./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:05,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:05,909 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 05:15:05,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:05,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:05,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:05,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:05,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:05,946 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:05,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:05,947 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:05,948 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:05,948 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:05,949 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:15:05,949 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:05,957 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:05,958 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:15:05,958 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:15:05,959 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:05,960 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:15:05,960 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:15:05,961 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:15:05,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:15:05,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:15:05,962 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:05,963 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:15:05,963 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:05,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:15:05,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:05,965 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:15:05,965 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:15:05,966 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:15:05,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:05,966 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:15:05,966 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:15:05,967 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:15:05,967 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:05,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:05,968 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:05,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:05,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:05,969 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:05,969 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:15:05,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:15:05,970 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:05,970 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:05,970 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2023-11-19 05:15:06,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:06,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:06,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:06,271 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:06,272 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:06,274 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2023-11-19 05:15:09,525 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:15:09,882 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:15:09,883 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2023-11-19 05:15:09,918 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/8be072c39/c649cb47a8fb481a99ec24eba8318e66/FLAG90548d955 [2023-11-19 05:15:09,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/8be072c39/c649cb47a8fb481a99ec24eba8318e66 [2023-11-19 05:15:09,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:15:09,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:15:09,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:09,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:15:09,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:15:09,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:09" (1/1) ... [2023-11-19 05:15:09,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7279db01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:09, skipping insertion in model container [2023-11-19 05:15:09,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:09" (1/1) ... [2023-11-19 05:15:10,016 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:10,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:10,570 ERROR L324 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) [2023-11-19 05:15:10,571 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6098947e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:10, skipping insertion in model container [2023-11-19 05:15:10,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:10,572 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 05:15:10,574 INFO L158 Benchmark]: Toolchain (without parser) took 626.18ms. Allocated memory is still 130.0MB. Free memory was 81.3MB in the beginning and 66.5MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-19 05:15:10,574 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:15:10,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 620.41ms. Allocated memory is still 130.0MB. Free memory was 80.9MB in the beginning and 66.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-19 05:15:10,577 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory is still 98.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 620.41ms. Allocated memory is still 130.0MB. Free memory was 80.9MB in the beginning and 66.5MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. 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_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:15:13,019 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:15:13,100 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-19 05:15:13,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:15:13,124 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:15:13,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:15:13,182 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:15:13,182 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:15:13,184 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:15:13,189 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:15:13,190 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:15:13,190 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:15:13,191 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:15:13,193 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:15:13,193 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:15:13,194 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:15:13,197 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:15:13,198 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:15:13,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:15:13,199 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:15:13,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:15:13,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:15:13,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:15:13,201 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:15:13,202 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:15:13,202 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:15:13,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:15:13,203 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:15:13,204 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 05:15:13,204 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 05:15:13,206 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:15:13,207 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:15:13,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:15:13,207 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:15:13,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 05:15:13,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:15:13,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:13,210 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:15:13,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:15:13,210 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 05:15:13,211 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:13,211 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:15:13,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:15:13,212 INFO L153 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_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e94333448b9ec2a5ffed0adee00d968fb025c54e55196475ef51117fcee9fc3a [2023-11-19 05:15:13,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:15:13,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:15:13,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:15:13,717 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:15:13,718 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:15:13,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2023-11-19 05:15:16,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:15:17,276 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:15:17,277 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/sv-benchmarks/c/ldv-memsafety/memleaks_test15-1.i [2023-11-19 05:15:17,297 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/d9a72b7a9/4b5d54be898549c48e715aa36ee7ae2c/FLAGa578ec874 [2023-11-19 05:15:17,479 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/data/d9a72b7a9/4b5d54be898549c48e715aa36ee7ae2c [2023-11-19 05:15:17,481 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:15:17,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:15:17,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:17,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:15:17,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:15:17,498 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:17" (1/1) ... [2023-11-19 05:15:17,499 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434b2bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:17, skipping insertion in model container [2023-11-19 05:15:17,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:15:17" (1/1) ... [2023-11-19 05:15:17,554 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:18,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:18,125 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 05:15:18,141 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:15:18,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:18,257 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:15:18,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:15:18,422 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 05:15:18,430 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:15:18,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18 WrapperNode [2023-11-19 05:15:18,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:15:18,432 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:18,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:15:18,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:15:18,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,507 INFO L138 Inliner]: procedures = 176, calls = 103, calls flagged for inlining = 31, calls inlined = 14, statements flattened = 180 [2023-11-19 05:15:18,508 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:15:18,508 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:15:18,509 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:15:18,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:15:18,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,561 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:15:18,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:15:18,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:15:18,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:15:18,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (1/1) ... [2023-11-19 05:15:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:15:18,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:18,615 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:15:18,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:15:18,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-11-19 05:15:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:15:18,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:15:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:15:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:15:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-11-19 05:15:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 05:15:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:15:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:15:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 05:15:18,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 05:15:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:15:18,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:15:18,924 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:15:18,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:15:19,708 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:15:19,722 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:15:19,723 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:15:19,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:15:19 BoogieIcfgContainer [2023-11-19 05:15:19,731 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:15:19,736 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:15:19,737 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:15:19,740 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:15:19,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:15:17" (1/3) ... [2023-11-19 05:15:19,743 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ad9196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:15:19, skipping insertion in model container [2023-11-19 05:15:19,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:15:18" (2/3) ... [2023-11-19 05:15:19,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ad9196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:15:19, skipping insertion in model container [2023-11-19 05:15:19,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:15:19" (3/3) ... [2023-11-19 05:15:19,748 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test15-1.i [2023-11-19 05:15:19,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:15:19,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2023-11-19 05:15:19,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:15:19,844 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;@15cd9106, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:15:19,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-11-19 05:15:19,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 74 states have (on average 1.8108108108108107) internal successors, (134), 124 states have internal predecessors, (134), 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) [2023-11-19 05:15:19,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:15:19,857 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:19,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:19,859 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:19,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1888803226, now seen corresponding path program 1 times [2023-11-19 05:15:19,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:19,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128131365] [2023-11-19 05:15:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:19,881 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 [2023-11-19 05:15:19,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:19,886 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:19,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:20,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:15:20,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:15:20,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:20,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128131365] [2023-11-19 05:15:20,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128131365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:20,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:20,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:15:20,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002021737] [2023-11-19 05:15:20,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:15:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:15:20,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:15:20,169 INFO L87 Difference]: Start difference. First operand has 130 states, 74 states have (on average 1.8108108108108107) internal successors, (134), 124 states have internal predecessors, (134), 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) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2023-11-19 05:15:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:20,302 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2023-11-19 05:15:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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 [2023-11-19 05:15:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:20,314 INFO L225 Difference]: With dead ends: 130 [2023-11-19 05:15:20,314 INFO L226 Difference]: Without dead ends: 128 [2023-11-19 05:15:20,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:20,319 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 125 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:20,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 521 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-19 05:15:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-19 05:15:20,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 73 states have (on average 1.7945205479452055) internal successors, (131), 122 states have internal predecessors, (131), 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) [2023-11-19 05:15:20,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2023-11-19 05:15:20,368 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 11 [2023-11-19 05:15:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:20,369 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2023-11-19 05:15:20,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 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) [2023-11-19 05:15:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2023-11-19 05:15:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 05:15:20,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:20,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:20,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-19 05:15:20,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:20,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:20,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1971915274, now seen corresponding path program 1 times [2023-11-19 05:15:20,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:20,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111556322] [2023-11-19 05:15:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:20,578 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 [2023-11-19 05:15:20,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:20,580 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:20,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:20,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:15:20,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:15:20,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:20,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:20,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111556322] [2023-11-19 05:15:20,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111556322] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:20,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:20,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:15:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569230498] [2023-11-19 05:15:20,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:20,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:15:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:15:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:15:20,759 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-19 05:15:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:20,919 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2023-11-19 05:15:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:15:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2023-11-19 05:15:20,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:20,922 INFO L225 Difference]: With dead ends: 128 [2023-11-19 05:15:20,923 INFO L226 Difference]: Without dead ends: 128 [2023-11-19 05:15:20,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:20,925 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 122 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:20,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 478 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:15:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-19 05:15:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2023-11-19 05:15:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 73 states have (on average 1.7808219178082192) internal successors, (130), 122 states have internal predecessors, (130), 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) [2023-11-19 05:15:20,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2023-11-19 05:15:20,940 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 17 [2023-11-19 05:15:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:20,941 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2023-11-19 05:15:20,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-19 05:15:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2023-11-19 05:15:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:15:20,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:20,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:20,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:21,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:21,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:21,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:21,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1080922302, now seen corresponding path program 1 times [2023-11-19 05:15:21,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:21,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [139476814] [2023-11-19 05:15:21,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:21,148 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 [2023-11-19 05:15:21,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:21,150 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:21,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:21,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:15:21,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:21,338 INFO L378 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 [2023-11-19 05:15:21,459 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#valid| |ldv_zalloc_#t~malloc13#1.base|)) |c_#valid|) (= (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|) (_ bv0 1)))) is different from true [2023-11-19 05:15:21,552 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:21,560 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:21,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:15:23,907 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [139476814] [2023-11-19 05:15:23,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [139476814] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:23,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1529397845] [2023-11-19 05:15:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:23,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:23,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:23,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-19 05:15:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:24,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:15:24,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:24,144 INFO L378 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 [2023-11-19 05:15:24,274 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:24,274 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:24,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:24,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:15:24,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1529397845] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:24,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635903816] [2023-11-19 05:15:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:24,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:24,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:15:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:24,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:15:24,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:24,688 INFO L378 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 [2023-11-19 05:15:24,789 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:24,790 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:24,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:15:25,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635903816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:25,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:15:25,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6, 7, 6] total 9 [2023-11-19 05:15:25,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074047534] [2023-11-19 05:15:25,761 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:25,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 05:15:25,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:25,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 05:15:25,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=54, Unknown=2, NotChecked=14, Total=90 [2023-11-19 05:15:25,763 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:15:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:26,549 INFO L93 Difference]: Finished difference Result 162 states and 175 transitions. [2023-11-19 05:15:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:15:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-11-19 05:15:26,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:26,551 INFO L225 Difference]: With dead ends: 162 [2023-11-19 05:15:26,552 INFO L226 Difference]: Without dead ends: 162 [2023-11-19 05:15:26,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=32, Invalid=80, Unknown=2, NotChecked=18, Total=132 [2023-11-19 05:15:26,553 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 106 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:26,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 415 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 314 Invalid, 0 Unknown, 172 Unchecked, 0.7s Time] [2023-11-19 05:15:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-11-19 05:15:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 141. [2023-11-19 05:15:26,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.7415730337078652) internal successors, (155), 135 states have internal predecessors, (155), 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) [2023-11-19 05:15:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2023-11-19 05:15:26,567 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 22 [2023-11-19 05:15:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:26,568 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2023-11-19 05:15:26,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 05:15:26,568 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2023-11-19 05:15:26,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:15:26,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:26,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:26,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:26,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:26,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:27,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:27,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:27,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1080922303, now seen corresponding path program 1 times [2023-11-19 05:15:27,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:27,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [284952511] [2023-11-19 05:15:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:27,175 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 [2023-11-19 05:15:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:27,176 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:27,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:27,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 05:15:27,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:27,325 INFO L378 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 [2023-11-19 05:15:27,333 INFO L378 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 [2023-11-19 05:15:27,511 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#length| |ldv_zalloc_#t~malloc13#1.base|))))) is different from true [2023-11-19 05:15:27,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:27,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:27,570 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-19 05:15:27,571 INFO L378 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 [2023-11-19 05:15:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:27,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:27,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [284952511] [2023-11-19 05:15:27,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [284952511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:27,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111650860] [2023-11-19 05:15:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:27,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:27,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:27,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2023-11-19 05:15:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:28,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 05:15:28,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:28,098 INFO L378 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 [2023-11-19 05:15:28,104 INFO L378 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 [2023-11-19 05:15:28,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:28,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:28,290 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-19 05:15:28,290 INFO L378 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 [2023-11-19 05:15:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:28,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:28,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111650860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:28,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240992682] [2023-11-19 05:15:28,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:28,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:28,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:28,476 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:28,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:15:28,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:28,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 05:15:28,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:28,595 INFO L378 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 [2023-11-19 05:15:28,603 INFO L378 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 [2023-11-19 05:15:28,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:28,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:28,767 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-19 05:15:28,767 INFO L378 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 [2023-11-19 05:15:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-19 05:15:28,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240992682] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:30,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:30,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-19 05:15:30,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138389299] [2023-11-19 05:15:30,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:30,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 05:15:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:30,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 05:15:30,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2023-11-19 05:15:30,962 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:15:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:32,194 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2023-11-19 05:15:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:15:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-11-19 05:15:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:32,196 INFO L225 Difference]: With dead ends: 168 [2023-11-19 05:15:32,196 INFO L226 Difference]: Without dead ends: 168 [2023-11-19 05:15:32,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2023-11-19 05:15:32,198 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 149 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:32,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 353 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 392 Invalid, 0 Unknown, 165 Unchecked, 1.0s Time] [2023-11-19 05:15:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-19 05:15:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2023-11-19 05:15:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 89 states have (on average 1.6629213483146068) internal successors, (148), 130 states have internal predecessors, (148), 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) [2023-11-19 05:15:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2023-11-19 05:15:32,209 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 22 [2023-11-19 05:15:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:32,210 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2023-11-19 05:15:32,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 05:15:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2023-11-19 05:15:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 05:15:32,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:32,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:32,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:32,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:32,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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)] Ended with exit code 0 [2023-11-19 05:15:32,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:32,834 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:32,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash -109247454, now seen corresponding path program 1 times [2023-11-19 05:15:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:32,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130288220] [2023-11-19 05:15:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:32,835 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 [2023-11-19 05:15:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:32,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:32,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:32,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:15:32,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:32,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-19 05:15:33,021 INFO L378 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 20 treesize of output 8 [2023-11-19 05:15:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:33,037 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:33,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:33,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130288220] [2023-11-19 05:15:33,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130288220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:33,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:33,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 05:15:33,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213341657] [2023-11-19 05:15:33,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:33,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:15:33,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:33,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:15:33,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:33,040 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:33,297 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2023-11-19 05:15:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:15:33,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2023-11-19 05:15:33,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:33,300 INFO L225 Difference]: With dead ends: 133 [2023-11-19 05:15:33,301 INFO L226 Difference]: Without dead ends: 133 [2023-11-19 05:15:33,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:15:33,302 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 9 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:33,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 703 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:15:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-19 05:15:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-19 05:15:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 86 states have (on average 1.6627906976744187) internal successors, (143), 127 states have internal predecessors, (143), 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) [2023-11-19 05:15:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 151 transitions. [2023-11-19 05:15:33,312 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 151 transitions. Word has length 27 [2023-11-19 05:15:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:33,312 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 151 transitions. [2023-11-19 05:15:33,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:33,313 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 151 transitions. [2023-11-19 05:15:33,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 05:15:33,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:33,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:33,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:33,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:33,517 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:33,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:33,517 INFO L85 PathProgramCache]: Analyzing trace with hash 908221985, now seen corresponding path program 1 times [2023-11-19 05:15:33,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:33,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574506727] [2023-11-19 05:15:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:33,518 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 [2023-11-19 05:15:33,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:33,519 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:33,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-19 05:15:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:33,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:15:33,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:33,669 INFO L378 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 [2023-11-19 05:15:33,728 INFO L378 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 19 treesize of output 1 [2023-11-19 05:15:33,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-11-19 05:15:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:33,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:33,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574506727] [2023-11-19 05:15:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574506727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:15:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206389176] [2023-11-19 05:15:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:15:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:15:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:33,796 INFO L87 Difference]: Start difference. First operand 133 states and 151 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:34,451 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2023-11-19 05:15:34,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:15:34,452 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-19 05:15:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:34,453 INFO L225 Difference]: With dead ends: 132 [2023-11-19 05:15:34,453 INFO L226 Difference]: Without dead ends: 132 [2023-11-19 05:15:34,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:15:34,454 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 8 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:34,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 496 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:15:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-19 05:15:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-19 05:15:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 86 states have (on average 1.6511627906976745) internal successors, (142), 126 states have internal predecessors, (142), 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) [2023-11-19 05:15:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2023-11-19 05:15:34,463 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 28 [2023-11-19 05:15:34,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:34,464 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2023-11-19 05:15:34,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2023-11-19 05:15:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 05:15:34,465 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:34,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:34,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:34,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:34,668 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:34,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:34,669 INFO L85 PathProgramCache]: Analyzing trace with hash 908221986, now seen corresponding path program 1 times [2023-11-19 05:15:34,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:34,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1195797203] [2023-11-19 05:15:34,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:34,670 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 [2023-11-19 05:15:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:34,671 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:34,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-19 05:15:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:34,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 05:15:34,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:34,799 INFO L378 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 [2023-11-19 05:15:34,886 INFO L378 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 13 treesize of output 9 [2023-11-19 05:15:34,898 INFO L378 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 19 treesize of output 1 [2023-11-19 05:15:34,981 INFO L378 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 21 treesize of output 9 [2023-11-19 05:15:35,023 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:35,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:35,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:35,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1195797203] [2023-11-19 05:15:35,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1195797203] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:35,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:35,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:15:35,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085348354] [2023-11-19 05:15:35,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:35,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:15:35,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:35,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:15:35,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:15:35,025 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:35,777 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2023-11-19 05:15:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:15:35,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-11-19 05:15:35,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:35,780 INFO L225 Difference]: With dead ends: 131 [2023-11-19 05:15:35,780 INFO L226 Difference]: Without dead ends: 131 [2023-11-19 05:15:35,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 05:15:35,782 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 6 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:35,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 543 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:15:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-19 05:15:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-19 05:15:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.6395348837209303) internal successors, (141), 125 states have internal predecessors, (141), 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) [2023-11-19 05:15:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2023-11-19 05:15:35,789 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 28 [2023-11-19 05:15:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:35,790 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2023-11-19 05:15:35,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2023-11-19 05:15:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:15:35,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:35,791 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:35,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-19 05:15:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:35,994 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:35,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 922966850, now seen corresponding path program 1 times [2023-11-19 05:15:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:35,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219853288] [2023-11-19 05:15:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:35,995 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 [2023-11-19 05:15:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:35,996 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:35,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:36,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 05:15:36,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:36,156 INFO L378 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 [2023-11-19 05:15:36,238 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#valid| |ldv_zalloc_#t~malloc13#1.base|)) |c_#valid|) (= (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|) (_ bv0 1)))) is different from true [2023-11-19 05:15:36,293 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:36,294 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:36,380 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 05:15:36,380 INFO L378 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 [2023-11-19 05:15:36,425 INFO L378 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 19 treesize of output 1 [2023-11-19 05:15:36,505 INFO L378 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 13 treesize of output 7 [2023-11-19 05:15:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-11-19 05:15:36,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:15:36,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219853288] [2023-11-19 05:15:36,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219853288] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:36,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1098522999] [2023-11-19 05:15:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:36,963 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:36,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:36,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-11-19 05:15:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:37,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 05:15:37,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:37,183 INFO L378 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 [2023-11-19 05:15:37,276 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:37,277 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:37,308 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (= |c_#valid| (store |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base| (_ bv1 1)))) is different from true [2023-11-19 05:15:37,336 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 05:15:37,337 INFO L378 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 [2023-11-19 05:15:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2023-11-19 05:15:37,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 05:15:37,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1098522999] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:37,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313447424] [2023-11-19 05:15:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:37,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:37,830 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:37,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 05:15:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:37,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 05:15:37,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:37,975 INFO L378 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 [2023-11-19 05:15:38,059 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:38,059 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:38,123 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-19 05:15:38,124 INFO L378 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 [2023-11-19 05:15:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2023-11-19 05:15:38,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 05:15:40,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313447424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:40,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:15:40,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 8, 6, 8, 7] total 14 [2023-11-19 05:15:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944255021] [2023-11-19 05:15:40,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:40,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:15:40,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:40,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:15:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=123, Unknown=3, NotChecked=46, Total=210 [2023-11-19 05:15:40,643 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:15:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:43,809 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2023-11-19 05:15:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:15:43,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 30 [2023-11-19 05:15:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:43,811 INFO L225 Difference]: With dead ends: 154 [2023-11-19 05:15:43,811 INFO L226 Difference]: Without dead ends: 154 [2023-11-19 05:15:43,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 142 SyntacticMatches, 19 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=58, Invalid=186, Unknown=4, NotChecked=58, Total=306 [2023-11-19 05:15:43,812 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 91 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:43,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 580 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 441 Invalid, 0 Unknown, 326 Unchecked, 1.0s Time] [2023-11-19 05:15:43,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-19 05:15:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2023-11-19 05:15:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.627906976744186) internal successors, (140), 124 states have internal predecessors, (140), 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) [2023-11-19 05:15:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2023-11-19 05:15:43,818 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 30 [2023-11-19 05:15:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:43,818 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2023-11-19 05:15:43,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 05:15:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2023-11-19 05:15:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 05:15:43,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:43,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:43,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:44,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:44,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:44,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:44,421 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:44,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:44,421 INFO L85 PathProgramCache]: Analyzing trace with hash 922966851, now seen corresponding path program 1 times [2023-11-19 05:15:44,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622696864] [2023-11-19 05:15:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:44,422 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 [2023-11-19 05:15:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:44,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:44,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:44,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:15:44,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:44,589 INFO L378 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 [2023-11-19 05:15:44,601 INFO L378 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 [2023-11-19 05:15:44,780 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (store |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#valid| |ldv_zalloc_#t~malloc13#1.base|)) |c_#valid|) (= (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#length| |ldv_zalloc_#t~malloc13#1.base|))))) is different from true [2023-11-19 05:15:44,862 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:44,863 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:44,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:44,924 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_zalloc_#t~malloc13#1.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |ldv_zalloc_#t~malloc13#1.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |ldv_zalloc_#t~malloc13#1.base| (select |c_#length| |ldv_zalloc_#t~malloc13#1.base|))))) is different from true [2023-11-19 05:15:44,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:44,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:44,977 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-19 05:15:44,977 INFO L378 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 [2023-11-19 05:15:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2023-11-19 05:15:45,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:47,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622696864] [2023-11-19 05:15:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622696864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1492403397] [2023-11-19 05:15:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:47,365 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:47,374 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:47,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-19 05:15:47,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:47,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:15:47,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:47,631 INFO L378 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 [2023-11-19 05:15:47,638 INFO L378 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 [2023-11-19 05:15:47,835 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-19 05:15:47,835 INFO L378 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 21 treesize of output 20 [2023-11-19 05:15:47,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:47,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:47,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:47,961 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-19 05:15:47,961 INFO L378 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 [2023-11-19 05:15:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 9 not checked. [2023-11-19 05:15:48,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:48,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1492403397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864953322] [2023-11-19 05:15:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:48,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:48,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:48,312 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:48,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 05:15:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:48,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 05:15:48,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:48,513 INFO L378 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 [2023-11-19 05:15:48,522 INFO L378 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 [2023-11-19 05:15:48,815 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-19 05:15:48,815 INFO L378 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 [2023-11-19 05:15:48,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:15:49,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 05:15:49,167 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-11-19 05:15:49,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-11-19 05:15:49,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2023-11-19 05:15:49,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:49,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864953322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:49,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:15:49,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 12] total 13 [2023-11-19 05:15:49,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115380384] [2023-11-19 05:15:49,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:15:49,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:15:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=145, Unknown=3, NotChecked=50, Total=240 [2023-11-19 05:15:49,581 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:15:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:51,496 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2023-11-19 05:15:51,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 05:15:51,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2023-11-19 05:15:51,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:51,498 INFO L225 Difference]: With dead ends: 152 [2023-11-19 05:15:51,498 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 05:15:51,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=53, Invalid=192, Unknown=3, NotChecked=58, Total=306 [2023-11-19 05:15:51,500 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:51,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 455 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 322 Unchecked, 1.6s Time] [2023-11-19 05:15:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 05:15:51,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 128. [2023-11-19 05:15:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 86 states have (on average 1.6046511627906976) internal successors, (138), 122 states have internal predecessors, (138), 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) [2023-11-19 05:15:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 146 transitions. [2023-11-19 05:15:51,507 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 146 transitions. Word has length 30 [2023-11-19 05:15:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:51,507 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 146 transitions. [2023-11-19 05:15:51,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-19 05:15:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 146 transitions. [2023-11-19 05:15:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:15:51,509 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:51,509 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:51,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:51,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:51,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:52,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:52,113 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:52,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2087086940, now seen corresponding path program 1 times [2023-11-19 05:15:52,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:52,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311820883] [2023-11-19 05:15:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:52,114 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 [2023-11-19 05:15:52,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:52,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:52,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:52,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 05:15:52,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:52,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:52,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:15:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:52,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311820883] [2023-11-19 05:15:52,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311820883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224508570] [2023-11-19 05:15:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:52,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:52,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:52,918 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:52,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-11-19 05:15:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:53,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 05:15:53,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:53,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:53,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:53,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:15:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224508570] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:53,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533867432] [2023-11-19 05:15:53,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:53,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:15:53,468 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:15:53,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 05:15:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:53,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 05:15:53,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:53,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:53,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:15:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:53,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533867432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:53,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:15:53,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2023-11-19 05:15:53,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956214159] [2023-11-19 05:15:53,845 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:15:53,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:15:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:15:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-19 05:15:53,846 INFO L87 Difference]: Start difference. First operand 128 states and 146 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:15:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:54,890 INFO L93 Difference]: Finished difference Result 179 states and 200 transitions. [2023-11-19 05:15:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:15:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 32 [2023-11-19 05:15:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:54,892 INFO L225 Difference]: With dead ends: 179 [2023-11-19 05:15:54,892 INFO L226 Difference]: Without dead ends: 179 [2023-11-19 05:15:54,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:15:54,894 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 378 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:54,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 832 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:15:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-19 05:15:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 127. [2023-11-19 05:15:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 86 states have (on average 1.5930232558139534) internal successors, (137), 121 states have internal predecessors, (137), 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) [2023-11-19 05:15:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2023-11-19 05:15:54,907 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 32 [2023-11-19 05:15:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:54,907 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2023-11-19 05:15:54,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-19 05:15:54,908 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2023-11-19 05:15:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:15:54,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:54,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:54,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:55,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:55,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:55,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:15:55,515 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:55,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:55,515 INFO L85 PathProgramCache]: Analyzing trace with hash -2087086941, now seen corresponding path program 1 times [2023-11-19 05:15:55,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:55,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1258784924] [2023-11-19 05:15:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:55,516 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 [2023-11-19 05:15:55,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:55,517 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:55,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:55,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:15:55,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:55,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:15:55,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1258784924] [2023-11-19 05:15:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1258784924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:15:55,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:15:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:15:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725049453] [2023-11-19 05:15:55,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:15:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:15:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:15:55,680 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:55,933 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2023-11-19 05:15:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:15:55,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-19 05:15:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:55,935 INFO L225 Difference]: With dead ends: 163 [2023-11-19 05:15:55,936 INFO L226 Difference]: Without dead ends: 163 [2023-11-19 05:15:55,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 05:15:55,936 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 69 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:55,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 229 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:15:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-19 05:15:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 126. [2023-11-19 05:15:55,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 86 states have (on average 1.5813953488372092) internal successors, (136), 120 states have internal predecessors, (136), 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) [2023-11-19 05:15:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 144 transitions. [2023-11-19 05:15:55,948 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 144 transitions. Word has length 32 [2023-11-19 05:15:55,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:55,949 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 144 transitions. [2023-11-19 05:15:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:55,949 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 144 transitions. [2023-11-19 05:15:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 05:15:55,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:55,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:55,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:15:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:56,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 59177540, now seen corresponding path program 1 times [2023-11-19 05:15:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:56,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432615374] [2023-11-19 05:15:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:56,154 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 [2023-11-19 05:15:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:56,155 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:56,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-19 05:15:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:56,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 05:15:56,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:56,448 INFO L378 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 1 [2023-11-19 05:15:56,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-19 05:15:56,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:56,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:15:56,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:56,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432615374] [2023-11-19 05:15:56,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432615374] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 05:15:56,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:15:56,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 14 [2023-11-19 05:15:56,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970993667] [2023-11-19 05:15:56,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:15:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:15:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:15:56,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:15:56,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-19 05:15:56,742 INFO L87 Difference]: Start difference. First operand 126 states and 144 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:15:57,541 INFO L93 Difference]: Finished difference Result 156 states and 177 transitions. [2023-11-19 05:15:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 05:15:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-19 05:15:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:15:57,543 INFO L225 Difference]: With dead ends: 156 [2023-11-19 05:15:57,543 INFO L226 Difference]: Without dead ends: 156 [2023-11-19 05:15:57,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-19 05:15:57,545 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 89 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:15:57,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 426 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:15:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-19 05:15:57,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 125. [2023-11-19 05:15:57,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 86 states have (on average 1.569767441860465) internal successors, (135), 119 states have internal predecessors, (135), 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) [2023-11-19 05:15:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2023-11-19 05:15:57,550 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 34 [2023-11-19 05:15:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:15:57,550 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2023-11-19 05:15:57,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 05:15:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2023-11-19 05:15:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 05:15:57,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:15:57,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:15:57,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-11-19 05:15:57,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:15:57,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:15:57,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:15:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 59177541, now seen corresponding path program 1 times [2023-11-19 05:15:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:15:57,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67660151] [2023-11-19 05:15:57,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:57,753 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 [2023-11-19 05:15:57,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:15:57,755 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:15:57,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-19 05:15:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:57,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:15:57,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:58,126 INFO L378 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 1 [2023-11-19 05:15:58,137 INFO L378 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 11 treesize of output 7 [2023-11-19 05:15:58,237 INFO L378 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 17 treesize of output 9 [2023-11-19 05:15:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:58,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:58,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:15:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:59,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:15:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67660151] [2023-11-19 05:15:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67660151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:15:59,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1138765679] [2023-11-19 05:15:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:15:59,406 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:15:59,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:15:59,407 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:15:59,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-11-19 05:15:59,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:15:59,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-19 05:15:59,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:15:59,786 INFO L378 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 11 treesize of output 7 [2023-11-19 05:15:59,794 INFO L378 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 1 [2023-11-19 05:15:59,818 INFO L378 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 17 treesize of output 9 [2023-11-19 05:15:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:15:59,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:15:59,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:16:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:16:00,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1138765679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:00,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755086641] [2023-11-19 05:16:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:00,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:16:00,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:16:00,110 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:16:00,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-19 05:16:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:00,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 05:16:00,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:00,399 INFO L378 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 1 [2023-11-19 05:16:00,404 INFO L378 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 11 treesize of output 7 [2023-11-19 05:16:00,433 INFO L378 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 17 treesize of output 9 [2023-11-19 05:16:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:16:00,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:16:00,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2023-11-19 05:16:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 05:16:00,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755086641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:16:00,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:16:00,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 12, 10] total 21 [2023-11-19 05:16:00,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818139766] [2023-11-19 05:16:00,687 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:16:00,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 05:16:00,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:16:00,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 05:16:00,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2023-11-19 05:16:00,689 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 05:16:02,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:16:02,958 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2023-11-19 05:16:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 05:16:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2023-11-19 05:16:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:16:02,960 INFO L225 Difference]: With dead ends: 159 [2023-11-19 05:16:02,960 INFO L226 Difference]: Without dead ends: 159 [2023-11-19 05:16:02,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2023-11-19 05:16:02,961 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 351 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 05:16:02,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 1041 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 05:16:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-19 05:16:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 124. [2023-11-19 05:16:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 86 states have (on average 1.558139534883721) internal successors, (134), 118 states have internal predecessors, (134), 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) [2023-11-19 05:16:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2023-11-19 05:16:02,967 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 34 [2023-11-19 05:16:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:16:02,968 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2023-11-19 05:16:02,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.619047619047619) internal successors, (55), 19 states have internal predecessors, (55), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-19 05:16:02,968 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2023-11-19 05:16:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 05:16:02,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:16:02,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:16:02,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:03,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2023-11-19 05:16:03,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-19 05:16:03,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:16:03,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-11-19 05:16:03,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:16:03,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1834503763, now seen corresponding path program 1 times [2023-11-19 05:16:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:16:03,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403456710] [2023-11-19 05:16:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:16:03,591 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 [2023-11-19 05:16:03,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:16:03,595 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:16:03,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80cb4b5b-968a-4cf7-8f01-60cabf158da0/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-19 05:16:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:16:03,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 05:16:03,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:16:03,808 INFO L378 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