./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 50151fd5b174ebc91ead294b24e8609853135da34cf3135980023271fd7c21f6 --- 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 14:11:02,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:11:02,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:11:02,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:11:02,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:11:02,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:11:02,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:11:02,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:11:02,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:11:02,571 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:11:02,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:11:02,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:11:02,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:11:02,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:11:02,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:11:02,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:11:02,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:11:02,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:11:02,590 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:11:02,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:11:02,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:11:02,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:11:02,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:11:02,606 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:11:02,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:11:02,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:11:02,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:11:02,618 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:11:02,619 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:11:02,620 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:11:02,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:11:02,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:11:02,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:11:02,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:11:02,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:11:02,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:11:02,624 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:11:02,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:11:02,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:11:02,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:11:02,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:11:02,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:11:02,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:11:02,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:11:02,673 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:11:02,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:11:02,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:11:02,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:11:02,674 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:11:02,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:11:02,675 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:11:02,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:11:02,676 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:11:02,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:11:02,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:11:02,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:11:02,677 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:11:02,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:11:02,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:11:02,677 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:11:02,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:11:02,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:11:02,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:11:02,679 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:11:02,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:11:02,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:11:02,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:11:02,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:11:02,681 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:11:02,681 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:11:02,681 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:11:02,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:11:02,682 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:11:02,682 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:11:02,682 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:11:02,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:11:02,683 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:11:02,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:02,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:11:02,683 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:11:02,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:11:02,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:11:02,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:11:02,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:11:02,684 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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50151fd5b174ebc91ead294b24e8609853135da34cf3135980023271fd7c21f6 [2022-11-23 14:11:02,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:11:03,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:11:03,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:11:03,023 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:11:03,023 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:11:03,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i [2022-11-23 14:11:06,082 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:11:06,422 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:11:06,422 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i [2022-11-23 14:11:06,442 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/747188d37/e29a71de0e9449d9a83d9c64476499f9/FLAGd4c526384 [2022-11-23 14:11:06,462 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/747188d37/e29a71de0e9449d9a83d9c64476499f9 [2022-11-23 14:11:06,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:11:06,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:11:06,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:06,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:11:06,476 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:11:06,478 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:06" (1/1) ... [2022-11-23 14:11:06,479 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2c745b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:06, skipping insertion in model container [2022-11-23 14:11:06,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:06" (1/1) ... [2022-11-23 14:11:06,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:11:06,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:11:06,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:07,002 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 14:11:07,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@36635d8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:07, skipping insertion in model container [2022-11-23 14:11:07,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:07,004 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:11:07,006 INFO L158 Benchmark]: Toolchain (without parser) took 537.51ms. Allocated memory is still 132.1MB. Free memory was 89.8MB in the beginning and 75.7MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 14:11:07,006 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:11:07,008 INFO L158 Benchmark]: CACSL2BoogieTranslator took 532.91ms. Allocated memory is still 132.1MB. Free memory was 89.8MB in the beginning and 75.7MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 14:11:07,009 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 75.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 532.91ms. Allocated memory is still 132.1MB. Free memory was 89.8MB in the beginning and 75.7MB in the end (delta: 14.1MB). 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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 50151fd5b174ebc91ead294b24e8609853135da34cf3135980023271fd7c21f6 --- 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 14:11:09,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:11:09,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:11:09,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:11:09,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:11:09,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:11:09,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:11:09,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:11:09,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:11:09,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:11:09,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:11:09,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:11:09,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:11:09,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:11:09,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:11:09,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:11:09,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:11:09,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:11:09,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:11:09,234 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:11:09,242 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:11:09,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:11:09,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:11:09,250 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:11:09,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:11:09,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:11:09,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:11:09,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:11:09,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:11:09,265 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:11:09,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:11:09,266 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:11:09,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:11:09,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:11:09,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:11:09,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:11:09,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:11:09,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:11:09,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:11:09,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:11:09,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:11:09,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:11:09,337 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:11:09,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:11:09,338 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:11:09,338 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:11:09,339 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:11:09,339 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:11:09,339 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:11:09,340 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:11:09,340 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:11:09,340 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:11:09,340 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:11:09,341 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:11:09,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:11:09,342 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:11:09,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:11:09,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:11:09,343 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:11:09,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:11:09,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:11:09,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:11:09,344 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:11:09,344 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:11:09,344 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:11:09,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:11:09,345 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:11:09,345 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:11:09,345 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:11:09,346 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:11:09,346 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:11:09,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:11:09,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:11:09,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:11:09,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:09,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:11:09,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:11:09,348 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:11:09,348 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:09,349 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:11:09,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:11:09,349 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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50151fd5b174ebc91ead294b24e8609853135da34cf3135980023271fd7c21f6 [2022-11-23 14:11:09,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:11:09,836 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:11:09,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:11:09,841 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:11:09,841 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:11:09,843 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i [2022-11-23 14:11:12,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:11:13,168 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:11:13,169 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/sv-benchmarks/c/ldv-memsafety/memleaks_test17_1-2.i [2022-11-23 14:11:13,181 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/289fcf959/ff6ad8c6666d432c96281b3ed754a984/FLAG00578a1f9 [2022-11-23 14:11:13,200 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/data/289fcf959/ff6ad8c6666d432c96281b3ed754a984 [2022-11-23 14:11:13,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:11:13,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:11:13,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:13,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:11:13,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:11:13,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:13" (1/1) ... [2022-11-23 14:11:13,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11ddb1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:13, skipping insertion in model container [2022-11-23 14:11:13,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:13" (1/1) ... [2022-11-23 14:11:13,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:11:13,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:11:13,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:13,882 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:11:13,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:11:13,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:14,010 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:11:14,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:14,131 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:11:14,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14 WrapperNode [2022-11-23 14:11:14,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:14,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:14,133 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:11:14,133 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:11:14,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,174 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,208 INFO L138 Inliner]: procedures = 167, calls = 79, calls flagged for inlining = 23, calls inlined = 5, statements flattened = 88 [2022-11-23 14:11:14,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:14,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:11:14,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:11:14,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:11:14,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,246 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,273 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:11:14,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:11:14,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:11:14,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:11:14,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (1/1) ... [2022-11-23 14:11:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:14,324 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:11:14,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:11:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:11:14,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:11:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:11:14,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:11:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:11:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:11:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:11:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:11:14,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:11:14,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:11:14,499 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:11:14,502 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:11:14,918 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:11:14,924 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:11:14,925 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 14:11:14,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:14 BoogieIcfgContainer [2022-11-23 14:11:14,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:11:14,929 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:11:14,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:11:14,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:11:14,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:13" (1/3) ... [2022-11-23 14:11:14,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560c80cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:14, skipping insertion in model container [2022-11-23 14:11:14,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:14" (2/3) ... [2022-11-23 14:11:14,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@560c80cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:14, skipping insertion in model container [2022-11-23 14:11:14,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:14" (3/3) ... [2022-11-23 14:11:14,935 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test17_1-2.i [2022-11-23 14:11:14,954 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:11:14,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-23 14:11:15,002 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:11:15,009 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;@145a05c3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:11:15,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-23 14:11:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 40 states have (on average 1.775) internal successors, (71), 60 states have internal predecessors, (71), 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 14:11:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:11:15,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:15,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:15,022 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:15,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2113718075, now seen corresponding path program 1 times [2022-11-23 14:11:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:15,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75080528] [2022-11-23 14:11:15,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:15,042 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 14:11:15,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:15,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:15,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:11:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:15,257 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 14:11:15,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:15,258 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:15,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75080528] [2022-11-23 14:11:15,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75080528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:15,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:15,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:11:15,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092098744] [2022-11-23 14:11:15,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:15,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:11:15,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:11:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:15,297 INFO L87 Difference]: Start difference. First operand has 64 states, 40 states have (on average 1.775) internal successors, (71), 60 states have internal predecessors, (71), 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 14:11:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:15,430 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2022-11-23 14:11:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:11:15,438 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 14:11:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:15,447 INFO L225 Difference]: With dead ends: 122 [2022-11-23 14:11:15,448 INFO L226 Difference]: Without dead ends: 118 [2022-11-23 14:11:15,450 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 14:11:15,460 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 59 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:15,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 247 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-23 14:11:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 66. [2022-11-23 14:11:15,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.619047619047619) internal successors, (68), 61 states have internal predecessors, (68), 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 14:11:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2022-11-23 14:11:15,522 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 11 [2022-11-23 14:11:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:15,523 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2022-11-23 14:11:15,524 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 14:11:15,525 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2022-11-23 14:11:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:11:15,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:15,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:15,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2113616981, now seen corresponding path program 1 times [2022-11-23 14:11:15,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672801744] [2022-11-23 14:11:15,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:15,739 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 14:11:15,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:15,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:15,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:15,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:15,922 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 14:11:15,994 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 14:11:15,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:15,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672801744] [2022-11-23 14:11:15,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672801744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:15,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:15,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:11:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566712322] [2022-11-23 14:11:15,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:16,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:11:16,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:11:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:16,002 INFO L87 Difference]: Start difference. First operand 66 states and 74 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 14:11:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:16,226 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-11-23 14:11:16,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:11:16,228 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 14:11:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:16,229 INFO L225 Difference]: With dead ends: 90 [2022-11-23 14:11:16,229 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 14:11:16,229 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 14:11:16,230 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 24 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:16,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 172 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 14:11:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2022-11-23 14:11:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 72 states have internal predecessors, (85), 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 14:11:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 91 transitions. [2022-11-23 14:11:16,246 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 91 transitions. Word has length 11 [2022-11-23 14:11:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:16,247 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 91 transitions. [2022-11-23 14:11:16,247 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 14:11:16,248 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 91 transitions. [2022-11-23 14:11:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:11:16,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:16,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:16,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:16,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:16,455 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:16,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2113616982, now seen corresponding path program 1 times [2022-11-23 14:11:16,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:16,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181764870] [2022-11-23 14:11:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:16,457 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 14:11:16,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:16,458 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:16,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:11:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:16,588 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 14:11:16,706 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 14:11:16,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:16,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:16,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181764870] [2022-11-23 14:11:16,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181764870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:16,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:16,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:11:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792359335] [2022-11-23 14:11:16,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:16,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:11:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:11:16,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:11:16,709 INFO L87 Difference]: Start difference. First operand 77 states and 91 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 14:11:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:17,159 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2022-11-23 14:11:17,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:11:17,160 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 14:11:17,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:17,161 INFO L225 Difference]: With dead ends: 114 [2022-11-23 14:11:17,161 INFO L226 Difference]: Without dead ends: 114 [2022-11-23 14:11:17,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:17,162 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 102 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:17,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 365 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:11:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-23 14:11:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2022-11-23 14:11:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 73 states have (on average 1.5753424657534247) internal successors, (115), 92 states have internal predecessors, (115), 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 14:11:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 121 transitions. [2022-11-23 14:11:17,171 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 121 transitions. Word has length 11 [2022-11-23 14:11:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:17,172 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 121 transitions. [2022-11-23 14:11:17,172 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 14:11:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 121 transitions. [2022-11-23 14:11:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:11:17,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:17,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:17,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:17,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,385 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1293745540, now seen corresponding path program 1 times [2022-11-23 14:11:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:17,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314385114] [2022-11-23 14:11:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:17,387 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 14:11:17,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:17,388 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:17,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:11:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:17,482 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 14:11:17,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:17,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314385114] [2022-11-23 14:11:17,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314385114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:17,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:17,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:11:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243538881] [2022-11-23 14:11:17,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:17,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:11:17,485 INFO L87 Difference]: Start difference. First operand 97 states and 121 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 14:11:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:17,625 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2022-11-23 14:11:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:17,626 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 14:11:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:17,628 INFO L225 Difference]: With dead ends: 141 [2022-11-23 14:11:17,628 INFO L226 Difference]: Without dead ends: 139 [2022-11-23 14:11:17,629 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 14:11:17,630 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 47 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:17,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 192 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-23 14:11:17,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 97. [2022-11-23 14:11:17,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 73 states have (on average 1.5616438356164384) internal successors, (114), 92 states have internal predecessors, (114), 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 14:11:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2022-11-23 14:11:17,640 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 11 [2022-11-23 14:11:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:17,641 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2022-11-23 14:11:17,641 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 14:11:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2022-11-23 14:11:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:11:17,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:17,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:17,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:17,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:17,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1293846634, now seen corresponding path program 1 times [2022-11-23 14:11:17,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:17,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667625426] [2022-11-23 14:11:17,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:17,855 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 14:11:17,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:17,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:17,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:11:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:17,993 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 14:11:17,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:17,993 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:17,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667625426] [2022-11-23 14:11:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667625426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:17,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:17,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:11:17,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843759750] [2022-11-23 14:11:17,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:17,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:11:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:11:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:17,996 INFO L87 Difference]: Start difference. First operand 97 states and 120 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 14:11:18,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:18,046 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2022-11-23 14:11:18,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:11:18,047 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 14:11:18,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:18,050 INFO L225 Difference]: With dead ends: 83 [2022-11-23 14:11:18,051 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 14:11:18,051 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 14:11:18,052 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:18,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 259 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:11:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 14:11:18,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-23 14:11:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 77 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 14:11:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-23 14:11:18,065 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 11 [2022-11-23 14:11:18,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:18,066 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-23 14:11:18,069 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 14:11:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-23 14:11:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:11:18,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:18,070 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:18,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:18,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:18,281 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:18,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:18,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1752049815, now seen corresponding path program 1 times [2022-11-23 14:11:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:18,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129852801] [2022-11-23 14:11:18,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:18,282 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 14:11:18,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:18,283 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:18,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:18,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:11:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:18,387 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 14:11:18,580 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 14:11:18,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:19,461 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 14:11:19,461 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129852801] [2022-11-23 14:11:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129852801] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [577973351] [2022-11-23 14:11:19,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:19,463 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:19,465 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:19,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-23 14:11:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:19,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:11:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:19,616 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 14:11:19,693 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 14:11:19,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:20,054 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 14:11:20,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [577973351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:20,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95390589] [2022-11-23 14:11:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:20,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:20,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:20,063 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:20,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:11:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:11:20,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:20,158 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 14:11:20,226 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 14:11:20,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:20,580 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 14:11:20,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95390589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:20,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:11:20,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-11-23 14:11:20,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722982588] [2022-11-23 14:11:20,582 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:20,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:11:20,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:20,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:11:20,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:11:20,584 INFO L87 Difference]: Start difference. First operand 81 states and 96 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 14:11:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:22,412 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2022-11-23 14:11:22,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:11:22,413 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 14:11:22,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:22,414 INFO L225 Difference]: With dead ends: 165 [2022-11-23 14:11:22,414 INFO L226 Difference]: Without dead ends: 165 [2022-11-23 14:11:22,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:11:22,421 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 472 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:22,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 417 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:11:22,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-23 14:11:22,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 90. [2022-11-23 14:11:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 86 states have internal predecessors, (102), 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 14:11:22,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-11-23 14:11:22,444 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 14 [2022-11-23 14:11:22,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:22,446 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-11-23 14:11:22,446 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 14:11:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-11-23 14:11:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:11:22,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:22,449 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 14:11:22,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:22,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:22,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:23,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:23,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1183774854, now seen corresponding path program 1 times [2022-11-23 14:11:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:23,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776389487] [2022-11-23 14:11:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:23,052 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 14:11:23,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:23,054 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:23,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:23,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:23,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:23,224 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 14:11:23,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:23,338 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 14:11:23,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:23,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776389487] [2022-11-23 14:11:23,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776389487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:23,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [677376004] [2022-11-23 14:11:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:23,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:23,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:23,343 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:23,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-23 14:11:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:23,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:23,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:23,565 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 14:11:23,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:23,603 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 14:11:23,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [677376004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:23,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862874053] [2022-11-23 14:11:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:23,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:23,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:23,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:11:23,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:11:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:23,717 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 14:11:23,834 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 14:11:23,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:23,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862874053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:23,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-23 14:11:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6, 6] total 14 [2022-11-23 14:11:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107272150] [2022-11-23 14:11:23,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:23,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:11:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:11:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:11:23,837 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 14:11:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:24,056 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2022-11-23 14:11:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:11:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 14:11:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:24,058 INFO L225 Difference]: With dead ends: 100 [2022-11-23 14:11:24,058 INFO L226 Difference]: Without dead ends: 100 [2022-11-23 14:11:24,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:11:24,059 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 33 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:24,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 198 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:11:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-23 14:11:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2022-11-23 14:11:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 68 states have (on average 1.5294117647058822) internal successors, (104), 87 states have internal predecessors, (104), 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 14:11:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2022-11-23 14:11:24,065 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 22 [2022-11-23 14:11:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2022-11-23 14:11:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 14:11:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2022-11-23 14:11:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:11:24,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:24,075 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 14:11:24,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:24,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 14:11:24,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:24,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:24,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1183774855, now seen corresponding path program 1 times [2022-11-23 14:11:24,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935346578] [2022-11-23 14:11:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:24,680 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 14:11:24,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:24,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:24,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (13)] Waiting until timeout for monitored process [2022-11-23 14:11:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:24,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:24,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:24,859 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 14:11:24,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:24,972 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 14:11:24,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935346578] [2022-11-23 14:11:24,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935346578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:24,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1944723566] [2022-11-23 14:11:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:24,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:24,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:24,975 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:24,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-23 14:11:25,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:25,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:25,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:25,172 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 14:11:25,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:25,213 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 14:11:25,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1944723566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55877987] [2022-11-23 14:11:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:25,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:25,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:25,215 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:25,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:11:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:25,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:11:25,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:25,384 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 14:11:25,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55877987] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:25,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-23 14:11:25,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6, 6, 6] total 11 [2022-11-23 14:11:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346626146] [2022-11-23 14:11:25,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:25,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:11:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:11:25,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:11:25,387 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand has 4 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 14:11:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:25,457 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2022-11-23 14:11:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:11:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 14:11:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:25,459 INFO L225 Difference]: With dead ends: 120 [2022-11-23 14:11:25,459 INFO L226 Difference]: Without dead ends: 120 [2022-11-23 14:11:25,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:25,461 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 144 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:25,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:25,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-23 14:11:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 75. [2022-11-23 14:11:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.5) internal successors, (78), 71 states have internal predecessors, (78), 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 14:11:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-11-23 14:11:25,474 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 22 [2022-11-23 14:11:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:25,475 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-11-23 14:11:25,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 14:11:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-11-23 14:11:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:11:25,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:25,476 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:25,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:25,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:25,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (13)] Ended with exit code 0 [2022-11-23 14:11:26,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:26,080 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:26,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:26,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1595807082, now seen corresponding path program 2 times [2022-11-23 14:11:26,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:26,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935285205] [2022-11-23 14:11:26,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:26,081 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 14:11:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:26,082 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:26,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (16)] Waiting until timeout for monitored process [2022-11-23 14:11:26,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:11:26,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:26,204 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 14:11:26,644 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 14:11:26,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:28,567 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 14:11:28,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:28,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935285205] [2022-11-23 14:11:28,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935285205] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:28,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1871717281] [2022-11-23 14:11:28,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:28,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:28,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:28,571 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:28,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-23 14:11:28,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:28,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:11:28,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:28,770 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 14:11:29,233 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 14:11:29,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:35,227 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 14:11:35,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1871717281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:35,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087032050] [2022-11-23 14:11:35,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:11:35,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:35,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:35,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:11:35,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:11:35,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:11:35,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:35,348 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 14:11:35,514 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 14:11:35,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:38,831 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 14:11:38,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087032050] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:38,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:11:38,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11, 11, 11, 12] total 47 [2022-11-23 14:11:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361654055] [2022-11-23 14:11:38,833 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:38,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 14:11:38,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 14:11:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1903, Unknown=2, NotChecked=0, Total=2256 [2022-11-23 14:11:38,835 INFO L87 Difference]: Start difference. First operand 75 states and 83 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 14:11:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:46,991 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-11-23 14:11:46,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:11:46,991 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 14:11:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:46,992 INFO L225 Difference]: With dead ends: 111 [2022-11-23 14:11:46,992 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 14:11:46,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=675, Invalid=3105, Unknown=2, NotChecked=0, Total=3782 [2022-11-23 14:11:46,995 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 545 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:46,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 1026 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-23 14:11:46,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 14:11:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2022-11-23 14:11:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 89 states have internal predecessors, (99), 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 14:11:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2022-11-23 14:11:47,002 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 23 [2022-11-23 14:11:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:47,002 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2022-11-23 14:11:47,003 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 14:11:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2022-11-23 14:11:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:11:47,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:47,004 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 14:11:47,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-23 14:11:47,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:47,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:47,617 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:47,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:47,618 INFO L85 PathProgramCache]: Analyzing trace with hash -846552599, now seen corresponding path program 1 times [2022-11-23 14:11:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:47,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420430501] [2022-11-23 14:11:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:47,619 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 14:11:47,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:47,624 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:47,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (19)] Waiting until timeout for monitored process [2022-11-23 14:11:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:11:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:47,888 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 14:11:47,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:48,199 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 14:11:48,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:11:48,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420430501] [2022-11-23 14:11:48,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420430501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [118242188] [2022-11-23 14:11:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:11:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:11:48,207 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:11:48,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-23 14:11:48,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:48,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:11:48,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:48,484 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 14:11:48,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:48,561 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 14:11:48,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [118242188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:48,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829064658] [2022-11-23 14:11:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:48,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:48,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 14:11:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:11:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:48,740 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 14:11:49,257 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 14:11:49,269 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 14:11:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:50,895 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 14:11:50,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829064658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:50,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:11:50,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 14, 13] total 34 [2022-11-23 14:11:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390379295] [2022-11-23 14:11:50,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 14:11:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:11:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 14:11:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:11:50,898 INFO L87 Difference]: Start difference. First operand 93 states and 104 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 14:11:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:54,778 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2022-11-23 14:11:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:11:54,780 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 14:11:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:54,782 INFO L225 Difference]: With dead ends: 149 [2022-11-23 14:11:54,782 INFO L226 Difference]: Without dead ends: 149 [2022-11-23 14:11:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2022-11-23 14:11:54,784 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 515 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:54,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 766 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-23 14:11:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-23 14:11:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 98. [2022-11-23 14:11:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 94 states have internal predecessors, (101), 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 14:11:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-11-23 14:11:54,789 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 35 [2022-11-23 14:11:54,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:54,790 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-11-23 14:11:54,790 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 14:11:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-11-23 14:11:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:11:54,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:54,795 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:54,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:55,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:55,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:55,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:55,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:11:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1755014154, now seen corresponding path program 3 times [2022-11-23 14:11:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:11:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768099839] [2022-11-23 14:11:55,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:11:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:11:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:11:55,406 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:11:55,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (22)] Waiting until timeout for monitored process [2022-11-23 14:11:55,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:11:55,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:55,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:11:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:55,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:11:56,500 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 14:11:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:00,514 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 14:12:00,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768099839] [2022-11-23 14:12:00,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768099839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:00,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1725338057] [2022-11-23 14:12:00,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:00,515 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:00,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:00,516 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:00,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 14:12:00,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:12:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 14:12:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:00,989 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 14:12:01,395 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 14:12:01,495 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 14:12:01,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:14,682 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 14:12:14,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1725338057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:14,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156625637] [2022-11-23 14:12:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:14,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:14,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:14,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:14,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 14:12:17,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:12:17,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:17,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 14:12:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:17,679 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 14:12:18,098 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 14:12:18,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:35,971 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 14:12:35,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156625637] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:35,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:35,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 19, 24, 18, 21] total 76 [2022-11-23 14:12:35,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528343114] [2022-11-23 14:12:35,972 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:35,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-23 14:12:35,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:35,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-23 14:12:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=4905, Unknown=0, NotChecked=0, Total=5700 [2022-11-23 14:12:35,976 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 76 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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 14:12:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:49,279 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-11-23 14:12:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:12:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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 14:12:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:49,281 INFO L225 Difference]: With dead ends: 94 [2022-11-23 14:12:49,281 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 14:12:49,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=842, Invalid=5638, Unknown=0, NotChecked=0, Total=6480 [2022-11-23 14:12:49,283 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1115 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1118 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:49,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1118 Valid, 908 Invalid, 1469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-23 14:12:49,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 14:12:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-11-23 14:12:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 69 states have (on average 1.318840579710145) internal successors, (91), 87 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 14:12:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-11-23 14:12:49,288 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 41 [2022-11-23 14:12:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:49,288 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-11-23 14:12:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 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 14:12:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-11-23 14:12:49,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:12:49,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:49,290 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 14:12:49,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-23 14:12:49,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:49,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:49,896 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:12:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1745592900, now seen corresponding path program 2 times [2022-11-23 14:12:49,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739565573] [2022-11-23 14:12:49,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:12:49,897 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 14:12:49,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:49,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:12:49,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (25)] Waiting until timeout for monitored process [2022-11-23 14:12:50,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:12:50,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:50,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:50,097 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 14:12:50,102 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 14:12:50,500 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_570 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_570) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 14:12:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:50,521 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 14:12:50,531 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:50,532 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 14:12:50,582 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 14:12:50,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:53,190 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739565573] [2022-11-23 14:12:53,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739565573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:53,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1314507484] [2022-11-23 14:12:53,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:12:53,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:53,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:53,199 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:53,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 14:12:53,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:12:53,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:53,611 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 14:12:53,618 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 14:12:53,987 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_640 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_640) |c_#length|)))) is different from true [2022-11-23 14:12:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:54,011 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 14:12:54,028 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:54,029 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 14:12:54,053 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 14:12:54,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:56,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1314507484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:56,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251420111] [2022-11-23 14:12:56,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:12:56,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:56,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:56,784 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:56,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 14:12:56,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:12:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:56,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:56,970 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 14:12:56,984 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 14:12:57,331 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_710 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_710) |c_#length|)))) is different from true [2022-11-23 14:12:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:57,351 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 14:12:57,361 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:57,361 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 14:12:57,384 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 14:12:57,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:59,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251420111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:59,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:59,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-11-23 14:12:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892761183] [2022-11-23 14:12:59,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:12:59,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:59,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:12:59,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=109, Unknown=4, NotChecked=66, Total=210 [2022-11-23 14:12:59,640 INFO L87 Difference]: Start difference. First operand 91 states and 96 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 14:13:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:00,937 INFO L93 Difference]: Finished difference Result 225 states and 245 transitions. [2022-11-23 14:13:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:13:00,937 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 14:13:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:00,939 INFO L225 Difference]: With dead ends: 225 [2022-11-23 14:13:00,940 INFO L226 Difference]: Without dead ends: 225 [2022-11-23 14:13:00,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=71, Invalid=279, Unknown=4, NotChecked=108, Total=462 [2022-11-23 14:13:00,941 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 243 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:00,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 478 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 503 Invalid, 0 Unknown, 507 Unchecked, 1.0s Time] [2022-11-23 14:13:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-23 14:13:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 126. [2022-11-23 14:13:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.4215686274509804) internal successors, (145), 119 states have internal predecessors, (145), 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 14:13:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 156 transitions. [2022-11-23 14:13:00,947 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 156 transitions. Word has length 50 [2022-11-23 14:13:00,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:00,947 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 156 transitions. [2022-11-23 14:13:00,948 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 14:13:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 156 transitions. [2022-11-23 14:13:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:13:00,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:00,949 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 14:13:00,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (25)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:01,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:01,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:01,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:01,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1745592901, now seen corresponding path program 1 times [2022-11-23 14:13:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:01,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477026336] [2022-11-23 14:13:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:01,557 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 14:13:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:01,558 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:01,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (28)] Waiting until timeout for monitored process [2022-11-23 14:13:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:01,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:13:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:01,750 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 14:13:01,882 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 14:13:01,903 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:01,903 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 14:13:01,926 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 14:13:01,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:02,169 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 14:13:02,169 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:02,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477026336] [2022-11-23 14:13:02,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477026336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:02,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398247456] [2022-11-23 14:13:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:02,169 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:02,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:02,171 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:02,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-23 14:13:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:13:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:02,532 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 14:13:02,654 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:02,654 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 14:13:02,675 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 14:13:02,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:02,900 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 14:13:02,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [398247456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:02,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41156225] [2022-11-23 14:13:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:02,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:02,903 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:02,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 14:13:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:03,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:13:03,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:03,095 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 14:13:03,190 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_915 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_915) |c_#valid|)))) is different from true [2022-11-23 14:13:03,222 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,222 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 14:13:03,231 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 14:13:03,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:03,473 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 14:13:03,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41156225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:03,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:03,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 9 [2022-11-23 14:13:03,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982082054] [2022-11-23 14:13:03,474 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:03,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:13:03,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:13:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=44, Unknown=2, NotChecked=26, Total=90 [2022-11-23 14:13:03,476 INFO L87 Difference]: Start difference. First operand 126 states and 156 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:13:05,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:05,856 INFO L93 Difference]: Finished difference Result 172 states and 206 transitions. [2022-11-23 14:13:05,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:13:05,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 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 14:13:05,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:05,863 INFO L225 Difference]: With dead ends: 172 [2022-11-23 14:13:05,863 INFO L226 Difference]: Without dead ends: 172 [2022-11-23 14:13:05,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 276 SyntacticMatches, 10 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=26, Invalid=70, Unknown=2, NotChecked=34, Total=132 [2022-11-23 14:13:05,865 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 101 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:05,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 208 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 188 Unchecked, 0.3s Time] [2022-11-23 14:13:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-23 14:13:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 118. [2022-11-23 14:13:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 96 states have (on average 1.3229166666666667) internal successors, (127), 111 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 14:13:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 138 transitions. [2022-11-23 14:13:05,873 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 138 transitions. Word has length 50 [2022-11-23 14:13:05,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:05,875 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 138 transitions. [2022-11-23 14:13:05,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:13:05,875 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 138 transitions. [2022-11-23 14:13:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 14:13:05,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:05,881 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 14:13:05,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:06,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (28)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:06,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:06,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:06,489 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:06,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:06,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1817385993, now seen corresponding path program 1 times [2022-11-23 14:13:06,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:06,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652648126] [2022-11-23 14:13:06,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:06,490 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 14:13:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:06,491 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:06,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:06,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:06,704 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 14:13:06,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:06,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:06,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652648126] [2022-11-23 14:13:06,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652648126] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:06,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:06,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:06,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003941736] [2022-11-23 14:13:06,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:06,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:06,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:06,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:06,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:06,706 INFO L87 Difference]: Start difference. First operand 118 states and 138 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 14:13:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:06,762 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2022-11-23 14:13:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:13:06,765 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 14:13:06,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:06,766 INFO L225 Difference]: With dead ends: 155 [2022-11-23 14:13:06,766 INFO L226 Difference]: Without dead ends: 155 [2022-11-23 14:13:06,766 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 14:13:06,767 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:06,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 246 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:13:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-23 14:13:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2022-11-23 14:13:06,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 112 states have internal predecessors, (128), 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 14:13:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2022-11-23 14:13:06,773 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 52 [2022-11-23 14:13:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:06,773 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2022-11-23 14:13:06,773 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 14:13:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2022-11-23 14:13:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-23 14:13:06,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:06,775 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 14:13:06,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:06,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:06,988 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:06,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:06,989 INFO L85 PathProgramCache]: Analyzing trace with hash -734770968, now seen corresponding path program 1 times [2022-11-23 14:13:06,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:06,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569574889] [2022-11-23 14:13:06,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:06,989 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 14:13:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:06,990 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:06,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:07,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:13:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:07,238 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 14:13:07,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:07,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569574889] [2022-11-23 14:13:07,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569574889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:07,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:07,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:13:07,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664026932] [2022-11-23 14:13:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:07,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:13:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:07,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:13:07,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:13:07,241 INFO L87 Difference]: Start difference. First operand 120 states and 139 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 14:13:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:07,329 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2022-11-23 14:13:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:13:07,330 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 14:13:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:07,331 INFO L225 Difference]: With dead ends: 152 [2022-11-23 14:13:07,331 INFO L226 Difference]: Without dead ends: 152 [2022-11-23 14:13:07,331 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 14:13:07,332 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 51 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 192 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 14:13:07,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 192 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:13:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-23 14:13:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-11-23 14:13:07,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 100 states have (on average 1.3) internal successors, (130), 114 states have internal predecessors, (130), 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 14:13:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2022-11-23 14:13:07,337 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 52 [2022-11-23 14:13:07,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:07,337 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2022-11-23 14:13:07,337 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 14:13:07,337 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2022-11-23 14:13:07,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:13:07,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:07,338 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] [2022-11-23 14:13:07,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:07,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:07,538 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:07,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:07,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1885083517, now seen corresponding path program 1 times [2022-11-23 14:13:07,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:07,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1147501941] [2022-11-23 14:13:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:07,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:07,540 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:07,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (33)] Waiting until timeout for monitored process [2022-11-23 14:13:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:07,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:13:07,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:07,721 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 14:13:07,869 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 14:13:07,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:08,072 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 14:13:08,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:08,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1147501941] [2022-11-23 14:13:08,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1147501941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:08,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1047270427] [2022-11-23 14:13:08,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:08,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:08,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:08,075 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:08,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-23 14:13:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:08,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:13:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:08,428 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 14:13:08,538 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 14:13:08,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:08,737 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 14:13:08,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1047270427] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:08,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948871467] [2022-11-23 14:13:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:08,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:08,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:08,739 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:08,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 14:13:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:13:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:08,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:09,059 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 14:13:09,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:09,230 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 14:13:09,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948871467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:09,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:09,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2022-11-23 14:13:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733892732] [2022-11-23 14:13:09,231 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:09,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:13:09,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:13:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:13:09,233 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:13:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:09,595 INFO L93 Difference]: Finished difference Result 140 states and 157 transitions. [2022-11-23 14:13:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:13:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2022-11-23 14:13:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:09,597 INFO L225 Difference]: With dead ends: 140 [2022-11-23 14:13:09,597 INFO L226 Difference]: Without dead ends: 140 [2022-11-23 14:13:09,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:13:09,598 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:09,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 251 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:13:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-23 14:13:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-11-23 14:13:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 101 states have (on average 1.306930693069307) internal successors, (132), 115 states have internal predecessors, (132), 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 14:13:09,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2022-11-23 14:13:09,602 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 55 [2022-11-23 14:13:09,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:09,607 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2022-11-23 14:13:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:13:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2022-11-23 14:13:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:13:09,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:09,609 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] [2022-11-23 14:13:09,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:09,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:10,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (33)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:10,210 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1885083518, now seen corresponding path program 1 times [2022-11-23 14:13:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:10,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728140017] [2022-11-23 14:13:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:10,211 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 14:13:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:10,212 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:10,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (36)] Waiting until timeout for monitored process [2022-11-23 14:13:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:10,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:13:10,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:10,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:13:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:10,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:12,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728140017] [2022-11-23 14:13:12,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728140017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:12,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727213542] [2022-11-23 14:13:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:12,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:12,081 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:12,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-23 14:13:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:12,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:13:12,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:12,461 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 14:13:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:12,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:14,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727213542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:14,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097118871] [2022-11-23 14:13:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:14,429 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:14,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 14:13:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:13:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:14,643 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 14:13:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:14,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-23 14:13:16,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097118871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:16,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:16,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2022-11-23 14:13:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864715119] [2022-11-23 14:13:16,471 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:16,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:13:16,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:16,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:13:16,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:13:16,472 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 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 14:13:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:18,332 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-11-23 14:13:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:13:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 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 55 [2022-11-23 14:13:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:18,334 INFO L225 Difference]: With dead ends: 193 [2022-11-23 14:13:18,335 INFO L226 Difference]: Without dead ends: 193 [2022-11-23 14:13:18,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 306 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:13:18,336 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 293 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:18,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 630 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:13:18,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-23 14:13:18,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2022-11-23 14:13:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 127 states have (on average 1.4015748031496063) internal successors, (178), 141 states have internal predecessors, (178), 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 14:13:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 189 transitions. [2022-11-23 14:13:18,342 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 189 transitions. Word has length 55 [2022-11-23 14:13:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:18,342 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 189 transitions. [2022-11-23 14:13:18,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 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 14:13:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 189 transitions. [2022-11-23 14:13:18,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:13:18,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:18,344 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, 1] [2022-11-23 14:13:18,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:18,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:18,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (36)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:18,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:18,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 992549453, now seen corresponding path program 1 times [2022-11-23 14:13:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415808582] [2022-11-23 14:13:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:18,953 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 14:13:18,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:18,954 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:18,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (39)] Waiting until timeout for monitored process [2022-11-23 14:13:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:13:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:19,338 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 14:13:19,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:19,519 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 14:13:19,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415808582] [2022-11-23 14:13:19,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415808582] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:19,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1239430830] [2022-11-23 14:13:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:19,523 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:19,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-23 14:13:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:13:19,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:20,019 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 14:13:20,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:20,121 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 14:13:20,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1239430830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:20,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085932669] [2022-11-23 14:13:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:20,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:20,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:20,123 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:20,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 14:13:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:20,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:13:20,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:20,439 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 14:13:20,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:20,556 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 14:13:20,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085932669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:20,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:20,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-11-23 14:13:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377733263] [2022-11-23 14:13:20,557 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:20,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:13:20,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:13:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:13:20,558 INFO L87 Difference]: Start difference. First operand 149 states and 189 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:13:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:20,798 INFO L93 Difference]: Finished difference Result 422 states and 555 transitions. [2022-11-23 14:13:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:13:20,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-11-23 14:13:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:20,800 INFO L225 Difference]: With dead ends: 422 [2022-11-23 14:13:20,801 INFO L226 Difference]: Without dead ends: 422 [2022-11-23 14:13:20,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:13:20,801 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 464 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:20,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 285 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:13:20,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-23 14:13:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 181. [2022-11-23 14:13:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 155 states have (on average 1.3806451612903226) internal successors, (214), 167 states have internal predecessors, (214), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-23 14:13:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 237 transitions. [2022-11-23 14:13:20,812 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 237 transitions. Word has length 56 [2022-11-23 14:13:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:20,813 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 237 transitions. [2022-11-23 14:13:20,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:13:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 237 transitions. [2022-11-23 14:13:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:13:20,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:20,814 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] [2022-11-23 14:13:20,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:21,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:21,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 (39)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:21,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:21,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-23 14:13:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:21,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1691953052, now seen corresponding path program 1 times [2022-11-23 14:13:21,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:21,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065074307] [2022-11-23 14:13:21,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:21,425 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 14:13:21,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:21,426 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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 14:13:21,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9529d77c-44cf-4e21-b1ae-65cc799ad62a/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)] Waiting until timeout for monitored process [2022-11-23 14:13:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 14:13:21,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:21,702 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 14:13:21,769 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:21,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:21,828 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:21,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:21,882 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:21,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:21,939 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:21,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:22,003 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:22,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:22,069 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:22,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:22,133 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:22,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:22,203 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 14:13:22,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2022-11-23 14:13:22,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:13:22,463 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 14:13:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 4 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:13:22,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:29,998 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 86 treesize of output 84