./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW --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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- 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-4e7fbc6 [2022-11-23 16:11:47,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:11:47,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:11:47,055 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:11:47,055 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:11:47,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:11:47,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:11:47,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:11:47,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:11:47,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:11:47,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:11:47,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:11:47,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:11:47,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:11:47,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:11:47,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:11:47,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:11:47,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:11:47,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:11:47,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:11:47,079 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:11:47,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:11:47,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:11:47,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:11:47,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:11:47,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:11:47,089 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:11:47,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:11:47,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:11:47,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:11:47,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:11:47,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:11:47,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:11:47,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:11:47,097 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:11:47,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:11:47,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:11:47,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:11:47,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:11:47,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:11:47,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:11:47,106 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 16:11:47,145 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:11:47,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:11:47,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:11:47,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:11:47,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:11:47,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:11:47,150 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:11:47,150 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:11:47,150 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:11:47,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:11:47,152 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:11:47,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:11:47,153 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:11:47,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:11:47,153 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:11:47,153 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:11:47,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:11:47,154 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:11:47,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 16:11:47,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 16:11:47,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:11:47,156 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:11:47,156 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 16:11:47,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:11:47,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:11:47,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:11:47,157 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 16:11:47,158 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 16:11:47,158 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 16:11:47,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:11:47,159 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:11:47,159 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:11:47,159 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:11:47,160 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:11:47,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:11:47,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:47,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:11:47,161 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:11:47,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:11:47,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:11:47,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:11:47,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:11:47,163 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_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-11-23 16:11:47,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:11:47,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:11:47,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:11:47,483 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:11:47,483 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:11:47,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-11-23 16:11:51,011 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:11:51,302 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:11:51,303 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-11-23 16:11:51,321 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/f728a2d5e/b1bee0d32b0c4d87b350d4b9cba196a9/FLAGa569be06f [2022-11-23 16:11:51,339 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/f728a2d5e/b1bee0d32b0c4d87b350d4b9cba196a9 [2022-11-23 16:11:51,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:11:51,344 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:11:51,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:51,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:11:51,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:11:51,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:51" (1/1) ... [2022-11-23 16:11:51,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9e7a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:51, skipping insertion in model container [2022-11-23 16:11:51,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:51" (1/1) ... [2022-11-23 16:11:51,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:11:51,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:11:51,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:51,977 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 16:11:51,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@707a724f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:51, skipping insertion in model container [2022-11-23 16:11:51,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:51,979 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 16:11:51,982 INFO L158 Benchmark]: Toolchain (without parser) took 636.47ms. Allocated memory is still 188.7MB. Free memory was 144.0MB in the beginning and 130.1MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 16:11:51,982 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 16:11:51,984 INFO L158 Benchmark]: CACSL2BoogieTranslator took 633.64ms. Allocated memory is still 188.7MB. Free memory was 144.0MB in the beginning and 130.1MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 16:11:51,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 134.2MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 633.64ms. Allocated memory is still 188.7MB. Free memory was 144.0MB in the beginning and 130.1MB in the end (delta: 13.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW --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 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 --- 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-4e7fbc6 [2022-11-23 16:11:54,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:11:54,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:11:54,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:11:54,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:11:54,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:11:54,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:11:54,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:11:54,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:11:54,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:11:54,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:11:54,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:11:54,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:11:54,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:11:54,611 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:11:54,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:11:54,613 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:11:54,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:11:54,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:11:54,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:11:54,621 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:11:54,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:11:54,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:11:54,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:11:54,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:11:54,630 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:11:54,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:11:54,632 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:11:54,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:11:54,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:11:54,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:11:54,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:11:54,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:11:54,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:11:54,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:11:54,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:11:54,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:11:54,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:11:54,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:11:54,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:11:54,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:11:54,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 16:11:54,704 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:11:54,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:11:54,705 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:11:54,705 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:11:54,706 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:11:54,706 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:11:54,707 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:11:54,707 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:11:54,707 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:11:54,708 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:11:54,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:11:54,708 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:11:54,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 16:11:54,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 16:11:54,710 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:11:54,710 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:11:54,711 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 16:11:54,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:11:54,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:11:54,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:11:54,712 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 16:11:54,712 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 16:11:54,712 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 16:11:54,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:11:54,713 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:11:54,713 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 16:11:54,713 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 16:11:54,714 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:11:54,714 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:11:54,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:11:54,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 16:11:54,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:11:54,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:11:54,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:11:54,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:11:54,716 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 16:11:54,716 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 16:11:54,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:11:54,717 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 16:11:54,717 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_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a2fba2a92db51b6a97ddc82d5dc9e2df7a8770315ef841bfaf5f0764404946 [2022-11-23 16:11:55,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:11:55,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:11:55,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:11:55,195 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:11:55,196 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:11:55,198 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-11-23 16:11:58,779 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:11:59,106 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:11:59,107 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/sv-benchmarks/c/ldv-memsafety/memleaks_test17_3.i [2022-11-23 16:11:59,124 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/64273adb5/b653d034e68a496492bb3140844d698d/FLAG975a9c859 [2022-11-23 16:11:59,144 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/data/64273adb5/b653d034e68a496492bb3140844d698d [2022-11-23 16:11:59,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:11:59,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:11:59,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:11:59,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:11:59,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:11:59,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:59" (1/1) ... [2022-11-23 16:11:59,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f2df382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:11:59, skipping insertion in model container [2022-11-23 16:11:59,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:11:59" (1/1) ... [2022-11-23 16:11:59,170 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:11:59,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:11:59,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:59,758 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 16:11:59,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:11:59,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:11:59,890 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:12:00,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:12:00,062 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:12:00,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00 WrapperNode [2022-11-23 16:12:00,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:12:00,064 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:12:00,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:12:00,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:12:00,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,135 INFO L138 Inliner]: procedures = 166, calls = 76, calls flagged for inlining = 22, calls inlined = 4, statements flattened = 70 [2022-11-23 16:12:00,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:12:00,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:12:00,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:12:00,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:12:00,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,209 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:12:00,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:12:00,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:12:00,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:12:00,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (1/1) ... [2022-11-23 16:12:00,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:12:00,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:00,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:12:00,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:12:00,345 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 16:12:00,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 16:12:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:12:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:12:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:12:00,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:12:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:12:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 16:12:00,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:12:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:12:00,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:12:00,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:12:00,966 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:12:00,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:12:00,987 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 16:12:00,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:12:00 BoogieIcfgContainer [2022-11-23 16:12:00,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:12:00,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:12:00,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:12:00,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:12:00,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:11:59" (1/3) ... [2022-11-23 16:12:01,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e92194a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:12:01, skipping insertion in model container [2022-11-23 16:12:01,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:12:00" (2/3) ... [2022-11-23 16:12:01,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e92194a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:12:01, skipping insertion in model container [2022-11-23 16:12:01,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:12:00" (3/3) ... [2022-11-23 16:12:01,006 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_3.i [2022-11-23 16:12:01,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:12:01,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-23 16:12:01,107 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:12:01,116 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;@3aa1c1db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:12:01,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2022-11-23 16:12:01,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:12:01,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:01,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:01,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:01,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:01,144 INFO L85 PathProgramCache]: Analyzing trace with hash 714233942, now seen corresponding path program 1 times [2022-11-23 16:12:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:01,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [570294619] [2022-11-23 16:12:01,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:01,161 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:01,171 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:01,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 16:12:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:01,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:12:01,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:01,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:01,458 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [570294619] [2022-11-23 16:12:01,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [570294619] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:01,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:01,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:12:01,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075234388] [2022-11-23 16:12:01,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:01,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:12:01,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:12:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:01,540 INFO L87 Difference]: Start difference. First operand has 52 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:01,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:01,725 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2022-11-23 16:12:01,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:12:01,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 16:12:01,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:01,740 INFO L225 Difference]: With dead ends: 98 [2022-11-23 16:12:01,740 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 16:12:01,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:01,754 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 46 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:01,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 199 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:01,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 16:12:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2022-11-23 16:12:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 49 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:12:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-11-23 16:12:01,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 11 [2022-11-23 16:12:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:01,835 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-11-23 16:12:01,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:01,836 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-11-23 16:12:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:01,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:01,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:01,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:02,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:02,051 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:02,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash 714155687, now seen corresponding path program 1 times [2022-11-23 16:12:02,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:02,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704651683] [2022-11-23 16:12:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:02,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:02,078 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:02,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 16:12:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:02,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:12:02,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:02,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:12:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:02,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:02,308 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704651683] [2022-11-23 16:12:02,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704651683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:02,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:02,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:12:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903834626] [2022-11-23 16:12:02,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:02,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:12:02,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:02,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:12:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:02,317 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:02,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:02,557 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-11-23 16:12:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:12:02,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 16:12:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:02,560 INFO L225 Difference]: With dead ends: 67 [2022-11-23 16:12:02,561 INFO L226 Difference]: Without dead ends: 67 [2022-11-23 16:12:02,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:02,562 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:02,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:12:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-23 16:12:02,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-11-23 16:12:02,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5681818181818181) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:12:02,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-11-23 16:12:02,574 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 11 [2022-11-23 16:12:02,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:02,575 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-11-23 16:12:02,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-11-23 16:12:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:02,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:02,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:02,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:02,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:02,791 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 714155688, now seen corresponding path program 1 times [2022-11-23 16:12:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:02,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460845092] [2022-11-23 16:12:02,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:02,793 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:02,794 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:02,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 16:12:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:02,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:12:02,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:02,908 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:03,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:03,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:03,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460845092] [2022-11-23 16:12:03,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460845092] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:03,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:03,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 16:12:03,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090556366] [2022-11-23 16:12:03,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:03,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:12:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:12:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:12:03,064 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:03,463 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-11-23 16:12:03,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:12:03,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 16:12:03,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:03,465 INFO L225 Difference]: With dead ends: 82 [2022-11-23 16:12:03,465 INFO L226 Difference]: Without dead ends: 82 [2022-11-23 16:12:03,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 16:12:03,466 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 76 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:03,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 223 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:12:03,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-23 16:12:03,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 73. [2022-11-23 16:12:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 68 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:12:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-11-23 16:12:03,481 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 11 [2022-11-23 16:12:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-11-23 16:12:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-11-23 16:12:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:03,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:03,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:03,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 [2022-11-23 16:12:03,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:03,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1601737623, now seen corresponding path program 1 times [2022-11-23 16:12:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:03,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130513191] [2022-11-23 16:12:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:03,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:03,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:03,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 16:12:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:12:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:03,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:03,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:03,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130513191] [2022-11-23 16:12:03,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130513191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:03,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:03,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:12:03,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465517018] [2022-11-23 16:12:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:03,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:12:03,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:12:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:03,805 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:03,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:03,952 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-11-23 16:12:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:12:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 16:12:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:03,955 INFO L225 Difference]: With dead ends: 106 [2022-11-23 16:12:03,955 INFO L226 Difference]: Without dead ends: 104 [2022-11-23 16:12:03,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:12:03,956 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:03,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 165 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-23 16:12:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2022-11-23 16:12:03,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.5) internal successors, (81), 68 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:12:03,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-11-23 16:12:03,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 11 [2022-11-23 16:12:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:03,968 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-11-23 16:12:03,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:03,968 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-11-23 16:12:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 16:12:03,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:03,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:03,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:04,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:04,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:04,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1601659368, now seen corresponding path program 1 times [2022-11-23 16:12:04,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:04,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [810923542] [2022-11-23 16:12:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:04,191 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:04,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 16:12:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:04,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:12:04,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:04,322 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:04,322 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [810923542] [2022-11-23 16:12:04,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [810923542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:04,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:12:04,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:12:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118992586] [2022-11-23 16:12:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:12:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:12:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:04,325 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:04,373 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-11-23 16:12:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:12:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 16:12:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:04,375 INFO L225 Difference]: With dead ends: 61 [2022-11-23 16:12:04,375 INFO L226 Difference]: Without dead ends: 59 [2022-11-23 16:12:04,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:12:04,388 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:04,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 208 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:12:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-23 16:12:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-11-23 16:12:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-11-23 16:12:04,409 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2022-11-23 16:12:04,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:04,409 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-11-23 16:12:04,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:04,410 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-11-23 16:12:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 16:12:04,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:04,411 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:04,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:04,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:04,612 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:04,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:04,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1855917097, now seen corresponding path program 1 times [2022-11-23 16:12:04,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:04,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59626987] [2022-11-23 16:12:04,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:04,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:04,615 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:04,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 16:12:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:04,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:12:04,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:04,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:05,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:06,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59626987] [2022-11-23 16:12:06,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59626987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:06,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044235696] [2022-11-23 16:12:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:06,053 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:06,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:06,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:06,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-23 16:12:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:12:06,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:06,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:06,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:06,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044235696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:06,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523326986] [2022-11-23 16:12:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:06,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:06,802 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:06,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 16:12:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:12:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:06,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:07,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:07,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523326986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:07,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:12:07,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-11-23 16:12:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113161943] [2022-11-23 16:12:07,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:07,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 16:12:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 16:12:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-23 16:12:07,447 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:12:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:09,239 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2022-11-23 16:12:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 16:12:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-23 16:12:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:09,242 INFO L225 Difference]: With dead ends: 99 [2022-11-23 16:12:09,242 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 16:12:09,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-11-23 16:12:09,249 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 241 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:09,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 268 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 16:12:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 16:12:09,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 68. [2022-11-23 16:12:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.44) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-11-23 16:12:09,264 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 14 [2022-11-23 16:12:09,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:09,264 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-11-23 16:12:09,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:12:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-11-23 16:12:09,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 16:12:09,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:09,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:09,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:09,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:09,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:09,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:09,872 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:09,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:09,872 INFO L85 PathProgramCache]: Analyzing trace with hash 854181427, now seen corresponding path program 1 times [2022-11-23 16:12:09,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:09,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1111496586] [2022-11-23 16:12:09,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:09,873 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:09,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:09,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:09,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 16:12:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:09,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:12:09,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:10,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:10,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:10,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1111496586] [2022-11-23 16:12:10,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1111496586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [937813496] [2022-11-23 16:12:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:10,210 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:10,215 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:10,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-23 16:12:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:12:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-23 16:12:10,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:10,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [937813496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:10,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:12:10,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 13 [2022-11-23 16:12:10,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650177993] [2022-11-23 16:12:10,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:10,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:12:10,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:12:10,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:12:10,463 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:10,574 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-11-23 16:12:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:12:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-23 16:12:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:10,575 INFO L225 Difference]: With dead ends: 67 [2022-11-23 16:12:10,575 INFO L226 Difference]: Without dead ends: 67 [2022-11-23 16:12:10,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:12:10,576 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:10,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 120 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:10,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-23 16:12:10,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-23 16:12:10,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.4) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2022-11-23 16:12:10,582 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 22 [2022-11-23 16:12:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:10,582 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2022-11-23 16:12:10,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2022-11-23 16:12:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 16:12:10,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:10,584 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:10,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:10,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-11-23 16:12:10,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:10,995 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1071704552, now seen corresponding path program 2 times [2022-11-23 16:12:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:10,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406219680] [2022-11-23 16:12:10,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:12:10,997 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:10,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:10,998 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:11,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 16:12:11,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:12:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:11,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:12:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:11,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:11,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:13,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:13,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406219680] [2022-11-23 16:12:13,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406219680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:13,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1097901955] [2022-11-23 16:12:13,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:12:13,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:13,868 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-23 16:12:14,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:12:14,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:14,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 16:12:14,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:14,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:14,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:20,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1097901955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:20,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110720969] [2022-11-23 16:12:20,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:12:20,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:20,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:20,739 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:20,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 16:12:20,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:12:20,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:12:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:20,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:21,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:24,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:24,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110720969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:24,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:12:24,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 12] total 47 [2022-11-23 16:12:24,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427471302] [2022-11-23 16:12:24,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:24,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 16:12:24,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:24,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 16:12:24,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1903, Unknown=2, NotChecked=0, Total=2256 [2022-11-23 16:12:24,855 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 48 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 16:12:33,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:33,900 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2022-11-23 16:12:33,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 16:12:33,901 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 23 [2022-11-23 16:12:33,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:33,902 INFO L225 Difference]: With dead ends: 146 [2022-11-23 16:12:33,902 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 16:12:33,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=675, Invalid=3105, Unknown=2, NotChecked=0, Total=3782 [2022-11-23 16:12:33,906 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1150 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:33,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 754 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 16:12:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 16:12:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2022-11-23 16:12:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.338235294117647) internal successors, (91), 81 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-11-23 16:12:33,927 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 23 [2022-11-23 16:12:33,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:33,927 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-11-23 16:12:33,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 16:12:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-11-23 16:12:33,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 16:12:33,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:33,929 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:33,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:34,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-23 16:12:34,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:34,531 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:34,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1503150025, now seen corresponding path program 1 times [2022-11-23 16:12:34,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:34,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975704565] [2022-11-23 16:12:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:34,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:34,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:34,533 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:34,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 16:12:34,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:34,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:12:34,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:34,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:35,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975704565] [2022-11-23 16:12:35,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975704565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:35,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1808207166] [2022-11-23 16:12:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:35,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:35,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:35,243 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:35,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 16:12:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:12:35,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:35,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1808207166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:35,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084940389] [2022-11-23 16:12:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:35,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:35,686 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:35,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 16:12:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:12:35,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-23 16:12:35,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:12:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084940389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:12:35,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-23 16:12:35,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9, 9, 9, 9] total 17 [2022-11-23 16:12:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964417052] [2022-11-23 16:12:35,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:12:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:12:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:12:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:12:35,886 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:35,975 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2022-11-23 16:12:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:12:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-23 16:12:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:35,978 INFO L225 Difference]: With dead ends: 112 [2022-11-23 16:12:35,978 INFO L226 Difference]: Without dead ends: 112 [2022-11-23 16:12:35,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:12:35,979 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 102 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:35,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 95 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:12:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-23 16:12:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2022-11-23 16:12:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2022-11-23 16:12:35,986 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 34 [2022-11-23 16:12:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:35,986 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2022-11-23 16:12:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:12:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2022-11-23 16:12:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 16:12:35,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:35,988 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:35,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-23 16:12:36,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:36,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:36,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:36,592 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1941289385, now seen corresponding path program 1 times [2022-11-23 16:12:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:36,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005026858] [2022-11-23 16:12:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:36,594 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:36,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 16:12:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:12:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:36,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:12:37,256 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005026858] [2022-11-23 16:12:37,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005026858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:37,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1989614738] [2022-11-23 16:12:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:37,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:37,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:37,257 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:37,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 16:12:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:37,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:12:37,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:37,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:37,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:12:37,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1989614738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932341888] [2022-11-23 16:12:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:12:37,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:12:37,671 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:12:37,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 16:12:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:12:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 16:12:37,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:37,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:38,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 16:12:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:38,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 16:12:40,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932341888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:40,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:12:40,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 14, 13] total 34 [2022-11-23 16:12:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627700702] [2022-11-23 16:12:40,351 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:12:40,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 16:12:40,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:12:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 16:12:40,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 16:12:40,353 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:12:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:12:44,235 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2022-11-23 16:12:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 16:12:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-11-23 16:12:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:12:44,239 INFO L225 Difference]: With dead ends: 123 [2022-11-23 16:12:44,240 INFO L226 Difference]: Without dead ends: 123 [2022-11-23 16:12:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 16:12:44,245 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 494 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:12:44,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 487 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 16:12:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-23 16:12:44,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2022-11-23 16:12:44,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:12:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-11-23 16:12:44,265 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 35 [2022-11-23 16:12:44,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:12:44,265 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-11-23 16:12:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:12:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-11-23 16:12:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 16:12:44,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:12:44,272 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:12:44,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:44,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:44,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 16:12:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:12:44,877 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:12:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:12:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1255484104, now seen corresponding path program 3 times [2022-11-23 16:12:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:12:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229532981] [2022-11-23 16:12:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:12:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:12:44,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:12:44,879 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:12:44,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 16:12:45,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 16:12:45,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:12:45,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:46,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:12:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:50,608 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:12:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229532981] [2022-11-23 16:12:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229532981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:12:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1489873783] [2022-11-23 16:12:50,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:12:50,608 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:12:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:12:50,611 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:12:50,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-23 16:12:51,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 16:12:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:12:51,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 16:12:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:12:51,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:12:51,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-23 16:12:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:12:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:06,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1489873783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:06,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539760737] [2022-11-23 16:13:06,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:13:06,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:06,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:06,879 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:06,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 16:13:09,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 16:13:09,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:09,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:13:09,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:09,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:13:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:09,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:13:35,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539760737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:35,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:13:35,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19, 24, 18, 23] total 78 [2022-11-23 16:13:35,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107696863] [2022-11-23 16:13:35,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:35,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-23 16:13:35,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:13:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-23 16:13:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=838, Invalid=5168, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 16:13:35,077 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 78 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 16:13:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:45,127 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-11-23 16:13:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 16:13:45,128 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-23 16:13:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:45,129 INFO L225 Difference]: With dead ends: 81 [2022-11-23 16:13:45,129 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 16:13:45,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2221 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=885, Invalid=5921, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 16:13:45,132 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 1276 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1279 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:45,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1279 Valid, 439 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 16:13:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 16:13:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2022-11-23 16:13:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 74 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:13:45,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-23 16:13:45,142 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 41 [2022-11-23 16:13:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:45,142 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-23 16:13:45,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 16:13:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-23 16:13:45,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 16:13:45,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:45,144 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:45,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:45,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:45,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:45,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:13:45,747 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:13:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613480, now seen corresponding path program 2 times [2022-11-23 16:13:45,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:13:45,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418859773] [2022-11-23 16:13:45,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:13:45,749 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:13:45,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:13:45,750 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:13:45,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-23 16:13:45,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:13:45,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:13:45,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:45,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:13:46,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:46,479 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_612 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_612) |c_#length|)))) is different from true [2022-11-23 16:13:46,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:46,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:13:46,529 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:13:46,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:13:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:46,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:49,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:13:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418859773] [2022-11-23 16:13:49,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418859773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:49,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1667420502] [2022-11-23 16:13:49,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:13:49,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:13:49,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:13:49,511 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:13:49,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-23 16:13:49,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:13:49,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:13:49,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:49,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:13:49,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:50,394 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_682 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_682) |c_#length|)))) is different from true [2022-11-23 16:13:50,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:50,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:13:50,434 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:13:50,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:13:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:50,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1667420502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856226824] [2022-11-23 16:13:50,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:13:50,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:50,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:50,724 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 16:13:50,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:13:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:13:50,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 16:13:50,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:50,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:50,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:13:51,354 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_752 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_752) |c_#length|)))) is different from true [2022-11-23 16:13:51,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:13:51,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:13:51,402 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:13:51,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:13:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:51,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856226824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:13:53,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:13:53,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-11-23 16:13:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756472303] [2022-11-23 16:13:53,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:53,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 16:13:53,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:13:53,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 16:13:53,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=110, Unknown=3, NotChecked=66, Total=210 [2022-11-23 16:13:53,698 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:13:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:54,778 INFO L93 Difference]: Finished difference Result 163 states and 178 transitions. [2022-11-23 16:13:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 16:13:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-11-23 16:13:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:54,780 INFO L225 Difference]: With dead ends: 163 [2022-11-23 16:13:54,780 INFO L226 Difference]: Without dead ends: 163 [2022-11-23 16:13:54,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=71, Invalid=280, Unknown=3, NotChecked=108, Total=462 [2022-11-23 16:13:54,781 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 165 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:54,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 323 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 375 Invalid, 0 Unknown, 358 Unchecked, 0.8s Time] [2022-11-23 16:13:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-23 16:13:54,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2022-11-23 16:13:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 104 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:13:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 138 transitions. [2022-11-23 16:13:54,796 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 138 transitions. Word has length 50 [2022-11-23 16:13:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:54,796 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 138 transitions. [2022-11-23 16:13:54,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.090909090909091) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 16:13:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 138 transitions. [2022-11-23 16:13:54,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 16:13:54,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:54,801 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:54,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:55,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-23 16:13:55,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:13:55,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:13:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:13:55,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1908613481, now seen corresponding path program 1 times [2022-11-23 16:13:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:13:55,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802681641] [2022-11-23 16:13:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:55,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:13:55,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:13:55,420 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:13:55,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 16:13:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:55,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 16:13:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:55,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:55,774 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-23 16:13:55,800 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 16:13:55,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:13:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:55,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:13:56,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:13:56,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802681641] [2022-11-23 16:13:56,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802681641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:56,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1258173259] [2022-11-23 16:13:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:56,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:13:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:13:56,071 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:13:56,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 16:13:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:13:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:56,594 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_889 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_889))))) is different from true [2022-11-23 16:13:56,635 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:13:56,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:13:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:56,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:13:56,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1258173259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:56,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690415297] [2022-11-23 16:13:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:13:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:13:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:13:56,906 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:13:56,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 16:13:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:13:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 16:13:57,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:13:57,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:13:57,198 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_959 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_959) |c_#valid|)))) is different from true [2022-11-23 16:13:57,230 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:13:57,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:13:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 2 not checked. [2022-11-23 16:13:57,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:13:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:13:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690415297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:13:57,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:13:57,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-11-23 16:13:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964381542] [2022-11-23 16:13:57,492 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:13:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 16:13:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:13:57,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 16:13:57,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=45, Unknown=3, NotChecked=42, Total=110 [2022-11-23 16:13:57,494 INFO L87 Difference]: Start difference. First operand 111 states and 138 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:13:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:13:59,812 INFO L93 Difference]: Finished difference Result 128 states and 157 transitions. [2022-11-23 16:13:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:13:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-11-23 16:13:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:13:59,814 INFO L225 Difference]: With dead ends: 128 [2022-11-23 16:13:59,815 INFO L226 Difference]: Without dead ends: 128 [2022-11-23 16:13:59,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 276 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=28, Invalid=71, Unknown=3, NotChecked=54, Total=156 [2022-11-23 16:13:59,816 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:13:59,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 144 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2022-11-23 16:13:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-23 16:13:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2022-11-23 16:13:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 94 states have internal predecessors, (106), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:13:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2022-11-23 16:13:59,822 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 50 [2022-11-23 16:13:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:13:59,822 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2022-11-23 16:13:59,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 16:13:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2022-11-23 16:13:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 16:13:59,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:13:59,824 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:13:59,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:00,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:00,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:00,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:00,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:00,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -226568731, now seen corresponding path program 1 times [2022-11-23 16:14:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:00,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785659033] [2022-11-23 16:14:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:00,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:00,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:00,433 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:00,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-23 16:14:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:14:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:00,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:14:00,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:00,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785659033] [2022-11-23 16:14:00,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785659033] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:14:00,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:14:00,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:14:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134460100] [2022-11-23 16:14:00,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:14:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:14:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:14:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:14:00,680 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:14:00,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:00,746 INFO L93 Difference]: Finished difference Result 119 states and 136 transitions. [2022-11-23 16:14:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 16:14:00,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2022-11-23 16:14:00,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:00,748 INFO L225 Difference]: With dead ends: 119 [2022-11-23 16:14:00,748 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 16:14:00,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 16:14:00,749 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:00,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 190 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:14:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 16:14:00,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2022-11-23 16:14:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.2298850574712643) internal successors, (107), 95 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:14:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-23 16:14:00,754 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 52 [2022-11-23 16:14:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:00,754 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-23 16:14:00,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:14:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-23 16:14:00,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 16:14:00,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:00,767 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:00,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:00,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:00,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:00,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1516241604, now seen corresponding path program 1 times [2022-11-23 16:14:00,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279279906] [2022-11-23 16:14:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:00,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:00,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:00,982 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:01,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-23 16:14:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 16:14:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:01,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:14:01,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279279906] [2022-11-23 16:14:01,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279279906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:14:01,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:14:01,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 16:14:01,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421249167] [2022-11-23 16:14:01,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:14:01,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:14:01,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:01,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:14:01,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:14:01,231 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:14:01,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:01,317 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2022-11-23 16:14:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 16:14:01,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-11-23 16:14:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:01,319 INFO L225 Difference]: With dead ends: 115 [2022-11-23 16:14:01,319 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 16:14:01,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:14:01,320 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 19 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:01,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 134 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:14:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 16:14:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2022-11-23 16:14:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 97 states have internal predecessors, (109), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 16:14:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-23 16:14:01,325 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 52 [2022-11-23 16:14:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:01,326 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-23 16:14:01,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:14:01,326 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-23 16:14:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 16:14:01,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:01,327 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:01,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:01,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:01,535 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:01,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:01,535 INFO L85 PathProgramCache]: Analyzing trace with hash -840525585, now seen corresponding path program 1 times [2022-11-23 16:14:01,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:01,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1962686119] [2022-11-23 16:14:01,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:01,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:01,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:01,537 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:01,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-23 16:14:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:01,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:14:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:01,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:02,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1962686119] [2022-11-23 16:14:02,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1962686119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:02,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113881242] [2022-11-23 16:14:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:02,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:02,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:02,031 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:02,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-23 16:14:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:14:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-23 16:14:02,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-23 16:14:02,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113881242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:02,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086714806] [2022-11-23 16:14:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:02,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:02,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:02,588 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:02,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 16:14:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:14:02,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-23 16:14:02,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-11-23 16:14:02,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086714806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:02,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:14:02,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 11 [2022-11-23 16:14:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843400292] [2022-11-23 16:14:02,989 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 16:14:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 16:14:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:14:02,991 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:14:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:03,371 INFO L93 Difference]: Finished difference Result 223 states and 253 transitions. [2022-11-23 16:14:03,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:14:03,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 55 [2022-11-23 16:14:03,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:03,379 INFO L225 Difference]: With dead ends: 223 [2022-11-23 16:14:03,379 INFO L226 Difference]: Without dead ends: 223 [2022-11-23 16:14:03,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-23 16:14:03,380 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 316 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:03,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 289 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:14:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-23 16:14:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 109. [2022-11-23 16:14:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 93 states have (on average 1.1935483870967742) internal successors, (111), 98 states have internal predecessors, (111), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 16:14:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-23 16:14:03,388 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 55 [2022-11-23 16:14:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:03,388 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-23 16:14:03,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:14:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-23 16:14:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 16:14:03,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:03,390 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:03,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:03,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:03,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:03,995 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1024677531, now seen corresponding path program 1 times [2022-11-23 16:14:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:03,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541223429] [2022-11-23 16:14:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:03,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:03,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:03,997 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:03,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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)] Waiting until timeout for monitored process [2022-11-23 16:14:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:14:04,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:04,610 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-11-23 16:14:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:04,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:04,871 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret42#1.base_87| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_87|))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_87| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-23 16:14:04,873 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541223429] [2022-11-23 16:14:04,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541223429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:04,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309422865] [2022-11-23 16:14:04,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:04,874 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:04,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:04,875 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:04,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-23 16:14:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:14:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:05,926 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-11-23 16:14:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:05,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:06,144 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret42#1.base_90| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_90|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_90| (_ bv0 1))))) is different from false [2022-11-23 16:14:06,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1309422865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:06,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142925831] [2022-11-23 16:14:06,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:06,148 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 16:14:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:06,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:14:06,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:06,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:14:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:06,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:06,832 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret42#1.base_93| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_93|) (_ bv0 1))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret42#1.base_93| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-23 16:14:06,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142925831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:06,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:14:06,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-11-23 16:14:06,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113168919] [2022-11-23 16:14:06,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:06,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 16:14:06,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:06,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 16:14:06,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=150, Unknown=5, NotChecked=140, Total=342 [2022-11-23 16:14:06,837 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 16 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 16:14:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:07,420 INFO L93 Difference]: Finished difference Result 149 states and 177 transitions. [2022-11-23 16:14:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:14:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-11-23 16:14:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:07,422 INFO L225 Difference]: With dead ends: 149 [2022-11-23 16:14:07,422 INFO L226 Difference]: Without dead ends: 139 [2022-11-23 16:14:07,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 305 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=311, Unknown=5, NotChecked=200, Total=600 [2022-11-23 16:14:07,423 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 89 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:07,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 268 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 184 Invalid, 1 Unknown, 156 Unchecked, 0.4s Time] [2022-11-23 16:14:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-23 16:14:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2022-11-23 16:14:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 112 states have internal predecessors, (127), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 16:14:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2022-11-23 16:14:07,430 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 58 [2022-11-23 16:14:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:07,430 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2022-11-23 16:14:07,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 16:14:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2022-11-23 16:14:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 16:14:07,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:07,431 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:07,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:07,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:07,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 16:14:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:08,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:08,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1043028556, now seen corresponding path program 1 times [2022-11-23 16:14:08,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:08,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845025113] [2022-11-23 16:14:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:08,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:08,035 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:08,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-23 16:14:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:08,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 16:14:08,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:08,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:14:08,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:14:08,798 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1578 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1578))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:14:08,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:08,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:08,841 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:08,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:08,979 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1579 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1579))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:14:09,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:09,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:09,022 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:09,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 147 trivial. 6 not checked. [2022-11-23 16:14:09,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:13,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:13,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845025113] [2022-11-23 16:14:13,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845025113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:13,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254728572] [2022-11-23 16:14:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:13,542 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:13,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:13,547 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:13,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-23 16:14:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 16:14:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:14,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:14:14,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:14:14,577 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1657 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1657) |c_#length|)))) is different from true [2022-11-23 16:14:14,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:14,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:14,621 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:14,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:14,702 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1658 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1658))))) is different from true [2022-11-23 16:14:14,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:14,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:14,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:14,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 147 trivial. 6 not checked. [2022-11-23 16:14:14,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:17,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254728572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939408568] [2022-11-23 16:14:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:17,049 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:17,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 16:14:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:14:17,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:17,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:14:17,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:14:17,750 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1736 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1736) |c_#length|)))) is different from true [2022-11-23 16:14:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:17,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:17,804 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:17,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:17,885 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1737 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1737) |c_#length|)))) is different from true [2022-11-23 16:14:17,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:14:17,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:14:17,925 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:14:17,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:14:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 147 trivial. 6 not checked. [2022-11-23 16:14:17,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:20,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939408568] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:14:20,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:14:20,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2022-11-23 16:14:20,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445789212] [2022-11-23 16:14:20,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:20,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 16:14:20,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:20,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 16:14:20,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=154, Unknown=7, NotChecked=174, Total=380 [2022-11-23 16:14:20,226 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:14:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:21,577 INFO L93 Difference]: Finished difference Result 174 states and 197 transitions. [2022-11-23 16:14:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 16:14:21,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 60 [2022-11-23 16:14:21,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:21,579 INFO L225 Difference]: With dead ends: 174 [2022-11-23 16:14:21,579 INFO L226 Difference]: Without dead ends: 174 [2022-11-23 16:14:21,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=109, Invalid=460, Unknown=7, NotChecked=294, Total=870 [2022-11-23 16:14:21,581 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 199 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:21,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 238 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 347 Invalid, 0 Unknown, 558 Unchecked, 0.8s Time] [2022-11-23 16:14:21,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-23 16:14:21,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 125. [2022-11-23 16:14:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 106 states have (on average 1.179245283018868) internal successors, (125), 112 states have internal predecessors, (125), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 16:14:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-23 16:14:21,588 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 60 [2022-11-23 16:14:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:21,588 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-23 16:14:21,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 16:14:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-23 16:14:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 16:14:21,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:21,590 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:21,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:21,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-23 16:14:22,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-23 16:14:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:22,197 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash -929144456, now seen corresponding path program 1 times [2022-11-23 16:14:22,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1225227127] [2022-11-23 16:14:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:22,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:22,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:22,199 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:22,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-23 16:14:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:14:22,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:22,857 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:22,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:23,525 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 11 treesize of output 9 [2022-11-23 16:14:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:24,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1225227127] [2022-11-23 16:14:24,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1225227127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:24,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [444548187] [2022-11-23 16:14:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:24,070 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:24,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:24,071 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:24,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-23 16:14:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:14:24,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:24,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:29,207 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 11 treesize of output 9 [2022-11-23 16:14:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [444548187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881037438] [2022-11-23 16:14:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:29,417 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:29,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 16:14:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:14:29,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:29,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:38,373 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 11 treesize of output 9 [2022-11-23 16:14:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:38,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881037438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:38,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:14:38,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 19 [2022-11-23 16:14:38,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280783572] [2022-11-23 16:14:38,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:38,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 16:14:38,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 16:14:38,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=323, Unknown=6, NotChecked=0, Total=380 [2022-11-23 16:14:38,586 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:14:42,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:42,303 INFO L93 Difference]: Finished difference Result 221 states and 249 transitions. [2022-11-23 16:14:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-23 16:14:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 62 [2022-11-23 16:14:42,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:42,306 INFO L225 Difference]: With dead ends: 221 [2022-11-23 16:14:42,306 INFO L226 Difference]: Without dead ends: 221 [2022-11-23 16:14:42,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 347 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=185, Invalid=931, Unknown=6, NotChecked=0, Total=1122 [2022-11-23 16:14:42,307 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:42,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 550 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 16:14:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-23 16:14:42,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 125. [2022-11-23 16:14:42,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 112 states have internal predecessors, (125), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 16:14:42,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-23 16:14:42,315 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 62 [2022-11-23 16:14:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:42,315 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-23 16:14:42,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:14:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-23 16:14:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 16:14:42,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:42,317 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:42,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:42,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-23 16:14:42,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2022-11-23 16:14:42,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:42,927 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:42,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:42,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1261292942, now seen corresponding path program 1 times [2022-11-23 16:14:42,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:42,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818444678] [2022-11-23 16:14:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:42,930 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:42,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-23 16:14:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:43,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:14:43,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:43,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:43,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:14:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:43,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:44,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:44,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818444678] [2022-11-23 16:14:44,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818444678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:44,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1568951368] [2022-11-23 16:14:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:44,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:44,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:44,111 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:44,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-23 16:14:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:44,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:14:44,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:44,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:44,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:14:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:44,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1568951368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:45,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963148111] [2022-11-23 16:14:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:45,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:45,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:45,063 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:45,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-23 16:14:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 16:14:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:45,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:45,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:14:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-23 16:14:45,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:45,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963148111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:45,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:14:45,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 12, 8, 12, 8] total 17 [2022-11-23 16:14:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553080634] [2022-11-23 16:14:45,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 16:14:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 16:14:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-23 16:14:45,790 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:14:47,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:14:47,635 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2022-11-23 16:14:47,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 16:14:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2022-11-23 16:14:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:14:47,638 INFO L225 Difference]: With dead ends: 171 [2022-11-23 16:14:47,638 INFO L226 Difference]: Without dead ends: 171 [2022-11-23 16:14:47,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 351 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 16:14:47,639 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 419 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:14:47,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 290 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:14:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-23 16:14:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 126. [2022-11-23 16:14:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 108 states have (on average 1.1666666666666667) internal successors, (126), 113 states have internal predecessors, (126), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 11 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 16:14:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 149 transitions. [2022-11-23 16:14:47,646 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 149 transitions. Word has length 63 [2022-11-23 16:14:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:14:47,647 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 149 transitions. [2022-11-23 16:14:47,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:14:47,647 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 149 transitions. [2022-11-23 16:14:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 16:14:47,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:14:47,648 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:14:47,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-23 16:14:47,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-23 16:14:48,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-23 16:14:48,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:48,265 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:14:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:14:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash 445375639, now seen corresponding path program 1 times [2022-11-23 16:14:48,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:14:48,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404994056] [2022-11-23 16:14:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:48,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:14:48,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:14:48,267 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:14:48,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-23 16:14:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:48,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 16:14:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:49,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:50,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:14:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:14:50,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:50,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:14:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404994056] [2022-11-23 16:14:50,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404994056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771556586] [2022-11-23 16:14:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:50,774 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:14:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:14:50,775 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:14:50,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-23 16:14:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:14:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:51,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:52,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:14:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:52,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:52,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771556586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:52,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235715933] [2022-11-23 16:14:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:14:52,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:14:52,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:14:52,431 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:14:52,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-23 16:14:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:14:52,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 16:14:52,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:14:53,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:14:54,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-11-23 16:14:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:14:54,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:14:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:14:54,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235715933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:14:54,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:14:54,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 13, 8, 13, 8] total 40 [2022-11-23 16:14:54,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361305920] [2022-11-23 16:14:54,264 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:14:54,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 16:14:54,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:14:54,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 16:14:54,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 16:14:54,266 INFO L87 Difference]: Start difference. First operand 126 states and 149 transitions. Second operand has 41 states, 40 states have (on average 2.475) internal successors, (99), 35 states have internal predecessors, (99), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 16:14:56,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:14:58,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:01,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:03,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:13,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:13,441 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-11-23 16:15:13,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 16:15:13,443 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 35 states have internal predecessors, (99), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 64 [2022-11-23 16:15:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:13,445 INFO L225 Difference]: With dead ends: 223 [2022-11-23 16:15:13,445 INFO L226 Difference]: Without dead ends: 221 [2022-11-23 16:15:13,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 340 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=887, Invalid=5755, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 16:15:13,448 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 494 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 79 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:13,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 650 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1208 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2022-11-23 16:15:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-11-23 16:15:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 147. [2022-11-23 16:15:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 130 states have internal predecessors, (144), 9 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (17), 12 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-23 16:15:13,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2022-11-23 16:15:13,456 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 64 [2022-11-23 16:15:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:13,457 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2022-11-23 16:15:13,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.475) internal successors, (99), 35 states have internal predecessors, (99), 8 states have call successors, (9), 6 states have call predecessors, (9), 9 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-23 16:15:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2022-11-23 16:15:13,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 16:15:13,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:13,458 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:13,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:13,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-11-23 16:15:13,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:14,065 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:15:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:14,066 INFO L85 PathProgramCache]: Analyzing trace with hash 921743024, now seen corresponding path program 1 times [2022-11-23 16:15:14,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:15:14,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041584972] [2022-11-23 16:15:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:14,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:14,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:15:14,069 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:15:14,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-23 16:15:14,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 16:15:14,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:14,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:14,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:14,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:15:14,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:15:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:15,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:15,571 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:15,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:15:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041584972] [2022-11-23 16:15:15,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041584972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:15,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140566727] [2022-11-23 16:15:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:15,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:15:15,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:15:15,574 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:15:15,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-11-23 16:15:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 16:15:16,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:16,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:16,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:16,430 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 11 treesize of output 5 [2022-11-23 16:15:16,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:15:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:16,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:16,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140566727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:16,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679469884] [2022-11-23 16:15:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:15:16,862 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:15:16,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-23 16:15:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:17,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 16:15:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:17,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:17,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:17,444 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 11 treesize of output 5 [2022-11-23 16:15:17,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:15:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:17,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679469884] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:17,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:15:17,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 13, 9, 13, 9] total 19 [2022-11-23 16:15:17,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438084410] [2022-11-23 16:15:17,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:15:17,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 16:15:17,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:15:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 16:15:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2022-11-23 16:15:17,875 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:15:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:21,281 INFO L93 Difference]: Finished difference Result 199 states and 233 transitions. [2022-11-23 16:15:21,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 16:15:21,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 65 [2022-11-23 16:15:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:21,283 INFO L225 Difference]: With dead ends: 199 [2022-11-23 16:15:21,284 INFO L226 Difference]: Without dead ends: 199 [2022-11-23 16:15:21,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 368 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 16:15:21,285 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 104 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:21,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 527 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 16:15:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-23 16:15:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 170. [2022-11-23 16:15:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 145 states have (on average 1.1793103448275861) internal successors, (171), 151 states have internal predecessors, (171), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (21), 14 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-23 16:15:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2022-11-23 16:15:21,307 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 65 [2022-11-23 16:15:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:21,308 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2022-11-23 16:15:21,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-23 16:15:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2022-11-23 16:15:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-23 16:15:21,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:21,309 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:21,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:21,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-23 16:15:21,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-11-23 16:15:21,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:21,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:15:21,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:21,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1133093937, now seen corresponding path program 2 times [2022-11-23 16:15:21,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:15:21,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [14045806] [2022-11-23 16:15:21,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:15:21,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:21,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:15:21,913 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:15:21,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-23 16:15:22,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:15:22,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:15:22,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:15:22,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:22,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 16:15:22,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:15:22,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [14045806] [2022-11-23 16:15:22,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [14045806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:15:22,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:15:22,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:15:22,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553609624] [2022-11-23 16:15:22,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:15:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 16:15:22,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:15:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 16:15:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:15:22,331 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:15:22,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:22,365 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-11-23 16:15:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:15:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-11-23 16:15:22,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:22,366 INFO L225 Difference]: With dead ends: 133 [2022-11-23 16:15:22,366 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 16:15:22,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:15:22,368 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:22,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 164 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:15:22,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 16:15:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 118. [2022-11-23 16:15:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 100 states have (on average 1.13) internal successors, (113), 107 states have internal predecessors, (113), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:15:22,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 126 transitions. [2022-11-23 16:15:22,374 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 126 transitions. Word has length 65 [2022-11-23 16:15:22,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:22,374 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 126 transitions. [2022-11-23 16:15:22,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 16:15:22,374 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 126 transitions. [2022-11-23 16:15:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 16:15:22,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:22,375 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:22,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:22,576 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:15:22,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:22,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1490737222, now seen corresponding path program 1 times [2022-11-23 16:15:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:15:22,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444179762] [2022-11-23 16:15:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:22,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:22,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:15:22,579 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:15:22,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-23 16:15:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 16:15:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:22,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:23,387 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:15:23,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:15:23,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:23,696 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 7 treesize of output 5 [2022-11-23 16:15:27,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:15:28,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:15:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:15:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:15:29,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:15:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444179762] [2022-11-23 16:15:29,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444179762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:29,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356962204] [2022-11-23 16:15:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:15:29,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:15:29,413 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:15:29,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-23 16:15:30,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:30,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 16:15:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:30,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:30,434 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:15:30,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:15:30,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:30,707 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 7 treesize of output 5 [2022-11-23 16:15:32,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:15:32,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:15:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:15:32,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:33,358 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 8 treesize of output 6 [2022-11-23 16:15:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 16:15:33,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356962204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:33,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128359422] [2022-11-23 16:15:33,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:15:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:33,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:15:33,818 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:15:33,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-23 16:15:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:15:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 16:15:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:34,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:34,465 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:15:34,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:15:34,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:15:36,735 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_49| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_49|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_49|))) is different from true [2022-11-23 16:15:36,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:15:37,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:15:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 145 trivial. 6 not checked. [2022-11-23 16:15:37,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:15:37,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 16:15:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:15:37,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128359422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:15:37,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:15:37,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15, 14, 15, 13] total 38 [2022-11-23 16:15:37,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220854573] [2022-11-23 16:15:37,874 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:15:37,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 16:15:37,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:15:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 16:15:37,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1279, Unknown=2, NotChecked=72, Total=1482 [2022-11-23 16:15:37,877 INFO L87 Difference]: Start difference. First operand 118 states and 126 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 33 states have internal predecessors, (89), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 16:15:39,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:41,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:44,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:50,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:52,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:54,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:15:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:15:56,461 INFO L93 Difference]: Finished difference Result 138 states and 144 transitions. [2022-11-23 16:15:56,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 16:15:56,462 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 33 states have internal predecessors, (89), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 66 [2022-11-23 16:15:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:15:56,463 INFO L225 Difference]: With dead ends: 138 [2022-11-23 16:15:56,463 INFO L226 Difference]: Without dead ends: 138 [2022-11-23 16:15:56,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 339 SyntacticMatches, 16 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=394, Invalid=3148, Unknown=2, NotChecked=116, Total=3660 [2022-11-23 16:15:56,464 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 195 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 40 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:15:56,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 524 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 864 Invalid, 6 Unknown, 78 Unchecked, 14.1s Time] [2022-11-23 16:15:56,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-11-23 16:15:56,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2022-11-23 16:15:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 111 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:15:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2022-11-23 16:15:56,470 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 66 [2022-11-23 16:15:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:15:56,470 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2022-11-23 16:15:56,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 33 states have internal predecessors, (89), 7 states have call successors, (7), 6 states have call predecessors, (7), 9 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-23 16:15:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2022-11-23 16:15:56,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 16:15:56,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:15:56,472 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:15:56,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-23 16:15:56,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-23 16:15:56,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-11-23 16:15:57,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:15:57,079 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:15:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:15:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash -280378112, now seen corresponding path program 2 times [2022-11-23 16:15:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:15:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495186932] [2022-11-23 16:15:57,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:15:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:15:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:15:57,081 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:15:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-23 16:15:57,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:15:57,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:15:57,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:15:57,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:15:57,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:15:57,515 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:15:58,111 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2987 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2987) |c_#length|)))) is different from true [2022-11-23 16:15:58,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:58,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:15:58,152 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:15:58,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:15:58,340 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2988 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2988))))) is different from true [2022-11-23 16:15:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:58,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:15:58,379 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:15:58,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:15:58,574 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2989 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2989) |c_#length|)))) is different from true [2022-11-23 16:15:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:15:58,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:15:58,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:15:58,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:15:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 151 trivial. 12 not checked. [2022-11-23 16:15:58,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:01,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:16:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495186932] [2022-11-23 16:16:01,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495186932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:01,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257252419] [2022-11-23 16:16:01,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:16:01,349 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:16:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:16:01,350 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:16:01,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-23 16:16:02,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:16:02,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:16:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:16:02,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:02,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:16:02,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:16:02,669 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3075 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3075))))) is different from true [2022-11-23 16:16:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:02,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:02,721 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:02,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:02,839 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3076 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3076))))) is different from true [2022-11-23 16:16:02,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:02,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:02,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:02,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:02,980 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_3077 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3077) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:16:03,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:03,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:03,030 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:03,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 151 trivial. 12 not checked. [2022-11-23 16:16:03,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:05,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257252419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:05,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058865217] [2022-11-23 16:16:05,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:16:05,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:05,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:16:05,407 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:16:05,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-23 16:16:05,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:16:05,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:16:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:16:05,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:05,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:16:05,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:16:06,221 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3163 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3163) |c_#length|)))) is different from true [2022-11-23 16:16:06,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:06,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:06,276 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:06,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:06,375 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3164 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3164) |c_#length|)))) is different from true [2022-11-23 16:16:06,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:06,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:06,417 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:06,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:06,520 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_3165 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_3165) |c_#length|)))) is different from true [2022-11-23 16:16:06,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:16:06,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:16:06,560 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:16:06,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:16:06,591 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 151 trivial. 12 not checked. [2022-11-23 16:16:06,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:10,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058865217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:10,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:16:10,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 22 [2022-11-23 16:16:10,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660561425] [2022-11-23 16:16:10,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:16:10,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 16:16:10,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:16:10,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 16:16:10,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=207, Unknown=10, NotChecked=324, Total=600 [2022-11-23 16:16:10,986 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 16:16:12,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:16:12,656 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2022-11-23 16:16:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 16:16:12,659 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 70 [2022-11-23 16:16:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:16:12,661 INFO L225 Difference]: With dead ends: 184 [2022-11-23 16:16:12,661 INFO L226 Difference]: Without dead ends: 184 [2022-11-23 16:16:12,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=125, Invalid=603, Unknown=10, NotChecked=522, Total=1260 [2022-11-23 16:16:12,662 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 177 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 798 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:16:12,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 370 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 449 Invalid, 0 Unknown, 798 Unchecked, 0.9s Time] [2022-11-23 16:16:12,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-23 16:16:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 123. [2022-11-23 16:16:12,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 104 states have (on average 1.125) internal successors, (117), 111 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:16:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-11-23 16:16:12,668 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 70 [2022-11-23 16:16:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:16:12,669 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-11-23 16:16:12,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.142857142857143) internal successors, (45), 22 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 16:16:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-11-23 16:16:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 16:16:12,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:16:12,671 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:16:12,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-23 16:16:12,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-23 16:16:13,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-11-23 16:16:13,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:13,281 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:16:13,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:16:13,281 INFO L85 PathProgramCache]: Analyzing trace with hash -590692744, now seen corresponding path program 1 times [2022-11-23 16:16:13,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:16:13,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1146477611] [2022-11-23 16:16:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:13,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:13,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:16:13,284 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:16:13,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-23 16:16:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:13,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:16:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:13,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:13,880 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:16:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1146477611] [2022-11-23 16:16:13,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1146477611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2099624258] [2022-11-23 16:16:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:13,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:16:13,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:16:13,884 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:16:13,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-23 16:16:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:16:14,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:14,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:14,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2099624258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886104589] [2022-11-23 16:16:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:16:14,684 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:16:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-23 16:16:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 16:16:15,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-23 16:16:15,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886104589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:15,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:16:15,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2022-11-23 16:16:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172234121] [2022-11-23 16:16:15,425 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:16:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 16:16:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:16:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 16:16:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-23 16:16:15,427 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 16:16:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:16:15,727 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2022-11-23 16:16:15,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:16:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 69 [2022-11-23 16:16:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:16:15,730 INFO L225 Difference]: With dead ends: 146 [2022-11-23 16:16:15,730 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 16:16:15,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:16:15,730 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:16:15,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 374 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:16:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 16:16:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2022-11-23 16:16:15,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.117117117117117) internal successors, (124), 118 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:16:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2022-11-23 16:16:15,736 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 69 [2022-11-23 16:16:15,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:16:15,739 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2022-11-23 16:16:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 16:16:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2022-11-23 16:16:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 16:16:15,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:16:15,740 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:16:15,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-23 16:16:15,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-11-23 16:16:16,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-23 16:16:16,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:16,343 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:16:16,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:16:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -513282356, now seen corresponding path program 1 times [2022-11-23 16:16:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:16:16,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11615796] [2022-11-23 16:16:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:16,344 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:16,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:16:16,345 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:16:16,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-23 16:16:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:16,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:16:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:16,955 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 16:16:16,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-23 16:16:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:17,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:16:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11615796] [2022-11-23 16:16:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11615796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140950349] [2022-11-23 16:16:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:17,031 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:16:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:16:17,035 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:16:17,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-23 16:16:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:17,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:16:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:17,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:17,846 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 16:16:17,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-23 16:16:17,923 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:17,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140950349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:17,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198488051] [2022-11-23 16:16:17,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:17,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:16:17,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:16:17,926 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:16:17,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-23 16:16:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 16:16:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:18,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:18,476 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 16:16:18,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2022-11-23 16:16:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-23 16:16:18,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198488051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:16:18,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:16:18,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-23 16:16:18,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716126576] [2022-11-23 16:16:18,539 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:16:18,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 16:16:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:16:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 16:16:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 16:16:18,541 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:16:18,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:16:18,682 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-11-23 16:16:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 16:16:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-11-23 16:16:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:16:18,684 INFO L225 Difference]: With dead ends: 133 [2022-11-23 16:16:18,684 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 16:16:18,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 16:16:18,685 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:16:18,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:16:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 16:16:18,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2022-11-23 16:16:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 112 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 16:16:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2022-11-23 16:16:18,690 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 73 [2022-11-23 16:16:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:16:18,690 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2022-11-23 16:16:18,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:16:18,691 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2022-11-23 16:16:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-23 16:16:18,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:16:18,692 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:16:18,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-23 16:16:18,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-23 16:16:19,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-11-23 16:16:19,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:19,293 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:16:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:16:19,293 INFO L85 PathProgramCache]: Analyzing trace with hash 656898895, now seen corresponding path program 1 times [2022-11-23 16:16:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:16:19,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955499518] [2022-11-23 16:16:19,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:19,294 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:16:19,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:16:19,296 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:16:19,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-23 16:16:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:19,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:16:19,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:20,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:16:20,832 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-23 16:16:20,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-23 16:16:21,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-23 16:16:35,754 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (exists ((|v_ULTIMATE.start_alloc_17_#t~mem41#1.base_56| (_ BitVec 32)) (v_ArrVal_3709 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_3709))) (and (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_56| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (select .cse0 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_56|) (_ bv0 1))))))) is different from true [2022-11-23 16:16:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:16:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:16:45,217 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_17_#t~ret39#1.base_174| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_174|))) (= (store (store |c_#valid| |v_ULTIMATE.start_alloc_17_#t~ret39#1.base_174| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-23 16:16:45,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:16:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955499518] [2022-11-23 16:16:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955499518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:16:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121741504] [2022-11-23 16:16:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:16:45,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:16:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:16:45,221 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:16:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-23 16:16:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:16:46,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 16:16:46,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:16:56,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:17:00,917 INFO L321 Elim1Store]: treesize reduction 34, result has 12.8 percent of original size [2022-11-23 16:17:00,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 36 [2022-11-23 16:17:01,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 33 treesize of output 21 [2022-11-23 16:17:16,706 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_alloc_17_#t~mem41#1.base_58| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (v_ArrVal_3709 (_ BitVec 1))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_3709))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_58| (_ bv0 1)))) (and (= |c_#valid| (store .cse0 |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (bvadd (select .cse0 |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv1 1))) (= (_ bv0 1) (select .cse1 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_58|)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-11-23 16:17:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:17:16,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:17:17,715 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 24 treesize of output 22 [2022-11-23 16:17:40,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121741504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:17:40,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962866194] [2022-11-23 16:17:40,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:17:40,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:17:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:17:40,227 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:17:40,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-23 16:17:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:17:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 16:17:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:17:41,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:17:41,303 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-23 16:17:41,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-23 16:17:41,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:17:41,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:17:41,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 24 [2022-11-23 16:18:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:18:04,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962866194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:28,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:18:28,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 33 [2022-11-23 16:18:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967433621] [2022-11-23 16:18:28,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:18:28,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 16:18:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:18:28,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 16:18:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3226, Unknown=39, NotChecked=354, Total=3906 [2022-11-23 16:18:28,075 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 34 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:18:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:18:37,991 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2022-11-23 16:18:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 16:18:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 75 [2022-11-23 16:18:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:18:37,993 INFO L225 Difference]: With dead ends: 131 [2022-11-23 16:18:37,993 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 16:18:37,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 243 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 128.7s TimeCoverageRelationStatistics Valid=595, Invalid=5384, Unknown=39, NotChecked=462, Total=6480 [2022-11-23 16:18:38,003 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 114 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:18:38,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 408 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 741 Invalid, 0 Unknown, 138 Unchecked, 2.8s Time] [2022-11-23 16:18:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 16:18:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-11-23 16:18:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 100 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 16:18:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2022-11-23 16:18:38,008 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 75 [2022-11-23 16:18:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:18:38,009 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2022-11-23 16:18:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 16:18:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2022-11-23 16:18:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 16:18:38,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:18:38,011 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:18:38,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:38,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-11-23 16:18:38,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-11-23 16:18:38,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:18:38,622 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:18:38,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:18:38,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1985522429, now seen corresponding path program 1 times [2022-11-23 16:18:38,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:18:38,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1422431546] [2022-11-23 16:18:38,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:18:38,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:18:38,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:18:38,626 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:18:38,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-23 16:18:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:18:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:18:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:39,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:39,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:18:39,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1422431546] [2022-11-23 16:18:39,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1422431546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:39,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [605350013] [2022-11-23 16:18:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:18:39,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:18:39,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:18:39,288 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:18:39,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-23 16:18:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:18:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:18:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:40,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [605350013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338955997] [2022-11-23 16:18:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:18:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:18:40,184 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:18:40,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-23 16:18:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:18:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 16:18:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:40,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:18:40,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338955997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:40,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:18:40,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-23 16:18:40,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964840000] [2022-11-23 16:18:40,733 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:18:40,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 16:18:40,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:18:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 16:18:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:18:40,735 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 16:18:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:18:41,306 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2022-11-23 16:18:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:18:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 78 [2022-11-23 16:18:41,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:18:41,309 INFO L225 Difference]: With dead ends: 149 [2022-11-23 16:18:41,309 INFO L226 Difference]: Without dead ends: 149 [2022-11-23 16:18:41,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-11-23 16:18:41,310 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:18:41,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 223 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 16:18:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-23 16:18:41,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 122. [2022-11-23 16:18:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 110 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 16:18:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2022-11-23 16:18:41,316 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 78 [2022-11-23 16:18:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:18:41,317 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2022-11-23 16:18:41,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 10 states have internal predecessors, (51), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 16:18:41,317 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2022-11-23 16:18:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 16:18:41,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:18:41,318 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:18:41,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:41,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-23 16:18:41,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:41,936 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:18:41,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:18:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1246142796, now seen corresponding path program 3 times [2022-11-23 16:18:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:18:41,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865915161] [2022-11-23 16:18:41,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:18:41,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:18:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:18:41,938 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:18:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-23 16:18:42,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:18:42,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:42,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 16:18:42,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:42,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:18:42,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:18:43,099 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_4219 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4219) |c_#length|)))) is different from true [2022-11-23 16:18:43,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:43,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:43,144 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:43,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:43,345 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_4220 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4220) |c_#length|)))) is different from true [2022-11-23 16:18:43,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:43,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:43,396 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:43,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:43,646 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_4221 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4221) |c_#length|)))) is different from true [2022-11-23 16:18:43,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:43,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:43,698 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:43,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:43,916 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_4222 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4222) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:18:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:43,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:43,963 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:43,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 157 trivial. 20 not checked. [2022-11-23 16:18:44,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:46,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:18:46,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865915161] [2022-11-23 16:18:46,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865915161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:46,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770965759] [2022-11-23 16:18:46,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:18:46,721 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:18:46,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:18:46,722 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:18:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-23 16:18:47,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:18:47,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:47,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 16:18:47,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:47,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:18:47,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:18:48,097 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:18:48,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-23 16:18:48,128 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:48,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:48,503 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:48,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:48,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:48,792 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_4320 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4320))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:18:48,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:48,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:48,830 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:48,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:48,941 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_4321 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4321) |c_#length|)))) is different from true [2022-11-23 16:18:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:48,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:48,992 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:48,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 159 trivial. 14 not checked. [2022-11-23 16:18:49,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:49,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770965759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263025582] [2022-11-23 16:18:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 16:18:49,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:18:49,544 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:18:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-11-23 16:18:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 16:18:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:49,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 16:18:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:50,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:18:50,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:18:50,481 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_4415 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4415))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:18:50,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:50,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:50,532 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:50,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:50,670 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_4416 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4416) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:18:50,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:50,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:50,719 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:50,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:50,827 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_4417 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4417) |c_#length|)))) is different from true [2022-11-23 16:18:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:50,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:50,864 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:50,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:50,989 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_4418 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_4418) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:18:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:18:51,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:18:51,043 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:18:51,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:18:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 157 trivial. 20 not checked. [2022-11-23 16:18:51,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:51,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263025582] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:18:51,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:18:51,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 30 [2022-11-23 16:18:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871907200] [2022-11-23 16:18:51,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:18:51,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 16:18:51,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:18:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 16:18:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=448, Unknown=11, NotChecked=510, Total=1056 [2022-11-23 16:18:51,596 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-23 16:18:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:18:54,534 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2022-11-23 16:18:54,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 16:18:54,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-11-23 16:18:54,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:18:54,537 INFO L225 Difference]: With dead ends: 176 [2022-11-23 16:18:54,537 INFO L226 Difference]: Without dead ends: 176 [2022-11-23 16:18:54,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=183, Invalid=1252, Unknown=11, NotChecked=810, Total=2256 [2022-11-23 16:18:54,539 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 192 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 21 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 1715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 935 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:18:54,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 522 Invalid, 1715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 745 Invalid, 14 Unknown, 935 Unchecked, 1.6s Time] [2022-11-23 16:18:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-23 16:18:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 126. [2022-11-23 16:18:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 113 states have internal predecessors, (118), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:18:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2022-11-23 16:18:54,557 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 80 [2022-11-23 16:18:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:18:54,558 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2022-11-23 16:18:54,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-11-23 16:18:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2022-11-23 16:18:54,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 16:18:54,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:18:54,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:18:54,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Forceful destruction successful, exit code 0 [2022-11-23 16:18:54,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-11-23 16:18:54,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-11-23 16:18:55,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:18:55,174 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:18:55,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:18:55,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1176035772, now seen corresponding path program 2 times [2022-11-23 16:18:55,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:18:55,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057972327] [2022-11-23 16:18:55,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:18:55,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:18:55,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:18:55,176 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:18:55,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-23 16:18:55,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:18:55,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:18:55,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 16:18:55,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:18:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:18:56,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:18:56,877 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 34 treesize of output 30 [2022-11-23 16:18:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:18:59,690 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:18:59,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057972327] [2022-11-23 16:18:59,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057972327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:18:59,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326026124] [2022-11-23 16:18:59,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:18:59,691 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:18:59,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:18:59,692 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:18:59,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-11-23 16:19:00,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:19:00,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:19:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:19:00,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:01,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:01,400 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 34 treesize of output 30 [2022-11-23 16:19:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:03,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1326026124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:03,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116558456] [2022-11-23 16:19:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:19:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:03,398 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:03,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-11-23 16:19:03,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:19:03,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:19:03,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 16:19:03,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:04,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:04,431 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 34 treesize of output 30 [2022-11-23 16:19:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:05,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116558456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:05,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:19:05,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10, 10, 10, 10] total 25 [2022-11-23 16:19:05,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924504281] [2022-11-23 16:19:05,385 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:05,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 16:19:05,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:19:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 16:19:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-11-23 16:19:05,388 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand has 26 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-23 16:19:14,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:14,507 INFO L93 Difference]: Finished difference Result 290 states and 299 transitions. [2022-11-23 16:19:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 16:19:14,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-11-23 16:19:14,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:14,511 INFO L225 Difference]: With dead ends: 290 [2022-11-23 16:19:14,511 INFO L226 Difference]: Without dead ends: 290 [2022-11-23 16:19:14,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=519, Invalid=2031, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 16:19:14,512 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 977 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:14,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 532 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 16:19:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-23 16:19:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 141. [2022-11-23 16:19:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 128 states have internal predecessors, (143), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:19:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2022-11-23 16:19:14,519 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 79 [2022-11-23 16:19:14,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:14,520 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2022-11-23 16:19:14,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-23 16:19:14,520 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2022-11-23 16:19:14,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 16:19:14,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:14,521 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:14,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:14,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-11-23 16:19:14,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-11-23 16:19:15,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:15,138 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:19:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:15,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2097370558, now seen corresponding path program 1 times [2022-11-23 16:19:15,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:19:15,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286622801] [2022-11-23 16:19:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:15,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:15,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:19:15,140 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:19:15,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-23 16:19:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:15,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:15,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:16,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:16,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:16,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:16,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:16,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:19:16,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:17,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:19:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286622801] [2022-11-23 16:19:17,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286622801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814746833] [2022-11-23 16:19:17,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:17,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:19:17,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:19:17,199 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:19:17,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-23 16:19:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:19,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:19,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:19,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:19,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:20,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:20,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:20,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:19:20,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:20,293 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:20,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814746833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:20,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402636299] [2022-11-23 16:19:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:20,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:20,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:20,295 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-23 16:19:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:20,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:20,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:21,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:21,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:21,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:21,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:19:21,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402636299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:21,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:19:21,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14, 10, 14, 10] total 21 [2022-11-23 16:19:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023281465] [2022-11-23 16:19:21,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 16:19:21,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:19:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 16:19:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-11-23 16:19:21,624 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 16:19:26,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:19:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:27,816 INFO L93 Difference]: Finished difference Result 182 states and 195 transitions. [2022-11-23 16:19:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 16:19:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 80 [2022-11-23 16:19:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:27,819 INFO L225 Difference]: With dead ends: 182 [2022-11-23 16:19:27,819 INFO L226 Difference]: Without dead ends: 182 [2022-11-23 16:19:27,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 444 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=368, Invalid=2082, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 16:19:27,821 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 536 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:27,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 439 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 581 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 16:19:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-23 16:19:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2022-11-23 16:19:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 132 states have internal predecessors, (147), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:19:27,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2022-11-23 16:19:27,827 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 80 [2022-11-23 16:19:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:27,828 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2022-11-23 16:19:27,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 16:19:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2022-11-23 16:19:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 16:19:27,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:27,829 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:27,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:28,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:28,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-23 16:19:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:28,442 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:19:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:28,442 INFO L85 PathProgramCache]: Analyzing trace with hash -593977757, now seen corresponding path program 1 times [2022-11-23 16:19:28,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:19:28,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [400211029] [2022-11-23 16:19:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:28,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:19:28,444 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:19:28,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-23 16:19:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:29,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:29,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:29,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:30,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:30,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:30,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:19:30,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:31,173 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:31,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:19:31,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [400211029] [2022-11-23 16:19:31,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [400211029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:31,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419489925] [2022-11-23 16:19:31,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:31,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:19:31,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:19:31,175 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:19:31,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-23 16:19:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:33,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:33,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:33,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:33,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:33,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:34,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:34,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:34,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:19:34,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:34,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [419489925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386162704] [2022-11-23 16:19:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:34,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:34,501 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:34,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-23 16:19:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:34,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 16:19:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:35,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:35,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:35,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 16:19:35,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 16:19:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-23 16:19:35,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-11-23 16:19:36,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386162704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:19:36,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:19:36,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 15, 10, 15, 10] total 22 [2022-11-23 16:19:36,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017770057] [2022-11-23 16:19:36,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:36,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 16:19:36,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:19:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 16:19:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-11-23 16:19:36,036 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 16:19:42,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:19:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:45,254 INFO L93 Difference]: Finished difference Result 180 states and 193 transitions. [2022-11-23 16:19:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 16:19:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 81 [2022-11-23 16:19:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:45,257 INFO L225 Difference]: With dead ends: 180 [2022-11-23 16:19:45,257 INFO L226 Difference]: Without dead ends: 180 [2022-11-23 16:19:45,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 449 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 16:19:45,258 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 490 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:45,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 415 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 770 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-23 16:19:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-23 16:19:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 146. [2022-11-23 16:19:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 128 states have (on average 1.1484375) internal successors, (147), 133 states have internal predecessors, (147), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:19:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2022-11-23 16:19:45,263 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 81 [2022-11-23 16:19:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:45,264 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2022-11-23 16:19:45,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.4545454545454546) internal successors, (76), 20 states have internal predecessors, (76), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-23 16:19:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2022-11-23 16:19:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-23 16:19:45,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:45,266 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:45,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:45,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:45,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-23 16:19:45,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:45,878 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:19:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1233441180, now seen corresponding path program 1 times [2022-11-23 16:19:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:19:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814723633] [2022-11-23 16:19:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:45,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:45,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:19:45,882 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:19:45,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-23 16:19:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 16:19:46,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:46,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:19:46,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:46,931 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 11 treesize of output 5 [2022-11-23 16:19:47,071 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 16:19:47,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 16:19:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:47,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-23 16:19:47,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:19:48,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 32 [2022-11-23 16:19:48,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:48,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:19:48,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2022-11-23 16:19:48,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:19:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 16:19:48,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:49,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:19:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814723633] [2022-11-23 16:19:49,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814723633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:19:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312892635] [2022-11-23 16:19:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:19:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:19:49,450 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:19:49,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-23 16:19:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:51,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-23 16:19:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:51,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:19:51,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:52,013 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 11 treesize of output 5 [2022-11-23 16:19:52,122 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 16:19:52,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 16:19:52,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:52,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-23 16:19:52,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:19:52,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 32 [2022-11-23 16:19:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:52,677 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:19:52,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2022-11-23 16:19:52,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:19:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 59 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-23 16:19:52,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:53,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1312892635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:19:53,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588408719] [2022-11-23 16:19:53,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:53,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:19:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:19:53,090 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:19:53,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-11-23 16:19:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 16:19:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:53,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:19:53,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:19:53,782 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 11 treesize of output 5 [2022-11-23 16:19:53,886 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 16:19:53,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 16:19:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:53,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-11-23 16:19:54,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:19:54,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 32 [2022-11-23 16:19:54,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:19:54,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:19:54,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2022-11-23 16:19:54,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:19:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:19:54,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:19:54,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588408719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:19:54,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:19:54,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 23 [2022-11-23 16:19:54,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724383814] [2022-11-23 16:19:54,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:19:54,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 16:19:54,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:19:54,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 16:19:54,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-11-23 16:19:54,862 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 16:19:58,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:19:58,075 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-11-23 16:19:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 16:19:58,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 82 [2022-11-23 16:19:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:19:58,077 INFO L225 Difference]: With dead ends: 146 [2022-11-23 16:19:58,077 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 16:19:58,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 255 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=186, Invalid=1884, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 16:19:58,078 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 85 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:19:58,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 453 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 868 Invalid, 2 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 16:19:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 16:19:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-23 16:19:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 128 states have (on average 1.140625) internal successors, (146), 133 states have internal predecessors, (146), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:19:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-11-23 16:19:58,084 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 82 [2022-11-23 16:19:58,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:19:58,084 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-11-23 16:19:58,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 16:19:58,085 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-11-23 16:19:58,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 16:19:58,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:19:58,086 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:19:58,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-11-23 16:19:58,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-23 16:19:58,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-23 16:19:58,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:58,687 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:19:58,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:19:58,687 INFO L85 PathProgramCache]: Analyzing trace with hash 418029190, now seen corresponding path program 1 times [2022-11-23 16:19:58,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:19:58,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782689710] [2022-11-23 16:19:58,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:19:58,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:19:58,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:19:58,689 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:19:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-23 16:19:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:19:59,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:19:59,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:19:59,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:19:59,677 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:19:59,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:19:59,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:20:01,944 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_123| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_123|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_123|))) is different from true [2022-11-23 16:20:02,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:02,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:04,171 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_124| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_124| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_124|) (_ bv0 32))))) is different from true [2022-11-23 16:20:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:04,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:20:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:20:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2022-11-23 16:20:04,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:05,175 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 8 treesize of output 6 [2022-11-23 16:20:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:20:06,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:20:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782689710] [2022-11-23 16:20:06,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782689710] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:06,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360563801] [2022-11-23 16:20:06,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:20:06,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:20:06,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:20:06,574 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:20:06,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-23 16:20:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:20:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 16:20:08,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:08,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:20:09,307 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:20:09,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:20:09,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:20:11,457 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_129| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_129|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_129|))) is different from true [2022-11-23 16:20:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:11,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:13,638 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_130| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_130|) (_ bv0 32)) |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_130|))) is different from true [2022-11-23 16:20:13,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:13,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:13,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:20:13,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:20:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2022-11-23 16:20:13,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:14,455 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 8 treesize of output 6 [2022-11-23 16:20:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:20:15,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360563801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155709751] [2022-11-23 16:20:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:20:15,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:20:15,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:20:15,016 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:20:15,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-11-23 16:20:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:20:15,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:20:15,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:15,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:20:15,868 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:20:15,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:20:15,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:20:18,034 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_135| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_135| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_135|) (_ bv0 32))))) is different from true [2022-11-23 16:20:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:18,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:20,193 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_136| (_ BitVec 32))) (not (= |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_136| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_alloc_17_~array#1.base_BEFORE_CALL_136|) (_ bv0 32))))) is different from true [2022-11-23 16:20:20,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:20:20,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-23 16:20:20,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-23 16:20:20,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 16:20:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 145 trivial. 16 not checked. [2022-11-23 16:20:20,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:20,646 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 8 treesize of output 6 [2022-11-23 16:20:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 16:20:21,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155709751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:21,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:20:21,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 19, 16, 19, 16] total 37 [2022-11-23 16:20:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167676085] [2022-11-23 16:20:21,177 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:20:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 16:20:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:20:21,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 16:20:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=910, Unknown=6, NotChecked=390, Total=1406 [2022-11-23 16:20:21,179 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 38 states, 37 states have (on average 2.72972972972973) internal successors, (101), 34 states have internal predecessors, (101), 7 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 16:20:44,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:20:46,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:20:48,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:20:50,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 16:20:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:20:51,813 INFO L93 Difference]: Finished difference Result 164 states and 176 transitions. [2022-11-23 16:20:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 16:20:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.72972972972973) internal successors, (101), 34 states have internal predecessors, (101), 7 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 83 [2022-11-23 16:20:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:20:51,815 INFO L225 Difference]: With dead ends: 164 [2022-11-23 16:20:51,815 INFO L226 Difference]: Without dead ends: 164 [2022-11-23 16:20:51,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 438 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=428, Invalid=3370, Unknown=8, NotChecked=750, Total=4556 [2022-11-23 16:20:51,816 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 272 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 61 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:20:51,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 597 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 974 Invalid, 2 Unknown, 576 Unchecked, 10.0s Time] [2022-11-23 16:20:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-23 16:20:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2022-11-23 16:20:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 130 states have (on average 1.1384615384615384) internal successors, (148), 135 states have internal predecessors, (148), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:20:51,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2022-11-23 16:20:51,837 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 83 [2022-11-23 16:20:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:20:51,838 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2022-11-23 16:20:51,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.72972972972973) internal successors, (101), 34 states have internal predecessors, (101), 7 states have call successors, (11), 9 states have call predecessors, (11), 10 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-23 16:20:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2022-11-23 16:20:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-23 16:20:51,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:20:51,839 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:20:51,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (88)] Forceful destruction successful, exit code 0 [2022-11-23 16:20:52,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-11-23 16:20:52,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-23 16:20:52,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:20:52,452 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:20:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:20:52,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1306673498, now seen corresponding path program 2 times [2022-11-23 16:20:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:20:52,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310321850] [2022-11-23 16:20:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:20:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:20:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:20:52,455 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:20:52,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-23 16:20:52,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:20:52,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:20:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:20:52,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:53,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:53,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:20:53,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310321850] [2022-11-23 16:20:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310321850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:53,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [626759031] [2022-11-23 16:20:53,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:20:53,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:20:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:20:53,479 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:20:53,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-23 16:20:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:20:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:20:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 16:20:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:54,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:54,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [626759031] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:54,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234904501] [2022-11-23 16:20:54,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:20:54,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:20:54,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:20:54,701 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:20:54,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-23 16:20:55,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:20:55,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:20:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 16:20:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:55,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-11-23 16:20:56,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234904501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:56,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:20:56,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2022-11-23 16:20:56,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48352718] [2022-11-23 16:20:56,083 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:20:56,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 16:20:56,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:20:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 16:20:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-11-23 16:20:56,084 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 16:20:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:20:56,704 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2022-11-23 16:20:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:20:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2022-11-23 16:20:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:20:56,706 INFO L225 Difference]: With dead ends: 155 [2022-11-23 16:20:56,707 INFO L226 Difference]: Without dead ends: 155 [2022-11-23 16:20:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-11-23 16:20:56,708 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 106 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 16:20:56,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 525 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 16:20:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-23 16:20:56,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2022-11-23 16:20:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 122 states have (on average 1.098360655737705) internal successors, (134), 127 states have internal predecessors, (134), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2022-11-23 16:20:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2022-11-23 16:20:56,713 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 87 [2022-11-23 16:20:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:20:56,714 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2022-11-23 16:20:56,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 16:20:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2022-11-23 16:20:56,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 16:20:56,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:20:56,715 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:20:56,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-11-23 16:20:56,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-11-23 16:20:57,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-23 16:20:57,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:20:57,328 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:20:57,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:20:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash -891953512, now seen corresponding path program 1 times [2022-11-23 16:20:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:20:57,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [881015561] [2022-11-23 16:20:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:20:57,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:20:57,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:20:57,330 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:20:57,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-23 16:20:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:20:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:20:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:20:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:20:58,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:20:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:20:58,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:20:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [881015561] [2022-11-23 16:20:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [881015561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:20:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752942947] [2022-11-23 16:20:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:20:58,775 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:20:58,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:20:58,779 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:20:58,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-23 16:20:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:20:59,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:20:59,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:21:00,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:21:00,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752942947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:21:00,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073151744] [2022-11-23 16:21:00,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:21:00,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:21:00,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:21:00,386 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:21:00,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-23 16:21:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:21:00,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 16:21:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:21:01,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2022-11-23 16:21:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073151744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:21:01,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 16:21:01,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-11-23 16:21:01,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126803563] [2022-11-23 16:21:01,437 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 16:21:01,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 16:21:01,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:21:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 16:21:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-23 16:21:01,439 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 16:21:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:21:02,827 INFO L93 Difference]: Finished difference Result 408 states and 437 transitions. [2022-11-23 16:21:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 16:21:02,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2022-11-23 16:21:02,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:21:02,831 INFO L225 Difference]: With dead ends: 408 [2022-11-23 16:21:02,831 INFO L226 Difference]: Without dead ends: 408 [2022-11-23 16:21:02,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 516 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2022-11-23 16:21:02,832 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 807 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 16:21:02,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 578 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 16:21:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-23 16:21:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 172. [2022-11-23 16:21:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 149 states have (on average 1.1140939597315436) internal successors, (166), 154 states have internal predecessors, (166), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-23 16:21:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2022-11-23 16:21:02,851 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 89 [2022-11-23 16:21:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:21:02,852 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2022-11-23 16:21:02,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-23 16:21:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2022-11-23 16:21:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 16:21:02,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:21:02,853 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:21:02,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:03,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:03,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-11-23 16:21:03,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:21:03,465 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:21:03,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:21:03,465 INFO L85 PathProgramCache]: Analyzing trace with hash -586455192, now seen corresponding path program 4 times [2022-11-23 16:21:03,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:21:03,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025400893] [2022-11-23 16:21:03,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:21:03,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:21:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:21:03,467 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:21:03,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-23 16:21:04,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:21:04,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 16:21:04,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:04,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:21:04,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:21:04,788 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6449 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6449) |c_#length|)))) is different from true [2022-11-23 16:21:04,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:04,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:04,831 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:04,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:05,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6450 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6450) |c_#length|)))) is different from true [2022-11-23 16:21:05,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:05,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:05,085 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:05,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:05,291 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_6451 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6451) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 16:21:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:05,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:05,334 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:05,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:05,549 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6452 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6452) |c_#length|)))) is different from true [2022-11-23 16:21:05,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:05,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:05,594 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:05,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:05,825 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6453 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6453) |c_#length|)))) is different from true [2022-11-23 16:21:05,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:05,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:05,878 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:05,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 165 trivial. 30 not checked. [2022-11-23 16:21:05,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:11,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:21:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025400893] [2022-11-23 16:21:11,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025400893] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:21:11,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1034588509] [2022-11-23 16:21:11,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:21:11,662 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:21:11,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:21:11,664 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:21:11,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-11-23 16:21:12,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:21:12,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:12,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-23 16:21:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:12,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:21:13,013 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:21:13,494 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6555 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6555) |c_#length|)))) is different from true [2022-11-23 16:21:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:13,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:13,539 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:13,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:13,659 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6556 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6556) |c_#length|)))) is different from true [2022-11-23 16:21:13,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:13,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:13,703 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:13,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:13,808 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6557 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6557) |c_#length|)))) is different from true [2022-11-23 16:21:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:13,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:13,845 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:13,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:13,959 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6558 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6558))))) is different from true [2022-11-23 16:21:13,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:13,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:14,003 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:14,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:14,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6559 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6559))))) is different from true [2022-11-23 16:21:14,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:14,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:14,162 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 16:21:14,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 16:21:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 165 trivial. 30 not checked. [2022-11-23 16:21:14,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:16,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1034588509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:21:16,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409332656] [2022-11-23 16:21:16,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 16:21:16,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:21:16,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:21:16,662 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:21:16,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-11-23 16:21:17,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 16:21:17,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 16:21:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:17,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:21:17,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:21:17,742 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_6662 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6662))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6661 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_6661) |c_#valid|)))) is different from true [2022-11-23 16:21:17,810 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:21:17,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:21:17,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:17,961 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6663 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6663) |c_#length|)) (exists ((v_ArrVal_6664 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_6664))))) is different from true [2022-11-23 16:21:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:17,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:18,033 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:21:18,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:21:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:18,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:18,303 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 16:21:18,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 16:21:18,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:18,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:18,897 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 16:21:18,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-23 16:21:19,513 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_6669 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_6669) |c_#length|)))) is different from true [2022-11-23 16:21:19,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:19,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:21:19,616 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-23 16:21:19,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-23 16:21:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 5 proven. 65 refuted. 0 times theorem prover too weak. 167 trivial. 24 not checked. [2022-11-23 16:21:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:20,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409332656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:21:20,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:21:20,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 19] total 35 [2022-11-23 16:21:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286961655] [2022-11-23 16:21:20,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:21:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-23 16:21:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:21:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-23 16:21:20,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=528, Unknown=14, NotChecked=754, Total=1406 [2022-11-23 16:21:20,203 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand has 36 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 8 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-23 16:21:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:21:24,828 INFO L93 Difference]: Finished difference Result 256 states and 282 transitions. [2022-11-23 16:21:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 16:21:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 8 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) Word has length 90 [2022-11-23 16:21:24,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:21:24,830 INFO L225 Difference]: With dead ends: 256 [2022-11-23 16:21:24,831 INFO L226 Difference]: Without dead ends: 256 [2022-11-23 16:21:24,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 240 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=246, Invalid=1514, Unknown=14, NotChecked=1196, Total=2970 [2022-11-23 16:21:24,831 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 363 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 39 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 1974 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:21:24,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 723 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 816 Invalid, 4 Unknown, 1974 Unchecked, 2.2s Time] [2022-11-23 16:21:24,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-23 16:21:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 172. [2022-11-23 16:21:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 13 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-23 16:21:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 195 transitions. [2022-11-23 16:21:24,838 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 195 transitions. Word has length 90 [2022-11-23 16:21:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:21:24,839 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 195 transitions. [2022-11-23 16:21:24,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 35 states have internal predecessors, (81), 8 states have call successors, (8), 2 states have call predecessors, (8), 15 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-23 16:21:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 195 transitions. [2022-11-23 16:21:24,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 16:21:24,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:21:24,841 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:21:24,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:25,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:25,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2022-11-23 16:21:25,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 16:21:25,447 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:21:25,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:21:25,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1366153752, now seen corresponding path program 2 times [2022-11-23 16:21:25,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:21:25,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906638306] [2022-11-23 16:21:25,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:21:25,448 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:21:25,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:21:25,449 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:21:25,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-23 16:21:26,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:21:26,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:26,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 16:21:26,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:26,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:21:26,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:21:26,687 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 11 treesize of output 5 [2022-11-23 16:21:26,833 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 16:21:26,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-23 16:21:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:27,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-23 16:21:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:21:28,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 34 [2022-11-23 16:21:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:28,038 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:21:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-11-23 16:21:28,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:21:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 102 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-23 16:21:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:29,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:21:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906638306] [2022-11-23 16:21:29,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906638306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:21:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864847555] [2022-11-23 16:21:29,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:21:29,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:21:29,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:21:29,621 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:21:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2022-11-23 16:21:30,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 16:21:30,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430103415] [2022-11-23 16:21:30,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:21:30,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:21:30,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:21:30,689 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:21:30,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (100)] Forceful destruction successful, exit code 1 [2022-11-23 16:21:30,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-11-23 16:21:31,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:21:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:31,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 16:21:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:31,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:21:32,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:21:33,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 16:21:33,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:21:33,784 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 11 treesize of output 5 [2022-11-23 16:21:33,894 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 16:21:33,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-23 16:21:34,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:34,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-23 16:21:34,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 16:21:35,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 34 [2022-11-23 16:21:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:21:35,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:21:35,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 32 [2022-11-23 16:21:35,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-23 16:21:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 18 proven. 98 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-23 16:21:35,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:21:37,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430103415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:21:37,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:21:37,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 43 [2022-11-23 16:21:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529380877] [2022-11-23 16:21:37,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:21:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 16:21:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:21:37,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 16:21:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2768, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 16:21:37,051 INFO L87 Difference]: Start difference. First operand 172 states and 195 transitions. Second operand has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 16:21:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:21:42,624 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2022-11-23 16:21:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 16:21:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 92 [2022-11-23 16:21:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:21:42,626 INFO L225 Difference]: With dead ends: 191 [2022-11-23 16:21:42,626 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 16:21:42,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=440, Invalid=5566, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 16:21:42,628 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:21:42,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 755 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1439 Invalid, 2 Unknown, 0 Unchecked, 3.3s Time] [2022-11-23 16:21:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 16:21:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-23 16:21:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 167 states have (on average 1.1017964071856288) internal successors, (184), 171 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-23 16:21:42,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2022-11-23 16:21:42,635 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 92 [2022-11-23 16:21:42,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:21:42,635 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2022-11-23 16:21:42,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 38 states have internal predecessors, (91), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 16:21:42,636 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2022-11-23 16:21:42,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-23 16:21:42,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:21:42,637 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:21:42,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:42,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-11-23 16:21:43,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:21:43,057 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2022-11-23 16:21:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:21:43,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1739385347, now seen corresponding path program 2 times [2022-11-23 16:21:43,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 16:21:43,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929048983] [2022-11-23 16:21:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:21:43,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 16:21:43,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 16:21:43,059 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 16:21:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-11-23 16:21:43,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:21:43,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:21:43,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 16:21:43,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:21:44,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:21:44,820 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-23 16:21:44,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 33 [2022-11-23 16:21:45,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-23 16:21:45,739 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-11-23 16:21:45,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 254 treesize of output 240 [2022-11-23 16:21:46,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:21:46,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 55 [2022-11-23 16:21:49,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 35 [2022-11-23 16:22:04,987 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_7064 (_ BitVec 1)) (v_arrayElimCell_289 (_ BitVec 32)) (v_ArrVal_7076 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_17_#t~mem41#1.base_126| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_7064))) (let ((.cse1 (store .cse0 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_126| v_ArrVal_7076))) (and (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_126|)) (= (_ bv0 1) (select .cse1 v_arrayElimCell_289)) (= (store (store (store .cse1 v_arrayElimCell_289 (_ bv0 1)) |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_126| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|))))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-11-23 16:22:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-23 16:22:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:22:37,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 16:22:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929048983] [2022-11-23 16:22:37,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929048983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:22:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [42553968] [2022-11-23 16:22:37,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:22:37,301 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 16:22:37,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 16:22:37,302 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 16:22:37,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-11-23 16:22:40,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:22:40,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:22:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 16:22:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:22:56,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:23:00,255 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-11-23 16:23:00,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-11-23 16:23:01,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-23 16:23:02,328 INFO L321 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-11-23 16:23:02,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 45 [2022-11-23 16:23:16,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:23:16,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 55 [2022-11-23 16:23:17,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 35 [2022-11-23 16:23:24,411 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_arrayElimCell_300 (_ BitVec 32)) (|v_ULTIMATE.start_alloc_17_#t~mem41#1.base_130| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_130| (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 v_arrayElimCell_300)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (store (store (store .cse0 v_arrayElimCell_300 (_ bv0 1)) |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_130| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select .cse1 |v_ULTIMATE.start_alloc_17_#t~mem41#1.base_130|) (_ bv0 1))))))) is different from true [2022-11-23 16:23:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-23 16:23:24,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:24:02,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [42553968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:24:02,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266542327] [2022-11-23 16:24:02,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 16:24:02,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:24:02,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:24:02,183 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:24:02,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ae5bdcf-e49b-4588-a801-a714ae294ad4/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-11-23 16:24:02,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 16:24:02,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 16:24:02,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-23 16:24:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:24:11,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 16:24:12,845 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-11-23 16:24:12,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 16:24:24,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 55 [2022-11-23 16:24:25,654 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-11-23 16:24:25,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 94 [2022-11-23 16:24:36,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:24:36,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:24:36,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:24:36,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2022-11-23 16:24:41,093 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-23 16:24:41,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 38 [2022-11-23 16:25:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-23 16:25:28,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:26:25,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266542327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:26:25,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:26:25,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 29] total 73 [2022-11-23 16:26:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946042343] [2022-11-23 16:26:25,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:26:25,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-23 16:26:25,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 16:26:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-23 16:26:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=9151, Unknown=82, NotChecked=394, Total=10302 [2022-11-23 16:26:25,907 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 74 states, 71 states have (on average 2.183098591549296) internal successors, (155), 65 states have internal predecessors, (155), 11 states have call successors, (11), 4 states have call predecessors, (11), 6 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2022-11-23 16:26:28,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:26:30,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 16:26:32,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]