./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-3.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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- 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 07:53:01,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:53:01,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:53:01,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:53:01,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:53:01,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:53:01,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:53:01,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:53:01,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:53:01,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:53:01,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:53:01,147 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:53:01,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:53:01,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:53:01,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:53:01,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:53:01,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:53:01,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:53:01,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:53:01,155 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:53:01,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:53:01,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:53:01,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:53:01,160 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:53:01,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:53:01,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:53:01,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:53:01,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:53:01,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:53:01,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:53:01,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:53:01,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:53:01,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:53:01,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:53:01,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:53:01,171 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:53:01,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:53:01,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:53:01,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:53:01,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:53:01,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:53:01,173 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 07:53:01,194 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:53:01,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:53:01,195 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:53:01,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:53:01,195 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:53:01,196 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:53:01,196 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:53:01,196 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:53:01,196 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:53:01,196 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:53:01,197 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:53:01,197 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:53:01,197 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:53:01,197 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:53:01,197 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:53:01,198 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:53:01,198 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:53:01,198 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:53:01,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:53:01,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:53:01,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:53:01,199 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:53:01,199 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:53:01,199 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:53:01,199 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:53:01,200 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:53:01,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:53:01,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:53:01,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:53:01,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:53:01,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:53:01,202 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-12-14 07:53:01,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:53:01,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:53:01,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:53:01,407 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:53:01,407 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:53:01,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-14 07:53:03,957 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:53:04,105 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:53:04,105 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-14 07:53:04,110 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/06c5cfbe3/f156e944e0484b5fa4dd6c58fb0394d1/FLAGe7fde1b69 [2022-12-14 07:53:04,121 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/06c5cfbe3/f156e944e0484b5fa4dd6c58fb0394d1 [2022-12-14 07:53:04,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:53:04,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:53:04,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:04,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:53:04,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:53:04,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:04" (1/1) ... [2022-12-14 07:53:04,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cd241c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:04, skipping insertion in model container [2022-12-14 07:53:04,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:04" (1/1) ... [2022-12-14 07:53:04,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:53:04,147 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:53:04,263 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-14 07:53:04,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:04,277 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 07:53:04,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@177eb0a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:04, skipping insertion in model container [2022-12-14 07:53:04,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:04,277 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 07:53:04,279 INFO L158 Benchmark]: Toolchain (without parser) took 154.29ms. Allocated memory is still 148.9MB. Free memory was 109.2MB in the beginning and 99.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 07:53:04,279 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 148.9MB. Free memory is still 92.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:53:04,279 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.62ms. Allocated memory is still 148.9MB. Free memory was 109.2MB in the beginning and 99.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 07:53:04,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 148.9MB. Free memory is still 92.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.62ms. Allocated memory is still 148.9MB. Free memory was 109.2MB in the beginning and 99.6MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 --- 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 07:53:05,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:53:05,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:53:05,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:53:05,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:53:05,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:53:05,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:53:05,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:53:05,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:53:05,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:53:05,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:53:05,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:53:05,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:53:05,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:53:05,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:53:05,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:53:05,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:53:05,759 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:53:05,760 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:53:05,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:53:05,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:53:05,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:53:05,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:53:05,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:53:05,770 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:53:05,770 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:53:05,771 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:53:05,772 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:53:05,772 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:53:05,773 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:53:05,773 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:53:05,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:53:05,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:53:05,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:53:05,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:53:05,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:53:05,776 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:53:05,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:53:05,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:53:05,778 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:53:05,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:53:05,779 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 07:53:05,800 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:53:05,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:53:05,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:53:05,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:53:05,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:53:05,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:53:05,802 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:53:05,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:53:05,802 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:53:05,802 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:53:05,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:53:05,803 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:53:05,803 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 07:53:05,804 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 07:53:05,804 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:53:05,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 07:53:05,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:53:05,806 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:53:05,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 07:53:05,806 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 199b95a7803e428766b942c5c5c486b02a8ea32baf687cdef6ce754bef283884 [2022-12-14 07:53:06,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:53:06,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:53:06,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:53:06,082 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:53:06,082 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:53:06,083 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-14 07:53:08,630 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:53:08,816 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:53:08,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c [2022-12-14 07:53:08,823 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/7ce0517fc/270afaff0b1b407ab4afbc95ae46b3bc/FLAGbf646eae1 [2022-12-14 07:53:08,836 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/data/7ce0517fc/270afaff0b1b407ab4afbc95ae46b3bc [2022-12-14 07:53:08,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:53:08,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:53:08,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:08,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:53:08,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:53:08,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:08" (1/1) ... [2022-12-14 07:53:08,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fb24df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:08, skipping insertion in model container [2022-12-14 07:53:08,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:08" (1/1) ... [2022-12-14 07:53:08,851 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:53:08,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:53:08,988 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-14 07:53:08,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:09,005 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 07:53:09,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:53:09,017 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-14 07:53:09,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:09,024 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:53:09,040 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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/sv-benchmarks/c/weaver/unroll-3.wvr.c[2500,2513] [2022-12-14 07:53:09,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:09,054 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:53:09,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09 WrapperNode [2022-12-14 07:53:09,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:09,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:53:09,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:53:09,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:53:09,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,087 INFO L138 Inliner]: procedures = 26, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 142 [2022-12-14 07:53:09,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:53:09,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:53:09,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:53:09,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:53:09,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,097 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,098 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,108 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:53:09,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:53:09,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:53:09,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:53:09,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (1/1) ... [2022-12-14 07:53:09,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:53:09,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:09,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:53:09,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:53:09,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 07:53:09,173 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 07:53:09,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:53:09,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:53:09,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:53:09,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:53:09,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 07:53:09,175 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 07:53:09,274 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:53:09,276 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:53:09,660 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:53:09,667 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:53:09,668 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 07:53:09,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:53:09 BoogieIcfgContainer [2022-12-14 07:53:09,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:53:09,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:53:09,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:53:09,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:53:09,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:53:08" (1/3) ... [2022-12-14 07:53:09,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b64dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:53:09, skipping insertion in model container [2022-12-14 07:53:09,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:09" (2/3) ... [2022-12-14 07:53:09,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b64dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:53:09, skipping insertion in model container [2022-12-14 07:53:09,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:53:09" (3/3) ... [2022-12-14 07:53:09,678 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2022-12-14 07:53:09,696 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:53:09,696 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-14 07:53:09,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:53:09,777 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 07:53:09,810 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:53:09,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 205 transitions, 426 flow [2022-12-14 07:53:09,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 205 transitions, 426 flow [2022-12-14 07:53:09,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 205 transitions, 426 flow [2022-12-14 07:53:09,903 INFO L130 PetriNetUnfolder]: 15/203 cut-off events. [2022-12-14 07:53:09,903 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 07:53:09,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 203 events. 15/203 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 265 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-12-14 07:53:09,912 INFO L119 LiptonReduction]: Number of co-enabled transitions 4028 [2022-12-14 07:53:29,414 INFO L134 LiptonReduction]: Checked pairs total: 3948 [2022-12-14 07:53:29,414 INFO L136 LiptonReduction]: Total number of compositions: 234 [2022-12-14 07:53:29,420 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 39 transitions, 94 flow [2022-12-14 07:53:29,439 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 246 states, 158 states have (on average 3.911392405063291) internal successors, (618), 245 states have internal predecessors, (618), 0 states have call successors, (0), 0 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 07:53:29,453 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:53:29,457 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;@2523ebb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:53:29,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2022-12-14 07:53:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 246 states, 158 states have (on average 3.911392405063291) internal successors, (618), 245 states have internal predecessors, (618), 0 states have call successors, (0), 0 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 07:53:29,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:29,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:29,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:29,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:29,467 INFO L85 PathProgramCache]: Analyzing trace with hash 26143, now seen corresponding path program 1 times [2022-12-14 07:53:29,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:29,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178521671] [2022-12-14 07:53:29,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:29,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:53:29,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:29,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:29,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:53:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:29,592 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 07:53:29,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:29,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178521671] [2022-12-14 07:53:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178521671] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:29,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:29,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:29,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265336841] [2022-12-14 07:53:29,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:29,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:29,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:29,619 INFO L87 Difference]: Start difference. First operand has 246 states, 158 states have (on average 3.911392405063291) internal successors, (618), 245 states have internal predecessors, (618), 0 states have call successors, (0), 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 07:53:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:29,831 INFO L93 Difference]: Finished difference Result 200 states and 494 transitions. [2022-12-14 07:53:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:29,834 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 07:53:29,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:29,841 INFO L225 Difference]: With dead ends: 200 [2022-12-14 07:53:29,841 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 07:53:29,842 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 07:53:29,844 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:29,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:53:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 07:53:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2022-12-14 07:53:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 133 states have (on average 3.7142857142857144) internal successors, (494), 197 states have internal predecessors, (494), 0 states have call successors, (0), 0 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 07:53:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 494 transitions. [2022-12-14 07:53:29,879 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 494 transitions. Word has length 2 [2022-12-14 07:53:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:29,879 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 494 transitions. [2022-12-14 07:53:29,879 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 07:53:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 494 transitions. [2022-12-14 07:53:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:29,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:29,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:29,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:30,084 INFO L85 PathProgramCache]: Analyzing trace with hash 25999, now seen corresponding path program 1 times [2022-12-14 07:53:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945028478] [2022-12-14 07:53:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:30,087 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:30,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:30,090 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:53:30,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:30,227 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:53:30,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 07:53:30,241 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 07:53:30,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:30,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:30,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945028478] [2022-12-14 07:53:30,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945028478] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:30,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:30,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:30,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492759509] [2022-12-14 07:53:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:30,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:30,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:30,244 INFO L87 Difference]: Start difference. First operand 198 states and 494 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 07:53:30,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:30,397 INFO L93 Difference]: Finished difference Result 197 states and 492 transitions. [2022-12-14 07:53:30,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:30,397 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 07:53:30,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:30,400 INFO L225 Difference]: With dead ends: 197 [2022-12-14 07:53:30,400 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 07:53:30,400 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 07:53:30,402 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:30,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 07:53:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-12-14 07:53:30,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 133 states have (on average 3.699248120300752) internal successors, (492), 196 states have internal predecessors, (492), 0 states have call successors, (0), 0 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 07:53:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 492 transitions. [2022-12-14 07:53:30,411 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 492 transitions. Word has length 2 [2022-12-14 07:53:30,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:30,411 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 492 transitions. [2022-12-14 07:53:30,412 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 07:53:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 492 transitions. [2022-12-14 07:53:30,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 07:53:30,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:30,412 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 07:53:30,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,614 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:30,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:30,616 INFO L85 PathProgramCache]: Analyzing trace with hash 26000, now seen corresponding path program 1 times [2022-12-14 07:53:30,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:30,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723205086] [2022-12-14 07:53:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:30,618 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:30,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:30,621 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:30,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:53:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:30,777 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:30,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:53:30,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:30,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:30,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723205086] [2022-12-14 07:53:30,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723205086] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:30,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:30,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:30,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938239174] [2022-12-14 07:53:30,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:30,797 INFO L87 Difference]: Start difference. First operand 197 states and 492 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 07:53:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:30,976 INFO L93 Difference]: Finished difference Result 197 states and 491 transitions. [2022-12-14 07:53:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:30,977 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 07:53:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:30,978 INFO L225 Difference]: With dead ends: 197 [2022-12-14 07:53:30,978 INFO L226 Difference]: Without dead ends: 197 [2022-12-14 07:53:30,978 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 07:53:30,979 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:30,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:53:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-14 07:53:30,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-12-14 07:53:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 133 states have (on average 3.691729323308271) internal successors, (491), 196 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 07:53:30,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 491 transitions. [2022-12-14 07:53:30,986 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 491 transitions. Word has length 2 [2022-12-14 07:53:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:30,987 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 491 transitions. [2022-12-14 07:53:30,993 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 07:53:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 491 transitions. [2022-12-14 07:53:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:53:30,993 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:30,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:53:31,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,195 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:31,195 INFO L85 PathProgramCache]: Analyzing trace with hash 808831, now seen corresponding path program 1 times [2022-12-14 07:53:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:31,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [287392701] [2022-12-14 07:53:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:31,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:31,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:53:31,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:31,288 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 07:53:31,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-14 07:53:31,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:31,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:31,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:31,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [287392701] [2022-12-14 07:53:31,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [287392701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:31,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:31,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:31,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117884701] [2022-12-14 07:53:31,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:31,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:31,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:31,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:31,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:31,337 INFO L87 Difference]: Start difference. First operand 197 states and 491 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:31,490 INFO L93 Difference]: Finished difference Result 161 states and 385 transitions. [2022-12-14 07:53:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:53:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:31,492 INFO L225 Difference]: With dead ends: 161 [2022-12-14 07:53:31,492 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 07:53:31,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:31,492 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:31,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 07:53:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-12-14 07:53:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 113 states have (on average 3.4070796460176993) internal successors, (385), 160 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 07:53:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 385 transitions. [2022-12-14 07:53:31,498 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 385 transitions. Word has length 3 [2022-12-14 07:53:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:31,498 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 385 transitions. [2022-12-14 07:53:31,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 385 transitions. [2022-12-14 07:53:31,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:53:31,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:31,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:53:31,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,701 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 808832, now seen corresponding path program 1 times [2022-12-14 07:53:31,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:31,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1272679659] [2022-12-14 07:53:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:31,704 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:31,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:31,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:31,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:53:31,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:31,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:53:31,929 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-12-14 07:53:31,929 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 14 treesize of output 26 [2022-12-14 07:53:31,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 07:53:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:32,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:32,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:32,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1272679659] [2022-12-14 07:53:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1272679659] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:32,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:32,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335444123] [2022-12-14 07:53:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:32,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:32,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:32,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:32,016 INFO L87 Difference]: Start difference. First operand 161 states and 385 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:32,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:32,157 INFO L93 Difference]: Finished difference Result 125 states and 279 transitions. [2022-12-14 07:53:32,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:32,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 07:53:32,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:32,159 INFO L225 Difference]: With dead ends: 125 [2022-12-14 07:53:32,159 INFO L226 Difference]: Without dead ends: 125 [2022-12-14 07:53:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:32,160 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:32,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:32,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-14 07:53:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-12-14 07:53:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 93 states have (on average 3.0) internal successors, (279), 124 states have internal predecessors, (279), 0 states have call successors, (0), 0 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 07:53:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 279 transitions. [2022-12-14 07:53:32,164 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 279 transitions. Word has length 3 [2022-12-14 07:53:32,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:32,164 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 279 transitions. [2022-12-14 07:53:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 279 transitions. [2022-12-14 07:53:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 07:53:32,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:32,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 07:53:32,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:32,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:32,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 808688, now seen corresponding path program 1 times [2022-12-14 07:53:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [519720548] [2022-12-14 07:53:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:32,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:32,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:32,372 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:32,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (7)] Waiting until timeout for monitored process [2022-12-14 07:53:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:32,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:53:32,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:32,500 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:32,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:32,563 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 07:53:32,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:53:32,761 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [519720548] [2022-12-14 07:53:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [519720548] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1570194206] [2022-12-14 07:53:32,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:32,762 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:32,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:32,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:32,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 07:53:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 07:53:32,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:32,888 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:32,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:32,922 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 07:53:32,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:32,975 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 07:53:32,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1570194206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:32,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163996948] [2022-12-14 07:53:32,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:32,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:32,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:32,976 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:53:32,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:53:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:53:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:33,081 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:33,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:33,115 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 07:53:33,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:53:33,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163996948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:33,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:53:33,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 07:53:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793202293] [2022-12-14 07:53:33,235 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:53:33,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:53:33,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:33,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:53:33,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 07:53:33,235 INFO L87 Difference]: Start difference. First operand 125 states and 279 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 07:53:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:34,291 INFO L93 Difference]: Finished difference Result 370 states and 833 transitions. [2022-12-14 07:53:34,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:53:34,292 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 07:53:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:34,295 INFO L225 Difference]: With dead ends: 370 [2022-12-14 07:53:34,295 INFO L226 Difference]: Without dead ends: 370 [2022-12-14 07:53:34,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:53:34,296 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 174 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:34,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 8 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:53:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-14 07:53:34,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 128. [2022-12-14 07:53:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 2.96875) internal successors, (285), 127 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 07:53:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 285 transitions. [2022-12-14 07:53:34,301 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 285 transitions. Word has length 3 [2022-12-14 07:53:34,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:34,301 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 285 transitions. [2022-12-14 07:53:34,301 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 07:53:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 285 transitions. [2022-12-14 07:53:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:53:34,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:34,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:53:34,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 07:53:34,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (7)] Forceful destruction successful, exit code 0 [2022-12-14 07:53:34,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 07:53:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:34,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:34,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:34,907 INFO L85 PathProgramCache]: Analyzing trace with hash 777303435, now seen corresponding path program 1 times [2022-12-14 07:53:34,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:34,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1026255688] [2022-12-14 07:53:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:34,908 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:34,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:34,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:34,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:34,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:53:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:35,012 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 07:53:35,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-14 07:53:35,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:35,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:35,032 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1026255688] [2022-12-14 07:53:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1026255688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:35,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:35,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:53:35,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242701103] [2022-12-14 07:53:35,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:35,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:35,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:35,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:35,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:53:35,033 INFO L87 Difference]: Start difference. First operand 128 states and 285 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:35,155 INFO L93 Difference]: Finished difference Result 116 states and 261 transitions. [2022-12-14 07:53:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:35,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:53:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:35,156 INFO L225 Difference]: With dead ends: 116 [2022-12-14 07:53:35,157 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 07:53:35,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 07:53:35,157 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:35,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 07:53:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-12-14 07:53:35,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 2.8369565217391304) internal successors, (261), 115 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 07:53:35,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 261 transitions. [2022-12-14 07:53:35,163 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 261 transitions. Word has length 5 [2022-12-14 07:53:35,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:35,163 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 261 transitions. [2022-12-14 07:53:35,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 261 transitions. [2022-12-14 07:53:35,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:53:35,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:35,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:53:35,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:35,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:35,365 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:35,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:35,366 INFO L85 PathProgramCache]: Analyzing trace with hash 777303437, now seen corresponding path program 1 times [2022-12-14 07:53:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:35,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129141306] [2022-12-14 07:53:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:35,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:35,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:35,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:35,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:35,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 07:53:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:35,515 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:35,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:35,685 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 07:53:35,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:35,887 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 07:53:35,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:35,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129141306] [2022-12-14 07:53:35,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129141306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:35,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1724851899] [2022-12-14 07:53:35,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:35,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:35,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:35,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 07:53:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:36,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:53:36,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 07:53:36,055 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 07:53:36,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-12-14 07:53:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:36,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1724851899] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:36,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:53:36,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 07:53:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629886447] [2022-12-14 07:53:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:36,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:53:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:53:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:53:36,124 INFO L87 Difference]: Start difference. First operand 116 states and 261 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:36,235 INFO L93 Difference]: Finished difference Result 104 states and 237 transitions. [2022-12-14 07:53:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:53:36,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 07:53:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:36,236 INFO L225 Difference]: With dead ends: 104 [2022-12-14 07:53:36,236 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 07:53:36,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:53:36,237 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:36,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 07:53:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-12-14 07:53:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 88 states have (on average 2.6931818181818183) internal successors, (237), 103 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 07:53:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 237 transitions. [2022-12-14 07:53:36,241 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 237 transitions. Word has length 5 [2022-12-14 07:53:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:36,242 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 237 transitions. [2022-12-14 07:53:36,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 237 transitions. [2022-12-14 07:53:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:53:36,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:36,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:53:36,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 07:53:36,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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)] Ended with exit code 0 [2022-12-14 07:53:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:36,644 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:36,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1673404355, now seen corresponding path program 1 times [2022-12-14 07:53:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:36,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145858456] [2022-12-14 07:53:36,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:36,647 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:36,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:36,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:53:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:36,752 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 07:53:36,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 07:53:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:36,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:36,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:36,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145858456] [2022-12-14 07:53:36,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145858456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:36,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:36,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:36,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541092539] [2022-12-14 07:53:36,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:36,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:53:36,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:36,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:53:36,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:36,771 INFO L87 Difference]: Start difference. First operand 104 states and 237 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 07:53:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:36,887 INFO L93 Difference]: Finished difference Result 78 states and 174 transitions. [2022-12-14 07:53:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:53:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:53:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:36,888 INFO L225 Difference]: With dead ends: 78 [2022-12-14 07:53:36,888 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 07:53:36,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 07:53:36,889 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:36,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:53:36,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 07:53:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-14 07:53:36,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 2.5217391304347827) internal successors, (174), 77 states have internal predecessors, (174), 0 states have call successors, (0), 0 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 07:53:36,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 174 transitions. [2022-12-14 07:53:36,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 174 transitions. Word has length 6 [2022-12-14 07:53:36,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:36,891 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 174 transitions. [2022-12-14 07:53:36,892 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 07:53:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 174 transitions. [2022-12-14 07:53:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:53:36,892 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:36,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 07:53:36,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:37,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:37,094 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:37,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1673404354, now seen corresponding path program 1 times [2022-12-14 07:53:37,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:37,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706364943] [2022-12-14 07:53:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:37,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:53:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:37,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (14)] Waiting until timeout for monitored process [2022-12-14 07:53:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:37,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:53:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:37,338 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 07:53:37,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:37,477 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 35 treesize of output 31 [2022-12-14 07:53:37,554 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 07:53:37,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706364943] [2022-12-14 07:53:37,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706364943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [809486424] [2022-12-14 07:53:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:37,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:37,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:37,555 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:37,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 07:53:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:37,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:53:37,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:37,695 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:37,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:37,822 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 07:53:37,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:38,114 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 07:53:38,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [809486424] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:38,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132284919] [2022-12-14 07:53:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:38,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:38,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:38,115 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:53:38,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:53:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:38,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 07:53:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:38,223 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:38,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:38,336 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 07:53:38,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:38,415 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 07:53:38,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132284919] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:38,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:53:38,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 07:53:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563755711] [2022-12-14 07:53:38,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:53:38,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:53:38,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:53:38,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:53:38,416 INFO L87 Difference]: Start difference. First operand 78 states and 174 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:39,425 INFO L93 Difference]: Finished difference Result 226 states and 507 transitions. [2022-12-14 07:53:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:53:39,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:53:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:39,426 INFO L225 Difference]: With dead ends: 226 [2022-12-14 07:53:39,426 INFO L226 Difference]: Without dead ends: 226 [2022-12-14 07:53:39,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-14 07:53:39,427 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 237 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:39,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 15 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:53:39,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-12-14 07:53:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 115. [2022-12-14 07:53:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 2.80188679245283) internal successors, (297), 114 states have internal predecessors, (297), 0 states have call successors, (0), 0 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 07:53:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2022-12-14 07:53:39,431 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 6 [2022-12-14 07:53:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:39,431 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2022-12-14 07:53:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2022-12-14 07:53:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:53:39,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:39,431 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 07:53:39,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (14)] Ended with exit code 0 [2022-12-14 07:53:39,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 07:53:39,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 07:53:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:40,034 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1675510384, now seen corresponding path program 2 times [2022-12-14 07:53:40,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:40,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775927560] [2022-12-14 07:53:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:53:40,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:53:40,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:40,039 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:40,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (17)] Waiting until timeout for monitored process [2022-12-14 07:53:40,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:53:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 07:53:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:40,149 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:40,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:40,244 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 07:53:40,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:40,735 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 07:53:40,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775927560] [2022-12-14 07:53:40,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775927560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:40,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640201519] [2022-12-14 07:53:40,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:53:40,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:40,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:40,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:40,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 07:53:40,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:53:40,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:53:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:40,908 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:40,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:41,047 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 07:53:41,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:41,783 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 07:53:41,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640201519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:41,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304793582] [2022-12-14 07:53:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:53:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:41,784 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:53:41,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:53:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:53:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:41,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 07:53:41,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:41,903 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:41,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:41,939 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 07:53:41,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:42,065 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 07:53:42,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304793582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:42,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:53:42,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-12-14 07:53:42,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829765744] [2022-12-14 07:53:42,065 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:53:42,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 07:53:42,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 07:53:42,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:53:42,066 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:45,644 INFO L93 Difference]: Finished difference Result 784 states and 1938 transitions. [2022-12-14 07:53:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 07:53:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 07:53:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:45,648 INFO L225 Difference]: With dead ends: 784 [2022-12-14 07:53:45,648 INFO L226 Difference]: Without dead ends: 784 [2022-12-14 07:53:45,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:53:45,648 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 817 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:45,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 72 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 07:53:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-12-14 07:53:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 121. [2022-12-14 07:53:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 2.7589285714285716) internal successors, (309), 120 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 07:53:45,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 309 transitions. [2022-12-14 07:53:45,655 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 309 transitions. Word has length 6 [2022-12-14 07:53:45,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:45,655 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 309 transitions. [2022-12-14 07:53:45,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:45,656 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 309 transitions. [2022-12-14 07:53:45,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 07:53:45,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:45,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:45,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (17)] Ended with exit code 0 [2022-12-14 07:53:45,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 07:53:46,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 07:53:46,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:46,258 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:46,259 INFO L85 PathProgramCache]: Analyzing trace with hash -335926642, now seen corresponding path program 1 times [2022-12-14 07:53:46,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:46,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070071190] [2022-12-14 07:53:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:46,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:46,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:46,262 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:46,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:46,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:53:46,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:46,445 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:46,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:47,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070071190] [2022-12-14 07:53:47,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070071190] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:47,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236445303] [2022-12-14 07:53:47,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:47,114 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:47,115 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:47,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 07:53:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:47,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:53:47,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:47,298 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:47,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:47,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:47,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236445303] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:47,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884832240] [2022-12-14 07:53:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:47,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:47,645 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:53:47,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 07:53:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:53:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 07:53:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:47,768 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:47,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:47,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:47,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:53:48,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884832240] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:48,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:53:48,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-12-14 07:53:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70250849] [2022-12-14 07:53:48,093 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:53:48,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 07:53:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 07:53:48,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:53:48,094 INFO L87 Difference]: Start difference. First operand 121 states and 309 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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 07:53:50,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:50,806 INFO L93 Difference]: Finished difference Result 190 states and 452 transitions. [2022-12-14 07:53:50,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 07:53:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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 7 [2022-12-14 07:53:50,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:50,809 INFO L225 Difference]: With dead ends: 190 [2022-12-14 07:53:50,809 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 07:53:50,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:53:50,810 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 97 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:50,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 16 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 07:53:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 07:53:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 125. [2022-12-14 07:53:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 2.5948275862068964) internal successors, (301), 124 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 07:53:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 301 transitions. [2022-12-14 07:53:50,814 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 301 transitions. Word has length 7 [2022-12-14 07:53:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:50,814 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 301 transitions. [2022-12-14 07:53:50,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 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 07:53:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 301 transitions. [2022-12-14 07:53:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:53:50,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:50,814 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 07:53:50,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:51,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 07:53:51,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 07:53:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:51,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:51,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:51,418 INFO L85 PathProgramCache]: Analyzing trace with hash 465256750, now seen corresponding path program 2 times [2022-12-14 07:53:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:51,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395821804] [2022-12-14 07:53:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:53:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:53:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:51,423 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:51,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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)] Waiting until timeout for monitored process [2022-12-14 07:53:51,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 07:53:51,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:51,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 07:53:51,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:51,544 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:51,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 07:53:51,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:53:51,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395821804] [2022-12-14 07:53:51,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395821804] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:53:51,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:53:51,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:53:51,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901376555] [2022-12-14 07:53:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:53:51,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:53:51,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:53:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 07:53:51,629 INFO L87 Difference]: Start difference. First operand 125 states and 301 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:51,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:53:51,797 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2022-12-14 07:53:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:53:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 07:53:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:53:51,798 INFO L225 Difference]: With dead ends: 81 [2022-12-14 07:53:51,798 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 07:53:51,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:53:51,798 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:53:51,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:53:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 07:53:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 46. [2022-12-14 07:53:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 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 07:53:51,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-12-14 07:53:51,801 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 10 [2022-12-14 07:53:51,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:53:51,801 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-12-14 07:53:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:53:51,801 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-12-14 07:53:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 07:53:51,802 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:51,802 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 07:53:51,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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)] Ended with exit code 0 [2022-12-14 07:53:52,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:52,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:53:52,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:52,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2120827280, now seen corresponding path program 3 times [2022-12-14 07:53:52,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:53:52,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651965165] [2022-12-14 07:53:52,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:53:52,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:53:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:53:52,007 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:53:52,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (24)] Waiting until timeout for monitored process [2022-12-14 07:53:52,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:53:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:52,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:53:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:52,237 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:52,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:52,509 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 07:53:52,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:54,884 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 07:53:54,884 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:53:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651965165] [2022-12-14 07:53:54,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651965165] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:54,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729186421] [2022-12-14 07:53:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:53:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:53:54,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:53:54,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:53:54,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 07:53:55,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:53:55,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:55,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:53:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:55,500 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:55,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:55,959 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 07:53:55,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:56,274 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 07:53:56,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729186421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:56,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472479723] [2022-12-14 07:53:56,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:53:56,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:53:56,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:56,276 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:53:56,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 07:53:58,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 07:53:58,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:53:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 07:53:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:53:58,947 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 07:53:58,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 07:53:59,044 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 07:53:59,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:53:59,353 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 07:53:59,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472479723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:53:59,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:53:59,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 07:53:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898306053] [2022-12-14 07:53:59,353 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:53:59,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 07:53:59,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:53:59,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 07:53:59,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 07:53:59,355 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:54:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:14,836 INFO L93 Difference]: Finished difference Result 718 states and 1559 transitions. [2022-12-14 07:54:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:54:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 07:54:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:14,839 INFO L225 Difference]: With dead ends: 718 [2022-12-14 07:54:14,839 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 07:54:14,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 07:54:14,840 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1485 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:14,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 332 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 07:54:14,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 07:54:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 58. [2022-12-14 07:54:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.125) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 07:54:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2022-12-14 07:54:14,844 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 12 [2022-12-14 07:54:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:14,844 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2022-12-14 07:54:14,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:54:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2022-12-14 07:54:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 07:54:14,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:14,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:14,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (24)] Ended with exit code 0 [2022-12-14 07:54:15,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 07:54:15,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-12-14 07:54:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:15,448 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1153735885, now seen corresponding path program 1 times [2022-12-14 07:54:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465870667] [2022-12-14 07:54:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:15,451 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:15,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (27)] Waiting until timeout for monitored process [2022-12-14 07:54:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:54:15,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:15,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:15,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:15,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465870667] [2022-12-14 07:54:15,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465870667] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:15,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:54:15,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 07:54:15,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825200788] [2022-12-14 07:54:15,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:15,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:54:15,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:54:15,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:54:15,561 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 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 07:54:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:15,646 INFO L93 Difference]: Finished difference Result 85 states and 180 transitions. [2022-12-14 07:54:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:54:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 07:54:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:15,647 INFO L225 Difference]: With dead ends: 85 [2022-12-14 07:54:15,647 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 07:54:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:54:15,648 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:15,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:54:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 07:54:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 07:54:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 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 07:54:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-12-14 07:54:15,652 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-12-14 07:54:15,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:15,652 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-12-14 07:54:15,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 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 07:54:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-12-14 07:54:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:15,653 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:15,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:15,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (27)] Ended with exit code 0 [2022-12-14 07:54:15,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:15,853 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1408677255, now seen corresponding path program 1 times [2022-12-14 07:54:15,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:15,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545256923] [2022-12-14 07:54:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:15,855 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:15,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (28)] Waiting until timeout for monitored process [2022-12-14 07:54:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:15,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:54:15,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:15,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:15,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:15,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:15,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545256923] [2022-12-14 07:54:15,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545256923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:15,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:54:15,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:54:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180436559] [2022-12-14 07:54:15,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:15,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:54:15,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:54:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:54:15,985 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:16,140 INFO L93 Difference]: Finished difference Result 94 states and 192 transitions. [2022-12-14 07:54:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:54:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:16,141 INFO L225 Difference]: With dead ends: 94 [2022-12-14 07:54:16,141 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 07:54:16,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:54:16,142 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:16,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 8 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:54:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 07:54:16,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-12-14 07:54:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.2162162162162162) internal successors, (164), 75 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:54:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 164 transitions. [2022-12-14 07:54:16,145 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 164 transitions. Word has length 16 [2022-12-14 07:54:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 164 transitions. [2022-12-14 07:54:16,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 164 transitions. [2022-12-14 07:54:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:16,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:16,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:16,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (28)] Ended with exit code 0 [2022-12-14 07:54:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:16,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1051088255, now seen corresponding path program 1 times [2022-12-14 07:54:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:16,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [173464500] [2022-12-14 07:54:16,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:16,347 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:16,348 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:16,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (29)] Waiting until timeout for monitored process [2022-12-14 07:54:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:54:16,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:16,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:16,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:16,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [173464500] [2022-12-14 07:54:16,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [173464500] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:16,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:54:16,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 07:54:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4523240] [2022-12-14 07:54:16,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:16,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:54:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:54:16,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:54:16,454 INFO L87 Difference]: Start difference. First operand 76 states and 164 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:16,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:16,615 INFO L93 Difference]: Finished difference Result 90 states and 190 transitions. [2022-12-14 07:54:16,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:54:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:16,616 INFO L225 Difference]: With dead ends: 90 [2022-12-14 07:54:16,616 INFO L226 Difference]: Without dead ends: 86 [2022-12-14 07:54:16,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:54:16,616 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:16,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:54:16,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-14 07:54:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-12-14 07:54:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.2432432432432434) internal successors, (166), 75 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 07:54:16,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 166 transitions. [2022-12-14 07:54:16,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 166 transitions. Word has length 16 [2022-12-14 07:54:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 166 transitions. [2022-12-14 07:54:16,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 166 transitions. [2022-12-14 07:54:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:16,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:16,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:16,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (29)] Ended with exit code 0 [2022-12-14 07:54:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:16,820 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 124846441, now seen corresponding path program 2 times [2022-12-14 07:54:16,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:16,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789330320] [2022-12-14 07:54:16,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:54:16,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:16,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:16,825 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:16,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (30)] Waiting until timeout for monitored process [2022-12-14 07:54:16,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:54:16,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:16,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:54:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:17,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:17,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:17,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789330320] [2022-12-14 07:54:17,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789330320] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:17,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1827186566] [2022-12-14 07:54:17,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:54:17,171 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:17,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:54:17,172 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:54:17,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 07:54:17,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:54:17,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:54:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:17,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:17,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1827186566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:17,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:54:17,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 13 [2022-12-14 07:54:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307336642] [2022-12-14 07:54:17,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:17,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:54:17,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:54:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:54:17,434 INFO L87 Difference]: Start difference. First operand 76 states and 166 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:17,592 INFO L93 Difference]: Finished difference Result 88 states and 186 transitions. [2022-12-14 07:54:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:54:17,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:17,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:17,593 INFO L225 Difference]: With dead ends: 88 [2022-12-14 07:54:17,593 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 07:54:17,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:54:17,594 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:17,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:54:17,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 07:54:17,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-12-14 07:54:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.2564102564102564) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 07:54:17,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2022-12-14 07:54:17,596 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 16 [2022-12-14 07:54:17,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:17,597 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2022-12-14 07:54:17,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:17,597 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2022-12-14 07:54:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:17,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:17,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:17,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 07:54:17,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (30)] Ended with exit code 0 [2022-12-14 07:54:17,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:17,999 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:18,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:18,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1044547149, now seen corresponding path program 2 times [2022-12-14 07:54:18,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:18,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555697027] [2022-12-14 07:54:18,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:54:18,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:18,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:18,002 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:18,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (32)] Waiting until timeout for monitored process [2022-12-14 07:54:18,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:54:18,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:54:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:18,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:18,302 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555697027] [2022-12-14 07:54:18,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555697027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:18,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [731175214] [2022-12-14 07:54:18,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:54:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:54:18,303 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:54:18,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 07:54:18,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:54:18,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:54:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:18,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [731175214] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:18,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:54:18,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-12-14 07:54:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799179520] [2022-12-14 07:54:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:18,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:54:18,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:18,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:54:18,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:54:18,546 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:18,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:18,688 INFO L93 Difference]: Finished difference Result 96 states and 206 transitions. [2022-12-14 07:54:18,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:54:18,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:18,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:18,689 INFO L225 Difference]: With dead ends: 96 [2022-12-14 07:54:18,689 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 07:54:18,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:54:18,690 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:18,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:54:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 07:54:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-12-14 07:54:18,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.261904761904762) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 07:54:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 190 transitions. [2022-12-14 07:54:18,692 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 190 transitions. Word has length 16 [2022-12-14 07:54:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:18,692 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 190 transitions. [2022-12-14 07:54:18,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 190 transitions. [2022-12-14 07:54:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:18,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:18,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:18,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-12-14 07:54:18,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (32)] Ended with exit code 0 [2022-12-14 07:54:19,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:19,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash -83052929, now seen corresponding path program 3 times [2022-12-14 07:54:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:19,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005331667] [2022-12-14 07:54:19,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:54:19,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:19,098 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:19,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (34)] Waiting until timeout for monitored process [2022-12-14 07:54:19,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:54:19,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:19,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:54:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:19,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:19,395 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005331667] [2022-12-14 07:54:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005331667] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1599177749] [2022-12-14 07:54:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:54:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:54:19,396 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:54:19,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 07:54:19,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:54:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:19,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:54:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:19,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:54:19,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1599177749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:19,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:54:19,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 10 [2022-12-14 07:54:19,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461708387] [2022-12-14 07:54:19,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:54:19,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:54:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:54:19,679 INFO L87 Difference]: Start difference. First operand 86 states and 190 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:19,870 INFO L93 Difference]: Finished difference Result 94 states and 206 transitions. [2022-12-14 07:54:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:54:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:19,871 INFO L225 Difference]: With dead ends: 94 [2022-12-14 07:54:19,871 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 07:54:19,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 07:54:19,872 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:19,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:54:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 07:54:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2022-12-14 07:54:19,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 2.225) internal successors, (178), 81 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 07:54:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 178 transitions. [2022-12-14 07:54:19,875 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 178 transitions. Word has length 16 [2022-12-14 07:54:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:19,875 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 178 transitions. [2022-12-14 07:54:19,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 178 transitions. [2022-12-14 07:54:19,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 07:54:19,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:19,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:19,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (34)] Ended with exit code 0 [2022-12-14 07:54:20,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 07:54:20,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:20,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:20,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1609722447, now seen corresponding path program 3 times [2022-12-14 07:54:20,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:20,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559523656] [2022-12-14 07:54:20,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 07:54:20,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:20,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:20,282 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:20,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (36)] Waiting until timeout for monitored process [2022-12-14 07:54:20,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 07:54:20,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:20,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:54:20,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:20,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:20,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559523656] [2022-12-14 07:54:20,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559523656] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:54:20,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:54:20,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2022-12-14 07:54:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174074640] [2022-12-14 07:54:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:54:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:54:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:54:20,604 INFO L87 Difference]: Start difference. First operand 82 states and 178 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:20,765 INFO L93 Difference]: Finished difference Result 84 states and 182 transitions. [2022-12-14 07:54:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 07:54:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 07:54:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:20,766 INFO L225 Difference]: With dead ends: 84 [2022-12-14 07:54:20,766 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 07:54:20,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:54:20,767 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:20,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:54:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 07:54:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-12-14 07:54:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.189189189189189) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 0 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 07:54:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 162 transitions. [2022-12-14 07:54:20,769 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 162 transitions. Word has length 16 [2022-12-14 07:54:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:20,769 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 162 transitions. [2022-12-14 07:54:20,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 07:54:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 162 transitions. [2022-12-14 07:54:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 07:54:20,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:20,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:20,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (36)] Ended with exit code 0 [2022-12-14 07:54:20,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:20,971 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1254111345, now seen corresponding path program 1 times [2022-12-14 07:54:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [468805723] [2022-12-14 07:54:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:20,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.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 07:54:20,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:20,976 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:20,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (37)] Waiting until timeout for monitored process [2022-12-14 07:54:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:21,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:54:21,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 07:54:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [468805723] [2022-12-14 07:54:21,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [468805723] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:21,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [434741040] [2022-12-14 07:54:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:21,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 07:54:21,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 07:54:21,466 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 07:54:21,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 07:54:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:21,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:54:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [434741040] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:21,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523710601] [2022-12-14 07:54:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:21,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:54:21,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:54:21,743 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:54:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 07:54:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:21,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:54:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:21,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:54:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:54:21,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523710601] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:54:21,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 07:54:21,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-12-14 07:54:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694277075] [2022-12-14 07:54:21,953 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 07:54:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 07:54:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 07:54:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 07:54:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:54:21,954 INFO L87 Difference]: Start difference. First operand 76 states and 162 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:54:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:22,930 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2022-12-14 07:54:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 07:54:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 07:54:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:22,931 INFO L225 Difference]: With dead ends: 120 [2022-12-14 07:54:22,931 INFO L226 Difference]: Without dead ends: 120 [2022-12-14 07:54:22,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:54:22,932 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:22,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 12 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:54:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-14 07:54:22,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2022-12-14 07:54:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 2.234042553191489) internal successors, (210), 95 states have internal predecessors, (210), 0 states have call successors, (0), 0 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 07:54:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 210 transitions. [2022-12-14 07:54:22,934 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 210 transitions. Word has length 17 [2022-12-14 07:54:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:22,934 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 210 transitions. [2022-12-14 07:54:22,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:54:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 210 transitions. [2022-12-14 07:54:22,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 07:54:22,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:22,935 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:22,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-12-14 07:54:23,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 07:54:23,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (37)] Ended with exit code 0 [2022-12-14 07:54:23,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:23,537 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2022-12-14 07:54:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:23,538 INFO L85 PathProgramCache]: Analyzing trace with hash 498431857, now seen corresponding path program 2 times [2022-12-14 07:54:23,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 07:54:23,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299905137] [2022-12-14 07:54:23,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 07:54:23,540 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 07:54:23,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 07:54:23,542 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 07:54:23,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa118465-bf7b-4ea2-9d91-982cd9d01ff6/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 (40)] Waiting until timeout for monitored process [2022-12-14 07:54:23,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 07:54:23,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 07:54:23,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:54:23,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:54:24,782 INFO L321 Elim1Store]: treesize reduction 420, result has 20.6 percent of original size [2022-12-14 07:54:24,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 20 new quantified variables, introduced 66 case distinctions, treesize of input 1313 treesize of output 237 [2022-12-14 07:56:59,181 WARN L233 SmtUtils]: Spent 1.81m on a formula simplification. DAG size of input: 1478 DAG size of output: 29 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:56:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:56:59,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:57:15,978 WARN L233 SmtUtils]: Spent 14.34s on a formula simplification. DAG size of input: 1111 DAG size of output: 253 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 07:57:15,980 INFO L321 Elim1Store]: treesize reduction 2259, result has 19.6 percent of original size [2022-12-14 07:57:15,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 40 new quantified variables, introduced 276 case distinctions, treesize of input 1725 treesize of output 801 [2022-12-14 08:08:21,177 WARN L233 SmtUtils]: Spent 8.69s on a formula simplification that was a NOOP. DAG size: 12771 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)