./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:16:48,579 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:16:48,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:16:48,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:16:48,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:16:48,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:16:48,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:16:48,600 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:16:48,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:16:48,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:16:48,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:16:48,603 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:16:48,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:16:48,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:16:48,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:16:48,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:16:48,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:16:48,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:16:48,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:16:48,609 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:16:48,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:16:48,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:16:48,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:16:48,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:16:48,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:16:48,615 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:16:48,616 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:16:48,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:16:48,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:16:48,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:16:48,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:16:48,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:16:48,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:16:48,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:16:48,620 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:16:48,620 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:16:48,621 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:16:48,621 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:16:48,621 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:16:48,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:16:48,622 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:16:48,623 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:16:48,639 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:16:48,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:16:48,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:16:48,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:16:48,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:16:48,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:16:48,640 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:16:48,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:16:48,641 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:16:48,641 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:16:48,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:16:48,642 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:16:48,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:16:48,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:16:48,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:16:48,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:16:48,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:16:48,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:16:48,644 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:16:48,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:16:48,645 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:16:48,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:16:48,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:16:48,645 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_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-12-14 08:16:48,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:16:48,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:16:48,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:16:48,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:16:48,821 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:16:48,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-14 08:16:51,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:16:51,564 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:16:51,565 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-14 08:16:51,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/700036750/ea901d4609aa40eba10841706394652b/FLAGeafb79181 [2022-12-14 08:16:51,580 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/700036750/ea901d4609aa40eba10841706394652b [2022-12-14 08:16:51,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:16:51,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:16:51,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:16:51,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:16:51,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:16:51,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:16:51" (1/1) ... [2022-12-14 08:16:51,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fec3526 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:51, skipping insertion in model container [2022-12-14 08:16:51,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:16:51" (1/1) ... [2022-12-14 08:16:51,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:16:51,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:16:51,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:51,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:51,735 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:51,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:51,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:51,739 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:51,740 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:51,741 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:51,742 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:51,742 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:51,750 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_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-14 08:16:51,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:16:51,769 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 08:16:51,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b3cb963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:51, skipping insertion in model container [2022-12-14 08:16:51,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:16:51,770 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 08:16:51,771 INFO L158 Benchmark]: Toolchain (without parser) took 186.58ms. Allocated memory is still 121.6MB. Free memory was 91.1MB in the beginning and 80.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:16:51,772 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:16:51,772 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.65ms. Allocated memory is still 121.6MB. Free memory was 91.1MB in the beginning and 80.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:16:51,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 121.6MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 184.65ms. Allocated memory is still 121.6MB. Free memory was 91.1MB in the beginning and 80.8MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 119]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:16:53,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:16:53,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:16:53,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:16:53,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:16:53,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:16:53,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:16:53,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:16:53,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:16:53,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:16:53,088 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:16:53,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:16:53,089 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:16:53,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:16:53,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:16:53,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:16:53,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:16:53,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:16:53,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:16:53,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:16:53,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:16:53,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:16:53,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:16:53,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:16:53,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:16:53,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:16:53,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:16:53,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:16:53,101 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:16:53,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:16:53,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:16:53,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:16:53,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:16:53,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:16:53,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:16:53,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:16:53,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:16:53,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:16:53,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:16:53,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:16:53,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:16:53,114 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 08:16:53,131 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:16:53,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:16:53,131 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:16:53,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:16:53,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:16:53,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:16:53,132 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:16:53,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:16:53,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:16:53,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:16:53,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:16:53,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:16:53,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:16:53,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:16:53,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:16:53,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:16:53,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:16:53,136 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:16:53,136 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:53,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:16:53,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:16:53,136 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_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b6872adb14a2dfa535a444bb6d903bd37f60f26cf718935f2927b47d5c5a6aaa [2022-12-14 08:16:53,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:16:53,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:16:53,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:16:53,396 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:16:53,396 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:16:53,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-14 08:16:55,916 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:16:56,075 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:16:56,075 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c [2022-12-14 08:16:56,081 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/c673c7653/b7f0a3c7559c4e30afe9f8e376e30f6b/FLAG3319a54cc [2022-12-14 08:16:56,470 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/data/c673c7653/b7f0a3c7559c4e30afe9f8e376e30f6b [2022-12-14 08:16:56,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:16:56,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:16:56,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:16:56,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:16:56,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:16:56,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b064ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56, skipping insertion in model container [2022-12-14 08:16:56,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:16:56,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:16:56,632 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,633 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,634 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,637 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,639 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,652 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_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-14 08:16:56,662 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:16:56,675 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 08:16:56,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:16:56,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,683 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,686 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,690 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_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-14 08:16:56,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:16:56,697 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:16:56,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,710 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,710 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:16:56,711 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:16:56,714 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_1c731046-6a91-4da2-96ba-4a30c26960a7/sv-benchmarks/c/weaver/popl20-more-multiply-verify.wvr.c[3042,3055] [2022-12-14 08:16:56,723 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:16:56,734 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:16:56,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56 WrapperNode [2022-12-14 08:16:56,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:16:56,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:16:56,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:16:56,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:16:56,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,753 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,769 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 176 [2022-12-14 08:16:56,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:16:56,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:16:56,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:16:56,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:16:56,777 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,780 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,780 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,790 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:16:56,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:16:56,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:16:56,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:16:56,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (1/1) ... [2022-12-14 08:16:56,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:16:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:56,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:16:56,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 08:16:56,845 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 08:16:56,845 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 08:16:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 08:16:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:16:56,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:16:56,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 08:16:56,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 08:16:56,944 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:16:56,946 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:16:57,364 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:16:57,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:16:57,462 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:16:57,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:16:57 BoogieIcfgContainer [2022-12-14 08:16:57,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:16:57,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:16:57,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:16:57,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:16:57,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:16:56" (1/3) ... [2022-12-14 08:16:57,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51688258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:16:57, skipping insertion in model container [2022-12-14 08:16:57,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:16:56" (2/3) ... [2022-12-14 08:16:57,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51688258 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:16:57, skipping insertion in model container [2022-12-14 08:16:57,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:16:57" (3/3) ... [2022-12-14 08:16:57,472 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2022-12-14 08:16:57,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:16:57,490 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2022-12-14 08:16:57,490 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 08:16:57,559 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 08:16:57,591 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 08:16:57,606 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 177 transitions, 378 flow [2022-12-14 08:16:57,608 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 177 transitions, 378 flow [2022-12-14 08:16:57,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 177 transitions, 378 flow [2022-12-14 08:16:57,670 INFO L130 PetriNetUnfolder]: 9/174 cut-off events. [2022-12-14 08:16:57,670 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 08:16:57,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 9/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 191 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 125. Up to 2 conditions per place. [2022-12-14 08:16:57,677 INFO L119 LiptonReduction]: Number of co-enabled transitions 2516 [2022-12-14 08:17:16,635 INFO L134 LiptonReduction]: Checked pairs total: 3147 [2022-12-14 08:17:16,635 INFO L136 LiptonReduction]: Total number of compositions: 170 [2022-12-14 08:17:16,640 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 49 transitions, 122 flow [2022-12-14 08:17:16,685 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 874 states, 670 states have (on average 4.3059701492537314) internal successors, (2885), 873 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:16,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:17:16,702 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;@4c264362, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:17:16,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2022-12-14 08:17:16,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 874 states, 670 states have (on average 4.3059701492537314) internal successors, (2885), 873 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:17:16,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:16,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:17:16,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:16,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:16,712 INFO L85 PathProgramCache]: Analyzing trace with hash 24727, now seen corresponding path program 1 times [2022-12-14 08:17:16,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:16,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2138328148] [2022-12-14 08:17:16,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:16,721 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:16,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:16,723 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:16,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 08:17:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:16,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:17:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:16,973 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:16,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:17,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:17,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2138328148] [2022-12-14 08:17:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2138328148] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:17,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:17,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:17,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756162979] [2022-12-14 08:17:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:17,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:17,042 INFO L87 Difference]: Start difference. First operand has 874 states, 670 states have (on average 4.3059701492537314) internal successors, (2885), 873 states have internal predecessors, (2885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:17,440 INFO L93 Difference]: Finished difference Result 1496 states and 4880 transitions. [2022-12-14 08:17:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:17,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:17:17,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:17,460 INFO L225 Difference]: With dead ends: 1496 [2022-12-14 08:17:17,460 INFO L226 Difference]: Without dead ends: 1496 [2022-12-14 08:17:17,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:17,463 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:17,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:17:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-12-14 08:17:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 750. [2022-12-14 08:17:17,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 582 states have (on average 4.202749140893471) internal successors, (2446), 749 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2446 transitions. [2022-12-14 08:17:17,528 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2446 transitions. Word has length 2 [2022-12-14 08:17:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:17,528 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2446 transitions. [2022-12-14 08:17:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2446 transitions. [2022-12-14 08:17:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:17:17,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:17,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:17:17,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:17:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:17,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:17,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:17,733 INFO L85 PathProgramCache]: Analyzing trace with hash 24819, now seen corresponding path program 1 times [2022-12-14 08:17:17,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:17,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802397630] [2022-12-14 08:17:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:17,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:17,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:17,739 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 08:17:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:17:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:17,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:18,015 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 08:17:18,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 08:17:18,038 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 08:17:18,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 08:17:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:18,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:18,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:18,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802397630] [2022-12-14 08:17:18,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802397630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:18,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:18,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:18,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336107743] [2022-12-14 08:17:18,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:18,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:18,085 INFO L87 Difference]: Start difference. First operand 750 states and 2446 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:18,312 INFO L93 Difference]: Finished difference Result 624 states and 1969 transitions. [2022-12-14 08:17:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:17:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:18,316 INFO L225 Difference]: With dead ends: 624 [2022-12-14 08:17:18,316 INFO L226 Difference]: Without dead ends: 624 [2022-12-14 08:17:18,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:18,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:18,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:17:18,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-12-14 08:17:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-12-14 08:17:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 493 states have (on average 3.993914807302231) internal successors, (1969), 623 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1969 transitions. [2022-12-14 08:17:18,342 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1969 transitions. Word has length 2 [2022-12-14 08:17:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:18,343 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 1969 transitions. [2022-12-14 08:17:18,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1969 transitions. [2022-12-14 08:17:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:17:18,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:18,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:17:18,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 08:17:18,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:18,545 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:18,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:18,548 INFO L85 PathProgramCache]: Analyzing trace with hash 24821, now seen corresponding path program 1 times [2022-12-14 08:17:18,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:18,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421210466] [2022-12-14 08:17:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:18,553 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:18,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 08:17:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:18,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:17:18,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:18,780 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-12-14 08:17:18,780 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-12-14 08:17:18,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:18,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:18,814 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:18,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421210466] [2022-12-14 08:17:18,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421210466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:18,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:18,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:18,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183713484] [2022-12-14 08:17:18,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:18,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:18,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:18,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:18,816 INFO L87 Difference]: Start difference. First operand 624 states and 1969 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:18,971 INFO L93 Difference]: Finished difference Result 498 states and 1492 transitions. [2022-12-14 08:17:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:18,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:17:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:18,976 INFO L225 Difference]: With dead ends: 498 [2022-12-14 08:17:18,976 INFO L226 Difference]: Without dead ends: 498 [2022-12-14 08:17:18,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:18,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:18,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-12-14 08:17:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-12-14 08:17:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 404 states have (on average 3.6930693069306932) internal successors, (1492), 497 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1492 transitions. [2022-12-14 08:17:18,995 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1492 transitions. Word has length 2 [2022-12-14 08:17:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:18,995 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1492 transitions. [2022-12-14 08:17:18,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1492 transitions. [2022-12-14 08:17:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:17:18,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:18,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:17:19,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 08:17:19,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:19,198 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash 24726, now seen corresponding path program 1 times [2022-12-14 08:17:19,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:19,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778572826] [2022-12-14 08:17:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:19,203 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:19,206 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:19,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 08:17:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:17:19,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:19,441 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 08:17:19,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 08:17:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:19,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:19,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:19,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778572826] [2022-12-14 08:17:19,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778572826] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:19,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:19,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:19,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711231055] [2022-12-14 08:17:19,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:19,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:19,454 INFO L87 Difference]: Start difference. First operand 498 states and 1492 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:19,594 INFO L93 Difference]: Finished difference Result 497 states and 1490 transitions. [2022-12-14 08:17:19,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:17:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:19,597 INFO L225 Difference]: With dead ends: 497 [2022-12-14 08:17:19,597 INFO L226 Difference]: Without dead ends: 497 [2022-12-14 08:17:19,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:19,598 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:19,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-12-14 08:17:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-12-14 08:17:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 404 states have (on average 3.6881188118811883) internal successors, (1490), 496 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1490 transitions. [2022-12-14 08:17:19,609 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1490 transitions. Word has length 2 [2022-12-14 08:17:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:19,609 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1490 transitions. [2022-12-14 08:17:19,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1490 transitions. [2022-12-14 08:17:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:17:19,609 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:19,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:17:19,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 08:17:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:19,810 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash 769564, now seen corresponding path program 1 times [2022-12-14 08:17:19,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:19,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762940302] [2022-12-14 08:17:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:19,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:19,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:19,812 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:19,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 08:17:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:17:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:19,970 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:19,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762940302] [2022-12-14 08:17:20,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762940302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [475517699] [2022-12-14 08:17:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:20,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:20,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 08:17:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:17:20,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:20,413 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:20,414 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [475517699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:20,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236913089] [2022-12-14 08:17:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:20,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:20,493 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:20,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:17:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:17:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:20,628 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:20,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:20,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236913089] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:20,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:20,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 08:17:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802598231] [2022-12-14 08:17:20,766 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:17:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:17:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:17:20,767 INFO L87 Difference]: Start difference. First operand 497 states and 1490 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:22,063 INFO L93 Difference]: Finished difference Result 1979 states and 5948 transitions. [2022-12-14 08:17:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:17:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:17:22,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:22,071 INFO L225 Difference]: With dead ends: 1979 [2022-12-14 08:17:22,071 INFO L226 Difference]: Without dead ends: 1979 [2022-12-14 08:17:22,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:17:22,072 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 279 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:22,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:17:22,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-12-14 08:17:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 500. [2022-12-14 08:17:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 407 states have (on average 3.675675675675676) internal successors, (1496), 499 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1496 transitions. [2022-12-14 08:17:22,093 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1496 transitions. Word has length 3 [2022-12-14 08:17:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:22,093 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1496 transitions. [2022-12-14 08:17:22,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1496 transitions. [2022-12-14 08:17:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:17:22,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:22,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:17:22,100 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 08:17:22,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:17:22,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 08:17:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:22,696 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 23870426, now seen corresponding path program 1 times [2022-12-14 08:17:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:22,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [445155575] [2022-12-14 08:17:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:22,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:22,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:22,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:22,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 08:17:22,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:17:22,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:22,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:22,856 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 08:17:22,857 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 08:17:22,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 08:17:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:22,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:22,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:22,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [445155575] [2022-12-14 08:17:22,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [445155575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:22,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:22,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246239595] [2022-12-14 08:17:22,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:22,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:22,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:22,931 INFO L87 Difference]: Start difference. First operand 500 states and 1496 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:23,069 INFO L93 Difference]: Finished difference Result 470 states and 1416 transitions. [2022-12-14 08:17:23,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:17:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:23,072 INFO L225 Difference]: With dead ends: 470 [2022-12-14 08:17:23,072 INFO L226 Difference]: Without dead ends: 470 [2022-12-14 08:17:23,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:23,073 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:23,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-12-14 08:17:23,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-12-14 08:17:23,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 392 states have (on average 3.6122448979591835) internal successors, (1416), 469 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1416 transitions. [2022-12-14 08:17:23,084 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1416 transitions. Word has length 4 [2022-12-14 08:17:23,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:23,085 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1416 transitions. [2022-12-14 08:17:23,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,085 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1416 transitions. [2022-12-14 08:17:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 08:17:23,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:23,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 08:17:23,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2022-12-14 08:17:23,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:23,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash 23870427, now seen corresponding path program 1 times [2022-12-14 08:17:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:23,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825594230] [2022-12-14 08:17:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:23,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:23,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:23,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 08:17:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:23,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:17:23,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:23,426 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-14 08:17:23,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 44 [2022-12-14 08:17:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:23,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:23,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825594230] [2022-12-14 08:17:23,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825594230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:23,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:23,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:23,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826292971] [2022-12-14 08:17:23,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:23,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:23,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:23,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:23,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:23,445 INFO L87 Difference]: Start difference. First operand 470 states and 1416 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:23,551 INFO L93 Difference]: Finished difference Result 440 states and 1336 transitions. [2022-12-14 08:17:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:23,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-12-14 08:17:23,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:23,553 INFO L225 Difference]: With dead ends: 440 [2022-12-14 08:17:23,553 INFO L226 Difference]: Without dead ends: 440 [2022-12-14 08:17:23,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:23,553 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:23,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-12-14 08:17:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-12-14 08:17:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 3.543766578249337) internal successors, (1336), 439 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1336 transitions. [2022-12-14 08:17:23,565 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1336 transitions. Word has length 4 [2022-12-14 08:17:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:23,565 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1336 transitions. [2022-12-14 08:17:23,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1336 transitions. [2022-12-14 08:17:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:17:23,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:23,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:17:23,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 08:17:23,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:23,767 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:23,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:23,768 INFO L85 PathProgramCache]: Analyzing trace with hash 739982198, now seen corresponding path program 1 times [2022-12-14 08:17:23,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573952848] [2022-12-14 08:17:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:23,770 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:23,773 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:23,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 08:17:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:17:23,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:23,904 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 08:17:23,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 08:17:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:23,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:23,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:23,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573952848] [2022-12-14 08:17:23,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573952848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:23,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:23,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:17:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338370679] [2022-12-14 08:17:23,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:17:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:17:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:17:23,922 INFO L87 Difference]: Start difference. First operand 440 states and 1336 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:24,077 INFO L93 Difference]: Finished difference Result 258 states and 755 transitions. [2022-12-14 08:17:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:17:24,077 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 [2022-12-14 08:17:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:24,078 INFO L225 Difference]: With dead ends: 258 [2022-12-14 08:17:24,078 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 08:17:24,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:17:24,079 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:24,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 08:17:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-12-14 08:17:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 231 states have (on average 3.2683982683982684) internal successors, (755), 257 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 755 transitions. [2022-12-14 08:17:24,085 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 755 transitions. Word has length 5 [2022-12-14 08:17:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:24,085 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 755 transitions. [2022-12-14 08:17:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 755 transitions. [2022-12-14 08:17:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:17:24,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:24,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:17:24,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 08:17:24,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:24,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash 739982199, now seen corresponding path program 1 times [2022-12-14 08:17:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:24,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568297196] [2022-12-14 08:17:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:24,291 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:24,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:24,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 08:17:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:17:24,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:24,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:24,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:24,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:24,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568297196] [2022-12-14 08:17:24,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568297196] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:24,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:24,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:17:24,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31852101] [2022-12-14 08:17:24,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:24,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:17:24,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:24,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:17:24,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:17:24,404 INFO L87 Difference]: Start difference. First operand 258 states and 755 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:24,651 INFO L93 Difference]: Finished difference Result 287 states and 832 transitions. [2022-12-14 08:17:24,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:17:24,651 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 [2022-12-14 08:17:24,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:24,652 INFO L225 Difference]: With dead ends: 287 [2022-12-14 08:17:24,652 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 08:17:24,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:17:24,653 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:24,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:17:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 08:17:24,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-12-14 08:17:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 248 states have (on average 3.2096774193548385) internal successors, (796), 274 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 796 transitions. [2022-12-14 08:17:24,659 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 796 transitions. Word has length 5 [2022-12-14 08:17:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:24,660 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 796 transitions. [2022-12-14 08:17:24,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 796 transitions. [2022-12-14 08:17:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:17:24,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:24,660 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 08:17:24,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 08:17:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:24,862 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:24,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1454250455, now seen corresponding path program 2 times [2022-12-14 08:17:24,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1727391432] [2022-12-14 08:17:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:17:24,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:24,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:24,867 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:24,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 08:17:24,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:17:24,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:24,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:17:24,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:25,073 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:25,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:25,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:25,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:25,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1727391432] [2022-12-14 08:17:25,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1727391432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:25,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1409365498] [2022-12-14 08:17:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:17:25,733 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:25,734 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:25,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-12-14 08:17:25,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:17:25,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:25,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:17:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:25,961 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:25,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:26,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:26,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1409365498] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403441885] [2022-12-14 08:17:26,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:17:26,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:26,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:26,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:26,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 08:17:26,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:17:26,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:26,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:17:26,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:26,269 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:26,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:26,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:27,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403441885] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:27,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:27,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 08:17:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530922348] [2022-12-14 08:17:27,011 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:17:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:17:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:17:27,012 INFO L87 Difference]: Start difference. First operand 275 states and 796 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:31,334 INFO L93 Difference]: Finished difference Result 2289 states and 6752 transitions. [2022-12-14 08:17:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:17:31,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:17:31,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:31,342 INFO L225 Difference]: With dead ends: 2289 [2022-12-14 08:17:31,342 INFO L226 Difference]: Without dead ends: 2289 [2022-12-14 08:17:31,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:17:31,342 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 910 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:31,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 0 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-12-14 08:17:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2022-12-14 08:17:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 281. [2022-12-14 08:17:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 254 states have (on average 3.1811023622047245) internal successors, (808), 280 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 808 transitions. [2022-12-14 08:17:31,356 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 808 transitions. Word has length 6 [2022-12-14 08:17:31,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:31,356 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 808 transitions. [2022-12-14 08:17:31,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:31,356 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 808 transitions. [2022-12-14 08:17:31,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:17:31,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:31,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:17:31,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2022-12-14 08:17:31,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 08:17:31,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 08:17:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:31,958 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1454584786, now seen corresponding path program 1 times [2022-12-14 08:17:31,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:31,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505121027] [2022-12-14 08:17:31,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:31,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:31,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:31,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:31,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 08:17:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:32,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:17:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:32,145 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:32,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:32,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:32,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505121027] [2022-12-14 08:17:32,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [505121027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:32,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1630590864] [2022-12-14 08:17:32,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:32,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:32,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:32,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:32,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 08:17:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:17:32,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:33,077 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:33,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:33,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:33,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1630590864] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:33,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566623125] [2022-12-14 08:17:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:33,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:33,399 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:33,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:17:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:33,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:17:33,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:33,565 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:33,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:33,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:33,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566623125] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:33,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:33,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-12-14 08:17:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567634553] [2022-12-14 08:17:33,822 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:33,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:17:33,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:17:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:17:33,823 INFO L87 Difference]: Start difference. First operand 281 states and 808 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:37,216 INFO L93 Difference]: Finished difference Result 509 states and 1441 transitions. [2022-12-14 08:17:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:17:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:17:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:37,219 INFO L225 Difference]: With dead ends: 509 [2022-12-14 08:17:37,219 INFO L226 Difference]: Without dead ends: 508 [2022-12-14 08:17:37,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:17:37,220 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 219 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:37,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 0 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 08:17:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-12-14 08:17:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 452. [2022-12-14 08:17:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 423 states have (on average 3.182033096926714) internal successors, (1346), 451 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1346 transitions. [2022-12-14 08:17:37,228 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1346 transitions. Word has length 6 [2022-12-14 08:17:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 1346 transitions. [2022-12-14 08:17:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1346 transitions. [2022-12-14 08:17:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:17:37,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:37,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:17:37,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 08:17:37,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 08:17:37,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-12-14 08:17:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:37,831 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:37,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1464663191, now seen corresponding path program 1 times [2022-12-14 08:17:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:37,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005767857] [2022-12-14 08:17:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:37,834 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:37,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:37,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:37,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 08:17:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:37,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:17:37,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:37,980 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 08:17:37,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 08:17:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:38,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:38,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:38,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005767857] [2022-12-14 08:17:38,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005767857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:38,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:38,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833020252] [2022-12-14 08:17:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:38,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:38,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:38,001 INFO L87 Difference]: Start difference. First operand 452 states and 1346 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) [2022-12-14 08:17:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:38,120 INFO L93 Difference]: Finished difference Result 419 states and 1243 transitions. [2022-12-14 08:17:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:38,120 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 [2022-12-14 08:17:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:38,122 INFO L225 Difference]: With dead ends: 419 [2022-12-14 08:17:38,122 INFO L226 Difference]: Without dead ends: 419 [2022-12-14 08:17:38,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:38,122 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:38,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-12-14 08:17:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 419. [2022-12-14 08:17:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 398 states have (on average 3.1231155778894473) internal successors, (1243), 418 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1243 transitions. [2022-12-14 08:17:38,128 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1243 transitions. Word has length 6 [2022-12-14 08:17:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:38,129 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 1243 transitions. [2022-12-14 08:17:38,129 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) [2022-12-14 08:17:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1243 transitions. [2022-12-14 08:17:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:17:38,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:38,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:17:38,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-14 08:17:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:38,330 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1464663192, now seen corresponding path program 1 times [2022-12-14 08:17:38,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:38,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323520672] [2022-12-14 08:17:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:38,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:38,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:38,337 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:38,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 08:17:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:17:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:38,517 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 08:17:38,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 08:17:38,533 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 130 treesize of output 126 [2022-12-14 08:17:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:38,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:38,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:38,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323520672] [2022-12-14 08:17:38,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323520672] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:38,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:38,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:17:38,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399054085] [2022-12-14 08:17:38,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:38,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:17:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:17:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:38,581 INFO L87 Difference]: Start difference. First operand 419 states and 1243 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) [2022-12-14 08:17:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:38,691 INFO L93 Difference]: Finished difference Result 386 states and 1140 transitions. [2022-12-14 08:17:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:17:38,692 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 [2022-12-14 08:17:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:38,693 INFO L225 Difference]: With dead ends: 386 [2022-12-14 08:17:38,693 INFO L226 Difference]: Without dead ends: 327 [2022-12-14 08:17:38,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:17:38,694 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:38,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:17:38,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-12-14 08:17:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-12-14 08:17:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 314 states have (on average 3.171974522292994) internal successors, (996), 326 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:38,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 996 transitions. [2022-12-14 08:17:38,699 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 996 transitions. Word has length 6 [2022-12-14 08:17:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:38,699 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 996 transitions. [2022-12-14 08:17:38,699 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) [2022-12-14 08:17:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 996 transitions. [2022-12-14 08:17:38,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:17:38,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:38,700 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2022-12-14 08:17:38,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-14 08:17:38,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:38,901 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:38,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:38,902 INFO L85 PathProgramCache]: Analyzing trace with hash 243530295, now seen corresponding path program 2 times [2022-12-14 08:17:38,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:38,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063266591] [2022-12-14 08:17:38,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:17:38,904 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:38,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:38,907 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:38,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 08:17:38,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 08:17:38,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:39,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:17:39,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:39,092 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:39,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:17:39,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:17:39,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063266591] [2022-12-14 08:17:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063266591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:17:39,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:17:39,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:17:39,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25230199] [2022-12-14 08:17:39,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:17:39,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:17:39,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:17:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:17:39,161 INFO L87 Difference]: Start difference. First operand 327 states and 996 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) [2022-12-14 08:17:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:39,405 INFO L93 Difference]: Finished difference Result 155 states and 428 transitions. [2022-12-14 08:17:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:17:39,405 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 9 [2022-12-14 08:17:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:39,407 INFO L225 Difference]: With dead ends: 155 [2022-12-14 08:17:39,407 INFO L226 Difference]: Without dead ends: 155 [2022-12-14 08:17:39,407 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 [2022-12-14 08:17:39,408 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:39,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:17:39,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-12-14 08:17:39,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 92. [2022-12-14 08:17:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 2.611111111111111) internal successors, (235), 91 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:39,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2022-12-14 08:17:39,410 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 9 [2022-12-14 08:17:39,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:39,410 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2022-12-14 08:17:39,410 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) [2022-12-14 08:17:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2022-12-14 08:17:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:17:39,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:39,410 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 08:17:39,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 08:17:39,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:39,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:17:39,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:39,611 INFO L85 PathProgramCache]: Analyzing trace with hash -555859017, now seen corresponding path program 3 times [2022-12-14 08:17:39,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:39,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686095102] [2022-12-14 08:17:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:17:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:39,613 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:39,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 08:17:39,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:17:39,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:17:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:39,884 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:39,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:40,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:42,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686095102] [2022-12-14 08:17:42,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686095102] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476637901] [2022-12-14 08:17:42,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:17:42,731 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:42,732 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:42,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 08:17:43,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:17:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:17:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:43,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:43,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:43,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:46,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [476637901] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:46,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076787131] [2022-12-14 08:17:46,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:17:46,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:46,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:46,487 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:46,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 08:17:47,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:17:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:17:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:17:47,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:47,561 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:17:47,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:17:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:47,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:51,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076787131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:51,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:51,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 40 [2022-12-14 08:17:51,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374493251] [2022-12-14 08:17:51,638 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:51,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 08:17:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 08:17:51,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 08:17:51,639 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2022-12-14 08:18:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:18:10,488 INFO L93 Difference]: Finished difference Result 1605 states and 4306 transitions. [2022-12-14 08:18:10,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:18:10,489 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 [2022-12-14 08:18:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:18:10,494 INFO L225 Difference]: With dead ends: 1605 [2022-12-14 08:18:10,494 INFO L226 Difference]: Without dead ends: 1605 [2022-12-14 08:18:10,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=782, Invalid=1870, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 08:18:10,495 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4780 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2876 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4780 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:18:10,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4780 Valid, 0 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2876 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-12-14 08:18:10,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2022-12-14 08:18:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 104. [2022-12-14 08:18:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 2.5392156862745097) internal successors, (259), 103 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:18:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 259 transitions. [2022-12-14 08:18:10,503 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 259 transitions. Word has length 12 [2022-12-14 08:18:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:18:10,503 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 259 transitions. [2022-12-14 08:18:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2022-12-14 08:18:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 259 transitions. [2022-12-14 08:18:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 08:18:10,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:18:10,504 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:18:10,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-12-14 08:18:10,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 08:18:10,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 08:18:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:18:11,107 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2022-12-14 08:18:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:18:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash -49345756, now seen corresponding path program 1 times [2022-12-14 08:18:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:18:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585714774] [2022-12-14 08:18:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:18:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:18:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:18:11,111 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:18:11,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c731046-6a91-4da2-96ba-4a30c26960a7/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 08:18:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:18:11,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 08:18:11,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:18:11,360 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 08:18:11,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 08:18:11,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:18:11,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:18:11,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 245 treesize of output 59 [2022-12-14 08:18:12,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:18:12,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:18:13,216 INFO L321 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2022-12-14 08:18:13,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 178 treesize of output 244