06:51,848 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 21:06:51,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 21:06:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:52,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:52,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:52,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34531951] [2022-11-20 21:06:52,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34531951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:52,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:52,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:06:52,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397406899] [2022-11-20 21:06:52,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:52,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:06:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:06:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:52,432 INFO L87 Difference]: Start difference. First operand 2285 states and 8466 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:52,586 INFO L93 Difference]: Finished difference Result 2286 states and 8467 transitions. [2022-11-20 21:06:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:06:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:52,592 INFO L225 Difference]: With dead ends: 2286 [2022-11-20 21:06:52,592 INFO L226 Difference]: Without dead ends: 2286 [2022-11-20 21:06:52,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:06:52,592 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:52,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-20 21:06:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-11-20 21:06:52,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 2286. [2022-11-20 21:06:52,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2245 states have (on average 3.7714922048997774) internal successors, (8467), 2285 states have internal predecessors, (8467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 8467 transitions. [2022-11-20 21:06:52,631 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 8467 transitions. Word has length 10 [2022-11-20 21:06:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:52,631 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 8467 transitions. [2022-11-20 21:06:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 8467 transitions. [2022-11-20 21:06:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 21:06:52,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:52,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:52,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-20 21:06:52,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:52,832 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash -212333868, now seen corresponding path program 1 times [2022-11-20 21:06:52,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:52,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1107843255] [2022-11-20 21:06:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:52,833 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 [2022-11-20 21:06:52,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:52,835 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:52,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:53,280 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:53,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:54,013 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:54,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:54,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:54,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1107843255] [2022-11-20 21:06:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1107843255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:54,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111284339] [2022-11-20 21:06:54,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:54,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:54,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:54,351 INFO L87 Difference]: Start difference. First operand 2286 states and 8467 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:54,503 INFO L93 Difference]: Finished difference Result 2289 states and 8471 transitions. [2022-11-20 21:06:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:54,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 21:06:54,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:54,509 INFO L225 Difference]: With dead ends: 2289 [2022-11-20 21:06:54,509 INFO L226 Difference]: Without dead ends: 2289 [2022-11-20 21:06:54,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:54,509 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:54,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2022-11-20 21:06:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2286. [2022-11-20 21:06:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2245 states have (on average 3.7714922048997774) internal successors, (8467), 2285 states have internal predecessors, (8467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 8467 transitions. [2022-11-20 21:06:54,546 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 8467 transitions. Word has length 10 [2022-11-20 21:06:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:54,547 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 8467 transitions. [2022-11-20 21:06:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 8467 transitions. [2022-11-20 21:06:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:06:54,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:54,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:54,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:54,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:54,748 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:54,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:54,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1833324785, now seen corresponding path program 1 times [2022-11-20 21:06:54,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:54,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1251813249] [2022-11-20 21:06:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:54,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:54,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:54,749 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:54,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-20 21:06:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:55,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:06:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:55,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:55,212 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:55,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:55,934 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:06:55,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:06:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:56,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:56,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:56,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1251813249] [2022-11-20 21:06:56,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1251813249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:56,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:56,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:56,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061306578] [2022-11-20 21:06:56,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:56,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:56,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:56,390 INFO L87 Difference]: Start difference. First operand 2286 states and 8467 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:56,541 INFO L93 Difference]: Finished difference Result 2285 states and 8466 transitions. [2022-11-20 21:06:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:06:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:56,546 INFO L225 Difference]: With dead ends: 2285 [2022-11-20 21:06:56,546 INFO L226 Difference]: Without dead ends: 2285 [2022-11-20 21:06:56,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:56,547 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:56,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-11-20 21:06:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2281. [2022-11-20 21:06:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2241 states have (on average 3.775546630968318) internal successors, (8461), 2280 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 8461 transitions. [2022-11-20 21:06:56,583 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 8461 transitions. Word has length 11 [2022-11-20 21:06:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:56,583 INFO L495 AbstractCegarLoop]: Abstraction has 2281 states and 8461 transitions. [2022-11-20 21:06:56,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:56,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 8461 transitions. [2022-11-20 21:06:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:06:56,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:56,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:56,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-20 21:06:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:56,784 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:56,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1697567198, now seen corresponding path program 1 times [2022-11-20 21:06:56,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:56,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276652220] [2022-11-20 21:06:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:56,785 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 [2022-11-20 21:06:56,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:56,786 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:56,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-20 21:06:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:06:57,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:57,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:57,251 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:06:57,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:06:57,339 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:06:57,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:06:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:06:57,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:57,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:57,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276652220] [2022-11-20 21:06:57,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276652220] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:57,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:57,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:06:57,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270388165] [2022-11-20 21:06:57,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:57,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:57,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:57,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:57,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:57,456 INFO L87 Difference]: Start difference. First operand 2281 states and 8461 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:57,607 INFO L93 Difference]: Finished difference Result 2285 states and 8466 transitions. [2022-11-20 21:06:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:57,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:06:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:57,613 INFO L225 Difference]: With dead ends: 2285 [2022-11-20 21:06:57,613 INFO L226 Difference]: Without dead ends: 2285 [2022-11-20 21:06:57,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:57,613 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:57,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:06:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-11-20 21:06:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2272. [2022-11-20 21:06:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2232 states have (on average 3.7804659498207887) internal successors, (8438), 2271 states have internal predecessors, (8438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:57,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 8438 transitions. [2022-11-20 21:06:57,650 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 8438 transitions. Word has length 11 [2022-11-20 21:06:57,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:57,650 INFO L495 AbstractCegarLoop]: Abstraction has 2272 states and 8438 transitions. [2022-11-20 21:06:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:57,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 8438 transitions. [2022-11-20 21:06:57,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:06:57,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:57,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:57,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:57,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:57,851 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:57,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:57,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1289679061, now seen corresponding path program 1 times [2022-11-20 21:06:57,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:57,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879903739] [2022-11-20 21:06:57,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:57,852 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 [2022-11-20 21:06:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:57,852 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:57,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:06:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:58,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:06:58,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:06:58,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:06:58,143 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:06:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879903739] [2022-11-20 21:06:58,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879903739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:06:58,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:06:58,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:06:58,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287312053] [2022-11-20 21:06:58,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:58,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:06:58,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:06:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:06:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:58,144 INFO L87 Difference]: Start difference. First operand 2272 states and 8438 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:58,358 INFO L93 Difference]: Finished difference Result 1825 states and 6515 transitions. [2022-11-20 21:06:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:06:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:06:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:58,362 INFO L225 Difference]: With dead ends: 1825 [2022-11-20 21:06:58,362 INFO L226 Difference]: Without dead ends: 1789 [2022-11-20 21:06:58,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:06:58,362 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:58,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 4 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:06:58,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-11-20 21:06:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 1789. [2022-11-20 21:06:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1761 states have (on average 3.644520159000568) internal successors, (6418), 1788 states have internal predecessors, (6418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:58,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 6418 transitions. [2022-11-20 21:06:58,388 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 6418 transitions. Word has length 11 [2022-11-20 21:06:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:58,388 INFO L495 AbstractCegarLoop]: Abstraction has 1789 states and 6418 transitions. [2022-11-20 21:06:58,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:06:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 6418 transitions. [2022-11-20 21:06:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:06:58,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:58,389 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:58,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:58,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:06:58,589 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:06:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2024950258, now seen corresponding path program 2 times [2022-11-20 21:06:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:06:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717414863] [2022-11-20 21:06:58,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:06:58,590 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 [2022-11-20 21:06:58,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:06:58,591 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:06:58,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-20 21:06:58,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:06:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:06:58,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:06:58,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:06:59,017 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-20 21:06:59,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-20 21:07:00,165 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-20 21:07:00,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:07:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 21:07:00,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:00,832 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:00,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717414863] [2022-11-20 21:07:00,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717414863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:00,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:00,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:07:00,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025606743] [2022-11-20 21:07:00,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:00,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:07:00,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:07:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:00,833 INFO L87 Difference]: Start difference. First operand 1789 states and 6418 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:00,972 INFO L93 Difference]: Finished difference Result 1787 states and 6414 transitions. [2022-11-20 21:07:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:07:00,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:00,976 INFO L225 Difference]: With dead ends: 1787 [2022-11-20 21:07:00,977 INFO L226 Difference]: Without dead ends: 1787 [2022-11-20 21:07:00,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:00,977 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:00,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-20 21:07:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2022-11-20 21:07:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1787. [2022-11-20 21:07:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1759 states have (on average 3.646389994314952) internal successors, (6414), 1786 states have internal predecessors, (6414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 6414 transitions. [2022-11-20 21:07:01,004 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 6414 transitions. Word has length 11 [2022-11-20 21:07:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:01,005 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 6414 transitions. [2022-11-20 21:07:01,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 6414 transitions. [2022-11-20 21:07:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:01,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:01,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:01,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Ended with exit code 0 [2022-11-20 21:07:01,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:01,207 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:01,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:01,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2024945701, now seen corresponding path program 1 times [2022-11-20 21:07:01,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:01,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804985782] [2022-11-20 21:07:01,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:01,208 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 [2022-11-20 21:07:01,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:01,208 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:01,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-20 21:07:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:01,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:07:01,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:01,687 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-20 21:07:01,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-20 21:07:02,284 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-20 21:07:02,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-20 21:07:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:07:02,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:02,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804985782] [2022-11-20 21:07:02,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804985782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:02,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:02,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:07:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442300948] [2022-11-20 21:07:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:07:02,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:07:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:02,928 INFO L87 Difference]: Start difference. First operand 1787 states and 6414 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:03,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:03,081 INFO L93 Difference]: Finished difference Result 1786 states and 6413 transitions. [2022-11-20 21:07:03,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:07:03,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:03,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:03,085 INFO L225 Difference]: With dead ends: 1786 [2022-11-20 21:07:03,085 INFO L226 Difference]: Without dead ends: 1786 [2022-11-20 21:07:03,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:03,086 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:03,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-11-20 21:07:03,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2022-11-20 21:07:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1783. [2022-11-20 21:07:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1756 states have (on average 3.6486332574031892) internal successors, (6407), 1782 states have internal predecessors, (6407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6407 transitions. [2022-11-20 21:07:03,112 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6407 transitions. Word has length 11 [2022-11-20 21:07:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:03,112 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 6407 transitions. [2022-11-20 21:07:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6407 transitions. [2022-11-20 21:07:03,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:03,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:03,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:03,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Ended with exit code 0 [2022-11-20 21:07:03,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:03,315 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:03,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:03,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2024957876, now seen corresponding path program 1 times [2022-11-20 21:07:03,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:03,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828877930] [2022-11-20 21:07:03,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:03,316 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 [2022-11-20 21:07:03,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:03,316 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:03,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:07:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 21:07:03,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:07:03,846 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:07:03,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:07:03,974 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:07:03,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:07:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:07:04,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:04,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:04,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828877930] [2022-11-20 21:07:04,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828877930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:04,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:04,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:07:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614883424] [2022-11-20 21:07:04,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:04,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:07:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:07:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:04,101 INFO L87 Difference]: Start difference. First operand 1783 states and 6407 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:04,243 INFO L93 Difference]: Finished difference Result 1782 states and 6404 transitions. [2022-11-20 21:07:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:07:04,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:04,248 INFO L225 Difference]: With dead ends: 1782 [2022-11-20 21:07:04,248 INFO L226 Difference]: Without dead ends: 1782 [2022-11-20 21:07:04,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:04,248 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:04,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 21:07:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2022-11-20 21:07:04,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1779. [2022-11-20 21:07:04,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1752 states have (on average 3.651255707762557) internal successors, (6397), 1778 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6397 transitions. [2022-11-20 21:07:04,278 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6397 transitions. Word has length 11 [2022-11-20 21:07:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:04,278 INFO L495 AbstractCegarLoop]: Abstraction has 1779 states and 6397 transitions. [2022-11-20 21:07:04,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6397 transitions. [2022-11-20 21:07:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:04,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:04,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:04,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:07:04,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:04,483 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:04,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:04,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2020578599, now seen corresponding path program 1 times [2022-11-20 21:07:04,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:04,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668962815] [2022-11-20 21:07:04,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:04,484 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 [2022-11-20 21:07:04,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:04,484 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:04,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-20 21:07:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:07:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:04,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:07:04,977 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:07:04,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:07:05,103 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 21:07:05,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-20 21:07:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:07:05,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:05,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668962815] [2022-11-20 21:07:05,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668962815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:05,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:05,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:07:05,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526928322] [2022-11-20 21:07:05,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:07:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:05,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:07:05,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:05,194 INFO L87 Difference]: Start difference. First operand 1779 states and 6397 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:05,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:05,325 INFO L93 Difference]: Finished difference Result 1778 states and 6395 transitions. [2022-11-20 21:07:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:07:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:05,329 INFO L225 Difference]: With dead ends: 1778 [2022-11-20 21:07:05,330 INFO L226 Difference]: Without dead ends: 1778 [2022-11-20 21:07:05,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:05,330 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:05,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 21:07:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-11-20 21:07:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1768. [2022-11-20 21:07:05,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1741 states have (on average 3.6605399195864448) internal successors, (6373), 1767 states have internal predecessors, (6373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 6373 transitions. [2022-11-20 21:07:05,357 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 6373 transitions. Word has length 11 [2022-11-20 21:07:05,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:05,358 INFO L495 AbstractCegarLoop]: Abstraction has 1768 states and 6373 transitions. [2022-11-20 21:07:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 6373 transitions. [2022-11-20 21:07:05,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:05,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:05,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:05,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-20 21:07:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:05,559 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:05,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:05,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1872184208, now seen corresponding path program 1 times [2022-11-20 21:07:05,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474030325] [2022-11-20 21:07:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:05,560 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 [2022-11-20 21:07:05,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:05,561 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:05,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-20 21:07:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:07:05,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:06,036 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 21:07:06,036 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 21:07:06,396 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-20 21:07:06,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-20 21:07:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:06,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:06,653 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:06,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474030325] [2022-11-20 21:07:06,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474030325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:06,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:06,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:07:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524903186] [2022-11-20 21:07:06,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:06,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:07:06,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:06,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:07:06,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:06,654 INFO L87 Difference]: Start difference. First operand 1768 states and 6373 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:06,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:06,797 INFO L93 Difference]: Finished difference Result 1781 states and 6404 transitions. [2022-11-20 21:07:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:07:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:06,802 INFO L225 Difference]: With dead ends: 1781 [2022-11-20 21:07:06,802 INFO L226 Difference]: Without dead ends: 1781 [2022-11-20 21:07:06,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:06,803 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:06,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-11-20 21:07:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-11-20 21:07:06,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1778. [2022-11-20 21:07:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1751 states have (on average 3.654483152484295) internal successors, (6399), 1777 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 6399 transitions. [2022-11-20 21:07:06,829 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 6399 transitions. Word has length 11 [2022-11-20 21:07:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:06,829 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 6399 transitions. [2022-11-20 21:07:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 6399 transitions. [2022-11-20 21:07:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:06,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:06,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:06,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-20 21:07:07,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:07,031 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1872040058, now seen corresponding path program 2 times [2022-11-20 21:07:07,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:07,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827561144] [2022-11-20 21:07:07,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:07:07,032 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 [2022-11-20 21:07:07,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:07,033 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:07,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:07:07,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:07:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:07,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:07:07,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:07,484 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 21:07:07,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 21:07:07,862 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-20 21:07:07,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-20 21:07:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:08,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:08,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:08,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827561144] [2022-11-20 21:07:08,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827561144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:08,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:08,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:07:08,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802770254] [2022-11-20 21:07:08,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:08,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:07:08,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:08,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:07:08,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:08,120 INFO L87 Difference]: Start difference. First operand 1778 states and 6399 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:08,273 INFO L93 Difference]: Finished difference Result 1793 states and 6439 transitions. [2022-11-20 21:07:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:07:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:08,277 INFO L225 Difference]: With dead ends: 1793 [2022-11-20 21:07:08,277 INFO L226 Difference]: Without dead ends: 1793 [2022-11-20 21:07:08,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:08,278 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:08,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2022-11-20 21:07:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2022-11-20 21:07:08,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1781. [2022-11-20 21:07:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1754 states have (on average 3.652223489167617) internal successors, (6406), 1780 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:08,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 6406 transitions. [2022-11-20 21:07:08,305 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 6406 transitions. Word has length 11 [2022-11-20 21:07:08,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:08,305 INFO L495 AbstractCegarLoop]: Abstraction has 1781 states and 6406 transitions. [2022-11-20 21:07:08,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:08,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 6406 transitions. [2022-11-20 21:07:08,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:08,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:08,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:08,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:07:08,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:08,518 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1871828948, now seen corresponding path program 3 times [2022-11-20 21:07:08,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:08,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913427469] [2022-11-20 21:07:08,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:07:08,519 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 [2022-11-20 21:07:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:08,520 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:08,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-20 21:07:08,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-20 21:07:08,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:07:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 21:07:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:08,954 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 21:07:08,954 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 21:07:09,323 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-20 21:07:09,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-20 21:07:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:09,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:09,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:09,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913427469] [2022-11-20 21:07:09,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913427469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:09,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:09,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:07:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527279904] [2022-11-20 21:07:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:07:09,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:07:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:09,624 INFO L87 Difference]: Start difference. First operand 1781 states and 6406 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:09,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:09,770 INFO L93 Difference]: Finished difference Result 1795 states and 6446 transitions. [2022-11-20 21:07:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:07:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:09,774 INFO L225 Difference]: With dead ends: 1795 [2022-11-20 21:07:09,774 INFO L226 Difference]: Without dead ends: 1795 [2022-11-20 21:07:09,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:07:09,775 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:09,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-20 21:07:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-11-20 21:07:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1784. [2022-11-20 21:07:09,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1757 states have (on average 3.651678998292544) internal successors, (6416), 1783 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6416 transitions. [2022-11-20 21:07:09,801 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6416 transitions. Word has length 11 [2022-11-20 21:07:09,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:09,801 INFO L495 AbstractCegarLoop]: Abstraction has 1784 states and 6416 transitions. [2022-11-20 21:07:09,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:09,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6416 transitions. [2022-11-20 21:07:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:09,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:09,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:09,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-20 21:07:10,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:10,002 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:10,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1871825135, now seen corresponding path program 1 times [2022-11-20 21:07:10,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:10,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773553580] [2022-11-20 21:07:10,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:10,003 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 [2022-11-20 21:07:10,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:10,004 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:10,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-20 21:07:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:10,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:07:10,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:10,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:07:10,483 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:07:10,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:07:11,200 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:07:11,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:07:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:11,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:11,704 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:11,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773553580] [2022-11-20 21:07:11,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773553580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:11,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:11,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:07:11,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971531194] [2022-11-20 21:07:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:07:11,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:07:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:11,705 INFO L87 Difference]: Start difference. First operand 1784 states and 6416 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:11,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:11,840 INFO L93 Difference]: Finished difference Result 1796 states and 6442 transitions. [2022-11-20 21:07:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:07:11,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:11,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:11,844 INFO L225 Difference]: With dead ends: 1796 [2022-11-20 21:07:11,845 INFO L226 Difference]: Without dead ends: 1796 [2022-11-20 21:07:11,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:11,845 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:11,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 21:07:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-11-20 21:07:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1787. [2022-11-20 21:07:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1760 states have (on average 3.649431818181818) internal successors, (6423), 1786 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 6423 transitions. [2022-11-20 21:07:11,872 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 6423 transitions. Word has length 11 [2022-11-20 21:07:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:11,872 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 6423 transitions. [2022-11-20 21:07:11,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:11,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 6423 transitions. [2022-11-20 21:07:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 21:07:11,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:11,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:07:11,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Ended with exit code 0 [2022-11-20 21:07:12,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:12,073 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash 2007582722, now seen corresponding path program 1 times [2022-11-20 21:07:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608930208] [2022-11-20 21:07:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:12,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:12,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:12,074 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:12,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:07:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:12,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:07:12,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:12,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:07:12,549 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-20 21:07:12,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-20 21:07:13,304 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-20 21:07:13,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-20 21:07:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:07:13,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:07:13,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608930208] [2022-11-20 21:07:13,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608930208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:07:13,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:07:13,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 21:07:13,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343731180] [2022-11-20 21:07:13,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:07:13,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:07:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:13,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:07:13,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:13,904 INFO L87 Difference]: Start difference. First operand 1787 states and 6423 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:07:14,051 INFO L93 Difference]: Finished difference Result 1804 states and 6452 transitions. [2022-11-20 21:07:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:07:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 21:07:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:07:14,055 INFO L225 Difference]: With dead ends: 1804 [2022-11-20 21:07:14,055 INFO L226 Difference]: Without dead ends: 1804 [2022-11-20 21:07:14,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:07:14,056 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:07:14,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-20 21:07:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-11-20 21:07:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1787. [2022-11-20 21:07:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1760 states have (on average 3.649431818181818) internal successors, (6423), 1786 states have internal predecessors, (6423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 6423 transitions. [2022-11-20 21:07:14,098 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 6423 transitions. Word has length 11 [2022-11-20 21:07:14,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:07:14,098 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 6423 transitions. [2022-11-20 21:07:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:07:14,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 6423 transitions. [2022-11-20 21:07:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:07:14,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:07:14,099 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1] [2022-11-20 21:07:14,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-20 21:07:14,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:07:14,311 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:07:14,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:07:14,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1735083836, now seen corresponding path program 1 times [2022-11-20 21:07:14,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:07:14,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87343202] [2022-11-20 21:07:14,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:14,312 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 [2022-11-20 21:07:14,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:07:14,313 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:07:14,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-20 21:07:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:14,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:07:14,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:14,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:07:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:15,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:18,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:18,556 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:07:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87343202] [2022-11-20 21:07:18,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87343202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460013982] [2022-11-20 21:07:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:18,556 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:07:18,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:07:18,557 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:07:18,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-20 21:07:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:07:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:19,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:07:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:19,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:23,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460013982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:23,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474976911] [2022-11-20 21:07:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:07:23,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:07:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:07:23,872 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:07:23,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-11-20 21:07:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:07:24,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:07:24,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:07:24,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:07:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:24,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:07:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:07:25,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474976911] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:07:25,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:07:25,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2022-11-20 21:07:25,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201735034] [2022-11-20 21:07:25,324 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:07:25,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-20 21:07:25,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:07:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-20 21:07:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:07:25,325 INFO L87 Difference]: Start difference. First operand 1787 states and 6423 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 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) [2022-11-20 21:07:34,143 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 [] [2022-11-20 21:07:35,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:37,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:39,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:41,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:43,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:45,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:47,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:49,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:51,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:53,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:55,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:57,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:07:59,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:01,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:03,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:08,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:10,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:16,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:08:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:49,528 INFO L93 Difference]: Finished difference Result 34737 states and 126253 transitions. [2022-11-20 21:08:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 21:08:49,531 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 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 12 [2022-11-20 21:08:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:49,676 INFO L225 Difference]: With dead ends: 34737 [2022-11-20 21:08:49,676 INFO L226 Difference]: Without dead ends: 34737 [2022-11-20 21:08:49,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=1159, Invalid=2263, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 21:08:49,677 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6584 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 5408 mSolverCounterSat, 337 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6584 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 5760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 5408 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:49,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6584 Valid, 560 Invalid, 5760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [337 Valid, 5408 Invalid, 15 Unknown, 0 Unchecked, 60.6s Time] [2022-11-20 21:08:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34737 states. [2022-11-20 21:08:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34737 to 1814. [2022-11-20 21:08:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1787 states have (on average 3.625629546726357) internal successors, (6479), 1813 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 6479 transitions. [2022-11-20 21:08:49,959 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 6479 transitions. Word has length 12 [2022-11-20 21:08:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:49,959 INFO L495 AbstractCegarLoop]: Abstraction has 1814 states and 6479 transitions. [2022-11-20 21:08:49,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 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) [2022-11-20 21:08:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 6479 transitions. [2022-11-20 21:08:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:08:49,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:49,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:49,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-20 21:08:50,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-11-20 21:08:50,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-20 21:08:50,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:08:50,568 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:08:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:50,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1651172395, now seen corresponding path program 1 times [2022-11-20 21:08:50,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:08:50,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242880928] [2022-11-20 21:08:50,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:50,568 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 [2022-11-20 21:08:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:08:50,569 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:08:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-20 21:08:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:50,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 21:08:50,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:51,120 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 21:08:51,120 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 21:08:51,534 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-20 21:08:51,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 40 [2022-11-20 21:08:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:08:51,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:08:51,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:08:51,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242880928] [2022-11-20 21:08:51,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242880928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:51,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:51,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:51,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073634059] [2022-11-20 21:08:51,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:51,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:08:51,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:08:51,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:08:51,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:51,859 INFO L87 Difference]: Start difference. First operand 1814 states and 6479 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:52,023 INFO L93 Difference]: Finished difference Result 1822 states and 6505 transitions. [2022-11-20 21:08:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:08:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:08:52,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:52,028 INFO L225 Difference]: With dead ends: 1822 [2022-11-20 21:08:52,028 INFO L226 Difference]: Without dead ends: 1822 [2022-11-20 21:08:52,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:52,028 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:52,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-11-20 21:08:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-11-20 21:08:52,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1816. [2022-11-20 21:08:52,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1789 states have (on average 3.6243711570709896) internal successors, (6484), 1815 states have internal predecessors, (6484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6484 transitions. [2022-11-20 21:08:52,059 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6484 transitions. Word has length 12 [2022-11-20 21:08:52,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:52,059 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 6484 transitions. [2022-11-20 21:08:52,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6484 transitions. [2022-11-20 21:08:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:08:52,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:52,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:52,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Forceful destruction successful, exit code 0 [2022-11-20 21:08:52,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:08:52,261 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:08:52,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:52,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1651028245, now seen corresponding path program 2 times [2022-11-20 21:08:52,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:08:52,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849930840] [2022-11-20 21:08:52,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:08:52,262 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 [2022-11-20 21:08:52,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:08:52,263 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:08:52,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-20 21:08:52,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:08:52,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:08:52,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:08:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:52,743 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-20 21:08:52,744 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 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-20 21:08:52,843 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-20 21:08:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-20 21:08:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:08:53,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:08:53,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:08:53,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849930840] [2022-11-20 21:08:53,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849930840] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:53,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:53,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812031670] [2022-11-20 21:08:53,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:08:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:08:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:08:53,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:53,031 INFO L87 Difference]: Start difference. First operand 1816 states and 6484 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:53,246 INFO L93 Difference]: Finished difference Result 1787 states and 6396 transitions. [2022-11-20 21:08:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:08:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:08:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:53,251 INFO L225 Difference]: With dead ends: 1787 [2022-11-20 21:08:53,252 INFO L226 Difference]: Without dead ends: 1787 [2022-11-20 21:08:53,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:53,252 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:53,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 4 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:08:53,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2022-11-20 21:08:53,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1762. [2022-11-20 21:08:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1741 states have (on average 3.639862148190695) internal successors, (6337), 1761 states have internal predecessors, (6337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6337 transitions. [2022-11-20 21:08:53,286 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6337 transitions. Word has length 12 [2022-11-20 21:08:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:53,286 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 6337 transitions. [2022-11-20 21:08:53,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6337 transitions. [2022-11-20 21:08:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:08:53,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:53,286 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:53,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 21:08:53,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:08:53,487 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:08:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:53,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2091833710, now seen corresponding path program 1 times [2022-11-20 21:08:53,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:08:53,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372122621] [2022-11-20 21:08:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:53,488 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 [2022-11-20 21:08:53,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:08:53,489 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:08:53,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:08:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:53,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:08:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:53,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:08:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:53,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:08:53,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:08:53,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372122621] [2022-11-20 21:08:53,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372122621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:53,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:53,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705407262] [2022-11-20 21:08:53,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:53,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:08:53,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:08:53,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:08:53,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:08:53,850 INFO L87 Difference]: Start difference. First operand 1762 states and 6337 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:54,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:54,131 INFO L93 Difference]: Finished difference Result 1418 states and 4938 transitions. [2022-11-20 21:08:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:08:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:08:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:54,136 INFO L225 Difference]: With dead ends: 1418 [2022-11-20 21:08:54,136 INFO L226 Difference]: Without dead ends: 1418 [2022-11-20 21:08:54,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:54,137 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:54,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 4 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 21:08:54,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-11-20 21:08:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1418. [2022-11-20 21:08:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1407 states have (on average 3.509594882729211) internal successors, (4938), 1417 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4938 transitions. [2022-11-20 21:08:54,169 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4938 transitions. Word has length 12 [2022-11-20 21:08:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:54,170 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 4938 transitions. [2022-11-20 21:08:54,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4938 transitions. [2022-11-20 21:08:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 21:08:54,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:54,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:54,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:08:54,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:08:54,383 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:08:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2091833709, now seen corresponding path program 1 times [2022-11-20 21:08:54,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:08:54,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336576656] [2022-11-20 21:08:54,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:54,384 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 [2022-11-20 21:08:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:08:54,385 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:08:54,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-20 21:08:54,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 21:08:54,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:54,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:08:54,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:08:54,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336576656] [2022-11-20 21:08:54,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336576656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:08:54,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:08:54,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:08:54,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235719274] [2022-11-20 21:08:54,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:08:54,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:08:54,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:08:54,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:08:54,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:08:54,796 INFO L87 Difference]: Start difference. First operand 1418 states and 4938 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:08:55,268 INFO L93 Difference]: Finished difference Result 2069 states and 6894 transitions. [2022-11-20 21:08:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:08:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-20 21:08:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:08:55,273 INFO L225 Difference]: With dead ends: 2069 [2022-11-20 21:08:55,273 INFO L226 Difference]: Without dead ends: 2057 [2022-11-20 21:08:55,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:08:55,274 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:08:55,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 12 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:08:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-11-20 21:08:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1809. [2022-11-20 21:08:55,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1809 states, 1797 states have (on average 3.47022815804118) internal successors, (6236), 1808 states have internal predecessors, (6236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 6236 transitions. [2022-11-20 21:08:55,305 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 6236 transitions. Word has length 12 [2022-11-20 21:08:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:08:55,305 INFO L495 AbstractCegarLoop]: Abstraction has 1809 states and 6236 transitions. [2022-11-20 21:08:55,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:08:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 6236 transitions. [2022-11-20 21:08:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:08:55,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:08:55,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:08:55,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-20 21:08:55,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:08:55,507 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:08:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:08:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash -353265320, now seen corresponding path program 1 times [2022-11-20 21:08:55,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:08:55,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127163615] [2022-11-20 21:08:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:55,508 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 [2022-11-20 21:08:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:08:55,509 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:08:55,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-20 21:08:55,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:55,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:08:55,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:55,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:08:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:56,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:08:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:57,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:08:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127163615] [2022-11-20 21:08:57,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127163615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:08:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438726000] [2022-11-20 21:08:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:08:57,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:08:57,279 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:08:57,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (96)] Waiting until timeout for monitored process [2022-11-20 21:08:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:08:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:57,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:08:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:58,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:08:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:59,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438726000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:08:59,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335292702] [2022-11-20 21:08:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:08:59,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:08:59,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:08:59,116 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:08:59,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-11-20 21:08:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:08:59,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:08:59,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:08:59,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:08:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:08:59,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:00,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335292702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:00,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:00,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-20 21:09:00,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863524973] [2022-11-20 21:09:00,277 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:00,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:09:00,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:00,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:09:00,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:09:00,278 INFO L87 Difference]: Start difference. First operand 1809 states and 6236 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:01,742 INFO L93 Difference]: Finished difference Result 1870 states and 6387 transitions. [2022-11-20 21:09:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:09:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 21:09:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:01,747 INFO L225 Difference]: With dead ends: 1870 [2022-11-20 21:09:01,747 INFO L226 Difference]: Without dead ends: 1870 [2022-11-20 21:09:01,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:09:01,748 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:01,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-11-20 21:09:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-11-20 21:09:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1830. [2022-11-20 21:09:01,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1830 states, 1818 states have (on average 3.460946094609461) internal successors, (6292), 1829 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1830 states to 1830 states and 6292 transitions. [2022-11-20 21:09:01,776 INFO L78 Accepts]: Start accepts. Automaton has 1830 states and 6292 transitions. Word has length 13 [2022-11-20 21:09:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 1830 states and 6292 transitions. [2022-11-20 21:09:01,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1830 states and 6292 transitions. [2022-11-20 21:09:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:09:01,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:01,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:01,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (96)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:01,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:02,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Ended with exit code 0 [2022-11-20 21:09:02,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:09:02,385 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:09:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:02,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1954043009, now seen corresponding path program 1 times [2022-11-20 21:09:02,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:02,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114644327] [2022-11-20 21:09:02,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:02,385 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 [2022-11-20 21:09:02,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:02,386 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:09:02,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-20 21:09:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:02,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:09:02,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:02,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:03,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:04,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114644327] [2022-11-20 21:09:04,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114644327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:04,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [552059304] [2022-11-20 21:09:04,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:04,666 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:04,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (99)] Waiting until timeout for monitored process [2022-11-20 21:09:05,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:05,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:05,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:05,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:05,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:06,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [552059304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:06,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154076512] [2022-11-20 21:09:06,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:06,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:06,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:06,583 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:06,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-11-20 21:09:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:06,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:06,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:06,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:07,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:09:07,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154076512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:07,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:07,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-20 21:09:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679752091] [2022-11-20 21:09:07,954 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:09:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:07,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:09:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:09:07,955 INFO L87 Difference]: Start difference. First operand 1830 states and 6292 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:09,860 INFO L93 Difference]: Finished difference Result 1888 states and 6413 transitions. [2022-11-20 21:09:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:09:09,860 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:09:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:09,864 INFO L225 Difference]: With dead ends: 1888 [2022-11-20 21:09:09,865 INFO L226 Difference]: Without dead ends: 1888 [2022-11-20 21:09:09,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:09:09,865 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:09,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-11-20 21:09:09,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2022-11-20 21:09:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1834. [2022-11-20 21:09:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1822 states have (on average 3.456641053787047) internal successors, (6298), 1833 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6298 transitions. [2022-11-20 21:09:09,893 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6298 transitions. Word has length 14 [2022-11-20 21:09:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:09,893 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 6298 transitions. [2022-11-20 21:09:09,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6298 transitions. [2022-11-20 21:09:09,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:09:09,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:09,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:09,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:10,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-11-20 21:09:10,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (99)] Ended with exit code 0 [2022-11-20 21:09:10,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:10,495 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:09:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:10,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1933679543, now seen corresponding path program 1 times [2022-11-20 21:09:10,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:10,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223341296] [2022-11-20 21:09:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:10,496 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 [2022-11-20 21:09:10,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:10,496 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:09:10,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-20 21:09:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:10,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:09:10,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:10,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:11,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:12,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223341296] [2022-11-20 21:09:12,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223341296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:12,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1267560589] [2022-11-20 21:09:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:12,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:12,702 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:12,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-20 21:09:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:13,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:13,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:13,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:14,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:14,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1267560589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:14,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38826325] [2022-11-20 21:09:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:14,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:14,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:14,503 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:14,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-11-20 21:09:14,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:09:14,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:14,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:09:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:15,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:09:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38826325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:15,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:15,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-20 21:09:15,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467493532] [2022-11-20 21:09:15,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 21:09:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 21:09:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:09:15,696 INFO L87 Difference]: Start difference. First operand 1834 states and 6298 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:17,673 INFO L93 Difference]: Finished difference Result 1904 states and 6479 transitions. [2022-11-20 21:09:17,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:09:17,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:09:17,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:17,678 INFO L225 Difference]: With dead ends: 1904 [2022-11-20 21:09:17,678 INFO L226 Difference]: Without dead ends: 1904 [2022-11-20 21:09:17,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-20 21:09:17,678 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:17,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-11-20 21:09:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2022-11-20 21:09:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1844. [2022-11-20 21:09:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1832 states have (on average 3.4546943231441047) internal successors, (6329), 1843 states have internal predecessors, (6329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:17,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6329 transitions. [2022-11-20 21:09:17,705 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6329 transitions. Word has length 14 [2022-11-20 21:09:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:17,705 INFO L495 AbstractCegarLoop]: Abstraction has 1844 states and 6329 transitions. [2022-11-20 21:09:17,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6329 transitions. [2022-11-20 21:09:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 21:09:17,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:17,706 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1] [2022-11-20 21:09:17,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-20 21:09:17,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:18,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:18,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:09:18,311 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:09:18,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:18,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1448865822, now seen corresponding path program 3 times [2022-11-20 21:09:18,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:09:18,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937586601] [2022-11-20 21:09:18,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:09:18,312 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 [2022-11-20 21:09:18,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:09:18,313 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:09:18,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-20 21:09:18,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 21:09:18,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:09:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:09:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:19,031 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:09:19,032 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:09:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:19,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:24,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:09:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937586601] [2022-11-20 21:09:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937586601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:24,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1162927045] [2022-11-20 21:09:24,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:09:24,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:09:24,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:09:24,555 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:09:24,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-11-20 21:09:26,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 21:09:26,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:09:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:09:26,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:26,591 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:09:26,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:09:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:26,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:27,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1162927045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:27,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109813804] [2022-11-20 21:09:27,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:09:27,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:27,445 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:27,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-11-20 21:09:36,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 21:09:36,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:09:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:09:36,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:36,483 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:09:36,483 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:09:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:36,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:09:37,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109813804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:09:37,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:09:37,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 26 [2022-11-20 21:09:37,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854924654] [2022-11-20 21:09:37,394 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:09:37,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 21:09:37,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:09:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 21:09:37,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-11-20 21:09:37,395 INFO L87 Difference]: Start difference. First operand 1844 states and 6329 transitions. Second operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:09:54,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:09:56,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:09:58,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:00,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:02,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:04,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:06,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:08,021 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:10,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:12,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:14,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:16,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:10:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:43,698 INFO L93 Difference]: Finished difference Result 21047 states and 74253 transitions. [2022-11-20 21:10:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 21:10:43,699 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-20 21:10:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:43,769 INFO L225 Difference]: With dead ends: 21047 [2022-11-20 21:10:43,769 INFO L226 Difference]: Without dead ends: 21047 [2022-11-20 21:10:43,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 21:10:43,770 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 4780 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 6159 mSolverCounterSat, 477 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4780 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 6647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 6159 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:43,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4780 Valid, 685 Invalid, 6647 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [477 Valid, 6159 Invalid, 11 Unknown, 0 Unchecked, 41.0s Time] [2022-11-20 21:10:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21047 states. [2022-11-20 21:10:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21047 to 1855. [2022-11-20 21:10:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1843 states have (on average 3.4449267498643517) internal successors, (6349), 1854 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:43,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 6349 transitions. [2022-11-20 21:10:43,935 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 6349 transitions. Word has length 14 [2022-11-20 21:10:43,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:43,935 INFO L495 AbstractCegarLoop]: Abstraction has 1855 states and 6349 transitions. [2022-11-20 21:10:43,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:43,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 6349 transitions. [2022-11-20 21:10:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:10:43,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:43,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:43,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:44,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2022-11-20 21:10:44,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-11-20 21:10:44,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:10:44,551 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:10:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1884300135, now seen corresponding path program 1 times [2022-11-20 21:10:44,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:44,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1023167676] [2022-11-20 21:10:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:10:44,552 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 [2022-11-20 21:10:44,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:44,553 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:10:44,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Waiting until timeout for monitored process [2022-11-20 21:10:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:10:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:10:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:44,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:44,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1023167676] [2022-11-20 21:10:44,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1023167676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:44,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:44,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:10:44,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114543000] [2022-11-20 21:10:44,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:44,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:10:44,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:44,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:10:44,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:44,894 INFO L87 Difference]: Start difference. First operand 1855 states and 6349 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-20 21:10:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:45,087 INFO L93 Difference]: Finished difference Result 1737 states and 5962 transitions. [2022-11-20 21:10:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:10:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:10:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:45,091 INFO L225 Difference]: With dead ends: 1737 [2022-11-20 21:10:45,091 INFO L226 Difference]: Without dead ends: 1479 [2022-11-20 21:10:45,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:10:45,091 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:45,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:10:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-11-20 21:10:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1386. [2022-11-20 21:10:45,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1380 states have (on average 3.465217391304348) internal successors, (4782), 1385 states have internal predecessors, (4782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 4782 transitions. [2022-11-20 21:10:45,111 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 4782 transitions. Word has length 15 [2022-11-20 21:10:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:45,111 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 4782 transitions. [2022-11-20 21:10:45,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-20 21:10:45,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 4782 transitions. [2022-11-20 21:10:45,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 21:10:45,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:45,113 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:10:45,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (107)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:45,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:10:45,325 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:10:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:45,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2024690872, now seen corresponding path program 2 times [2022-11-20 21:10:45,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:45,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564337314] [2022-11-20 21:10:45,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:45,325 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 [2022-11-20 21:10:45,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:45,326 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:10:45,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-20 21:10:45,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:10:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:10:45,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:45,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:10:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:10:45,863 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:10:45,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:45,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564337314] [2022-11-20 21:10:45,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564337314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:10:45,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:10:45,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:10:45,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951555145] [2022-11-20 21:10:45,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:10:45,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:10:45,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:10:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:10:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:10:45,864 INFO L87 Difference]: Start difference. First operand 1386 states and 4782 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:46,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:10:46,138 INFO L93 Difference]: Finished difference Result 1114 states and 3678 transitions. [2022-11-20 21:10:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:10:46,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 21:10:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:10:46,141 INFO L225 Difference]: With dead ends: 1114 [2022-11-20 21:10:46,142 INFO L226 Difference]: Without dead ends: 1114 [2022-11-20 21:10:46,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:10:46,142 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:10:46,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 4 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:10:46,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-20 21:10:46,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1079. [2022-11-20 21:10:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1076 states have (on average 3.33364312267658) internal successors, (3587), 1078 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3587 transitions. [2022-11-20 21:10:46,156 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3587 transitions. Word has length 15 [2022-11-20 21:10:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:10:46,156 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 3587 transitions. [2022-11-20 21:10:46,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:10:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3587 transitions. [2022-11-20 21:10:46,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 21:10:46,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:10:46,158 INFO L195 NwaCegarLoop]: trace histogram [20, 1, 1, 1] [2022-11-20 21:10:46,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-20 21:10:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:10:46,370 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:10:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:10:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash -229323999, now seen corresponding path program 2 times [2022-11-20 21:10:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:10:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [557057580] [2022-11-20 21:10:46,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:46,371 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 [2022-11-20 21:10:46,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:10:46,373 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:10:46,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-20 21:10:46,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:10:46,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:10:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:10:46,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:10:46,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:10:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:48,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:10:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:10:59,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:10:59,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [557057580] [2022-11-20 21:10:59,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [557057580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:10:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1893258222] [2022-11-20 21:10:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:10:59,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:10:59,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:10:59,649 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:10:59,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-20 21:11:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:11:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:11:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 21:11:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:11:00,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:11:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:11:01,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:11:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:11:20,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1893258222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:11:20,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468644574] [2022-11-20 21:11:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:11:20,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:11:20,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:11:20,150 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:11:20,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-20 21:11:20,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:11:20,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:11:20,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 21:11:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:11:20,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 21:11:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:11:21,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:11:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:11:22,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468644574] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:11:22,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:11:22,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 64 [2022-11-20 21:11:22,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123814134] [2022-11-20 21:11:22,527 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:11:22,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 21:11:22,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:11:22,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 21:11:22,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1050, Invalid=3110, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 21:11:22,528 INFO L87 Difference]: Start difference. First operand 1079 states and 3587 transitions. Second operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:11:48,460 WARN L233 SmtUtils]: Spent 8.06s on a formula simplification that was a NOOP. DAG size: 228 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:11:51,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:11:53,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:11:55,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:11:57,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:11:59,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:01,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:03,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:05,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:07,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:09,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:11,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:13,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:15,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:17,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:19,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:21,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:23,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:25,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:27,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:29,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:31,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:33,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:35,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:37,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:39,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:41,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:43,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:45,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:47,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:49,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:51,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:53,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:55,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:57,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:12:59,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:13:01,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:13:03,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:13:05,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-20 21:13:17,288 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 218 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:31,600 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification that was a NOOP. DAG size: 207 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:42,150 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:13:50,996 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 185 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:14:00,719 WARN L233 SmtUtils]: Spent 6.71s on a formula simplification that was a NOOP. DAG size: 175 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:15:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:23,700 INFO L93 Difference]: Finished difference Result 38158 states and 130961 transitions. [2022-11-20 21:15:23,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 21:15:23,701 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-20 21:15:23,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:23,808 INFO L225 Difference]: With dead ends: 38158 [2022-11-20 21:15:23,808 INFO L226 Difference]: Without dead ends: 38158 [2022-11-20 21:15:23,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 134.0s TimeCoverageRelationStatistics Valid=2160, Invalid=4980, Unknown=0, NotChecked=0, Total=7140 [2022-11-20 21:15:23,809 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 25416 mSDsluCounter, 1736 mSDsCounter, 0 mSdLazyCounter, 14565 mSolverCounterSat, 1226 mSolverCounterUnsat, 38 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25416 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 15829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1226 IncrementalHoareTripleChecker+Valid, 14565 IncrementalHoareTripleChecker+Invalid, 38 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.9s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:23,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25416 Valid, 1817 Invalid, 15829 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1226 Valid, 14565 Invalid, 38 Unknown, 0 Unchecked, 135.9s Time] [2022-11-20 21:15:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38158 states. [2022-11-20 21:15:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38158 to 1123. [2022-11-20 21:15:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1120 states have (on average 3.28125) internal successors, (3675), 1122 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 3675 transitions. [2022-11-20 21:15:24,077 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 3675 transitions. Word has length 23 [2022-11-20 21:15:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:24,078 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 3675 transitions. [2022-11-20 21:15:24,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 3675 transitions. [2022-11-20 21:15:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 21:15:24,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:24,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:24,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-11-20 21:15:24,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Ended with exit code 0 [2022-11-20 21:15:24,487 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (110)] Ended with exit code 0 [2022-11-20 21:15:24,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:15:24,681 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:15:24,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:24,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1027276206, now seen corresponding path program 1 times [2022-11-20 21:15:24,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:24,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895887670] [2022-11-20 21:15:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:15:24,682 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 [2022-11-20 21:15:24,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:24,683 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:15:24,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-20 21:15:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:15:25,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:15:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:25,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:25,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:25,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895887670] [2022-11-20 21:15:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895887670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:25,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:15:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65783127] [2022-11-20 21:15:25,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:15:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:15:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:15:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:15:25,120 INFO L87 Difference]: Start difference. First operand 1123 states and 3675 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:25,552 INFO L93 Difference]: Finished difference Result 1237 states and 3867 transitions. [2022-11-20 21:15:25,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 21:15:25,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 21:15:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:25,556 INFO L225 Difference]: With dead ends: 1237 [2022-11-20 21:15:25,556 INFO L226 Difference]: Without dead ends: 1167 [2022-11-20 21:15:25,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:15:25,556 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:25,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 8 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:15:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-11-20 21:15:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1069. [2022-11-20 21:15:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1066 states have (on average 3.1566604127579736) internal successors, (3365), 1068 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:25,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3365 transitions. [2022-11-20 21:15:25,573 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3365 transitions. Word has length 26 [2022-11-20 21:15:25,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:25,574 INFO L495 AbstractCegarLoop]: Abstraction has 1069 states and 3365 transitions. [2022-11-20 21:15:25,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:25,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3365 transitions. [2022-11-20 21:15:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-20 21:15:25,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:25,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:15:25,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-20 21:15:25,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:15:25,776 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:15:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1463966576, now seen corresponding path program 2 times [2022-11-20 21:15:25,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:25,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301843299] [2022-11-20 21:15:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:15:25,777 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:15:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:25,777 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:15:25,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-20 21:15:26,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 21:15:26,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:15:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:26,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:15:26,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:26,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301843299] [2022-11-20 21:15:26,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301843299] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:15:26,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:15:26,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:15:26,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434960943] [2022-11-20 21:15:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:15:26,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:15:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:15:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:15:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:15:26,299 INFO L87 Difference]: Start difference. First operand 1069 states and 3365 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:26,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:15:26,936 INFO L93 Difference]: Finished difference Result 1429 states and 4598 transitions. [2022-11-20 21:15:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:15:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-20 21:15:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:15:26,947 INFO L225 Difference]: With dead ends: 1429 [2022-11-20 21:15:26,947 INFO L226 Difference]: Without dead ends: 859 [2022-11-20 21:15:26,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:15:26,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:15:26,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:15:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-11-20 21:15:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 775. [2022-11-20 21:15:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 772 states have (on average 3.1528497409326426) internal successors, (2434), 774 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:26,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2434 transitions. [2022-11-20 21:15:26,963 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2434 transitions. Word has length 26 [2022-11-20 21:15:26,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:15:26,963 INFO L495 AbstractCegarLoop]: Abstraction has 775 states and 2434 transitions. [2022-11-20 21:15:26,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:15:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2434 transitions. [2022-11-20 21:15:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:15:26,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:15:26,965 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1] [2022-11-20 21:15:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Forceful destruction successful, exit code 0 [2022-11-20 21:15:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:15:27,166 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-20 21:15:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:15:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 221509698, now seen corresponding path program 4 times [2022-11-20 21:15:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:15:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271226904] [2022-11-20 21:15:27,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:15:27,167 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 [2022-11-20 21:15:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:15:27,167 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 21:15:27,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-20 21:15:27,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:15:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 21:15:27,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:27,911 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:15:27,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:15:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:30,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:49,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:15:49,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271226904] [2022-11-20 21:15:49,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271226904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:15:49,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1245973450] [2022-11-20 21:15:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:15:49,927 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:15:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:15:49,928 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:15:49,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (115)] Waiting until timeout for monitored process [2022-11-20 21:15:50,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:15:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-20 21:15:50,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:51,244 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:15:51,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:15:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:54,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:15:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:57,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1245973450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:15:57,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091520876] [2022-11-20 21:15:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 21:15:57,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:15:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:15:57,227 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:15:57,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4f5544-ee55-4205-88a6-889dfe5193f5/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-11-20 21:15:57,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 21:15:57,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:15:57,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 21:15:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:15:58,087 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-20 21:15:58,087 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-20 21:15:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:15:58,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:16:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:16:00,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091520876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:16:00,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:16:00,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27, 27, 27] total 70 [2022-11-20 21:16:00,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018473235] [2022-11-20 21:16:00,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:16:00,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-20 21:16:00,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:16:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-20 21:16:00,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3779, Unknown=0, NotChecked=0, Total=5112 [2022-11-20 21:16:00,669 INFO L87 Difference]: Start difference. First operand 775 states and 2434 transitions. Second operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)