./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:58:21,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:58:21,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:58:21,223 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:58:21,224 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:58:21,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:58:21,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:58:21,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:58:21,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:58:21,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:58:21,273 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:58:21,274 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:58:21,275 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:58:21,277 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:58:21,277 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:58:21,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:58:21,278 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:58:21,279 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:58:21,280 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:58:21,280 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:58:21,281 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:58:21,281 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:58:21,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:58:21,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:58:21,284 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:58:21,284 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:58:21,285 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:58:21,285 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:58:21,286 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:58:21,286 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:58:21,288 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:58:21,288 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:58:21,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:58:21,289 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:58:21,289 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:58:21,289 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:58:21,290 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:58:21,290 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:58:21,290 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:58:21,291 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:58:21,291 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:58:21,292 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:58:21,292 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:58:21,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:58:21,293 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:58:21,293 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:58:21,293 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_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 [2023-11-06 20:58:21,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:58:21,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:58:21,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:58:21,598 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:58:21,599 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:58:21,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2023-11-06 20:58:24,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:58:25,099 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:58:25,100 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2023-11-06 20:58:25,117 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/fa4519559/930f2e61dcef47bb9142361ab02a13d1/FLAG6d44d6321 [2023-11-06 20:58:25,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/fa4519559/930f2e61dcef47bb9142361ab02a13d1 [2023-11-06 20:58:25,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:58:25,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:58:25,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:58:25,154 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:58:25,159 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:58:25,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:58:25" (1/1) ... [2023-11-06 20:58:25,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b138943 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:25, skipping insertion in model container [2023-11-06 20:58:25,162 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:58:25" (1/1) ... [2023-11-06 20:58:25,233 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:58:25,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:58:25,597 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) [2023-11-06 20:58:25,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@526de428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:25, skipping insertion in model container [2023-11-06 20:58:25,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:58:25,599 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 20:58:25,600 INFO L158 Benchmark]: Toolchain (without parser) took 450.26ms. Allocated memory is still 146.8MB. Free memory was 116.0MB in the beginning and 104.2MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 20:58:25,601 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 121.6MB. Free memory was 82.3MB in the beginning and 82.2MB in the end (delta: 70.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:58:25,602 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.10ms. Allocated memory is still 146.8MB. Free memory was 115.8MB in the beginning and 104.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 20:58:25,604 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 121.6MB. Free memory was 82.3MB in the beginning and 82.2MB in the end (delta: 70.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 445.10ms. Allocated memory is still 146.8MB. Free memory was 115.8MB in the beginning and 104.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:58:28,105 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:58:28,259 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-06 20:58:28,269 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:58:28,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:58:28,316 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:58:28,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:58:28,317 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:58:28,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:58:28,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:58:28,325 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:58:28,325 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:58:28,326 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:58:28,327 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:58:28,328 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:58:28,328 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:58:28,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:58:28,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:58:28,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:58:28,331 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:58:28,332 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:58:28,332 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:58:28,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:58:28,333 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:58:28,334 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:58:28,334 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:58:28,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:58:28,335 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:58:28,335 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 20:58:28,336 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 20:58:28,337 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:58:28,338 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:58:28,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:58:28,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:58:28,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 20:58:28,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:58:28,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:58:28,340 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:58:28,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:58:28,341 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-06 20:58:28,341 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 20:58:28,342 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:58:28,342 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:58:28,342 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_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7870b42a63b59b364c5190e807226b403761bdc30acb17e66a1329fa0ed9e16 [2023-11-06 20:58:28,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:58:28,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:58:28,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:58:28,803 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:58:28,804 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:58:28,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2023-11-06 20:58:32,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:58:32,568 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:58:32,568 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/sv-benchmarks/c/list-ext-properties/test-0019_1-1.i [2023-11-06 20:58:32,584 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/69a502a4c/e78f92e31c0b4fe1a5030609851bf35b/FLAGec81ba13f [2023-11-06 20:58:32,596 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/data/69a502a4c/e78f92e31c0b4fe1a5030609851bf35b [2023-11-06 20:58:32,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:58:32,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:58:32,602 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:58:32,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:58:32,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:58:32,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:58:32" (1/1) ... [2023-11-06 20:58:32,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@530223db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:32, skipping insertion in model container [2023-11-06 20:58:32,610 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:58:32" (1/1) ... [2023-11-06 20:58:32,661 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:58:33,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:58:33,089 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 20:58:33,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:58:33,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:58:33,179 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:58:33,234 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:58:33,307 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:58:33,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33 WrapperNode [2023-11-06 20:58:33,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:58:33,309 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:58:33,309 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:58:33,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:58:33,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,403 INFO L138 Inliner]: procedures = 128, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 55 [2023-11-06 20:58:33,404 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:58:33,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:58:33,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:58:33,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:58:33,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,438 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,440 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,450 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,465 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,477 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,480 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:58:33,481 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:58:33,482 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:58:33,482 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:58:33,483 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (1/1) ... [2023-11-06 20:58:33,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:58:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:58:33,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:58:33,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:58:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 20:58:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:58:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:58:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:58:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:58:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:58:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:58:33,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 20:58:33,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 20:58:33,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:58:33,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:58:33,741 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:58:33,743 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:58:34,199 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:58:34,206 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:58:34,207 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 20:58:34,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:58:34 BoogieIcfgContainer [2023-11-06 20:58:34,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:58:34,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:58:34,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:58:34,218 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:58:34,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:58:32" (1/3) ... [2023-11-06 20:58:34,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec32ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:58:34, skipping insertion in model container [2023-11-06 20:58:34,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:58:33" (2/3) ... [2023-11-06 20:58:34,220 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec32ae6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:58:34, skipping insertion in model container [2023-11-06 20:58:34,220 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:58:34" (3/3) ... [2023-11-06 20:58:34,222 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0019_1-1.i [2023-11-06 20:58:34,239 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:58:34,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-06 20:58:34,311 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:58:34,317 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;@5ca2396b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:58:34,318 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-06 20:58:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 63 states, 31 states have (on average 2.032258064516129) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:58:34,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:34,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:58:34,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:34,333 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2023-11-06 20:58:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:34,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338239402] [2023-11-06 20:58:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:34,346 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 [2023-11-06 20:58:34,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:34,355 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:34,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:34,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:58:34,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:34,567 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 20:58:34,568 INFO L351 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-11-06 20:58:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:34,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:34,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:34,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338239402] [2023-11-06 20:58:34,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338239402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:34,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:58:34,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829384220] [2023-11-06 20:58:34,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:58:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:58:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:58:34,656 INFO L87 Difference]: Start difference. First operand has 63 states, 31 states have (on average 2.032258064516129) internal successors, (63), 62 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:34,857 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2023-11-06 20:58:34,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:58:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:58:34,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:34,868 INFO L225 Difference]: With dead ends: 59 [2023-11-06 20:58:34,868 INFO L226 Difference]: Without dead ends: 57 [2023-11-06 20:58:34,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:58:34,873 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 17 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:34,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 65 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-06 20:58:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-06 20:58:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 30 states have (on average 1.9) internal successors, (57), 56 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2023-11-06 20:58:34,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 3 [2023-11-06 20:58:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:34,912 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2023-11-06 20:58:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2023-11-06 20:58:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:58:34,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:34,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:58:34,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:35,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:35,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:35,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2023-11-06 20:58:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482677010] [2023-11-06 20:58:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:35,131 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 [2023-11-06 20:58:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:35,132 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:35,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:35,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 20:58:35,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:35,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:35,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 20:58:35,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:35,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:35,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482677010] [2023-11-06 20:58:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482677010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:35,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:35,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:58:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688620426] [2023-11-06 20:58:35,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:58:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:58:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:58:35,319 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:35,491 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2023-11-06 20:58:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:58:35,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-06 20:58:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:35,494 INFO L225 Difference]: With dead ends: 56 [2023-11-06 20:58:35,494 INFO L226 Difference]: Without dead ends: 56 [2023-11-06 20:58:35,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:58:35,496 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 1 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:35,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-06 20:58:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-06 20:58:35,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2023-11-06 20:58:35,504 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 3 [2023-11-06 20:58:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:35,504 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2023-11-06 20:58:35,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2023-11-06 20:58:35,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:58:35,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:35,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-06 20:58:35,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:35,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:35,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:35,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash 28691811, now seen corresponding path program 1 times [2023-11-06 20:58:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:35,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603080683] [2023-11-06 20:58:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:35,719 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 [2023-11-06 20:58:35,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:35,721 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:35,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:35,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 20:58:35,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:35,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:35,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 20:58:35,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:35,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:35,995 INFO L351 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 [2023-11-06 20:58:36,016 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 20:58:36,017 INFO L351 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 [2023-11-06 20:58:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:36,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:36,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:36,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603080683] [2023-11-06 20:58:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603080683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:58:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784093426] [2023-11-06 20:58:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:58:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:58:36,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:58:36,033 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:36,269 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2023-11-06 20:58:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:58:36,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 20:58:36,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:36,270 INFO L225 Difference]: With dead ends: 53 [2023-11-06 20:58:36,270 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 20:58:36,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:58:36,272 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:36,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 78 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 20:58:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-06 20:58:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 52 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2023-11-06 20:58:36,278 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 5 [2023-11-06 20:58:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:36,278 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2023-11-06 20:58:36,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2023-11-06 20:58:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:58:36,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:36,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:36,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:36,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:36,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:36,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:36,483 INFO L85 PathProgramCache]: Analyzing trace with hash 59199982, now seen corresponding path program 1 times [2023-11-06 20:58:36,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:36,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827595950] [2023-11-06 20:58:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:36,484 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 [2023-11-06 20:58:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:36,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:36,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 20:58:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:36,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-06 20:58:36,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:36,613 INFO L351 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 [2023-11-06 20:58:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:36,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-06 20:58:36,671 INFO L351 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 [2023-11-06 20:58:36,678 INFO L351 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 [2023-11-06 20:58:36,751 INFO L322 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-06 20:58:36,754 INFO L351 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 16 treesize of output 18 [2023-11-06 20:58:36,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-06 20:58:36,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-06 20:58:36,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 14 [2023-11-06 20:58:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:37,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:37,009 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:37,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827595950] [2023-11-06 20:58:37,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827595950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:37,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:37,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:58:37,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503613619] [2023-11-06 20:58:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:37,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:58:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:37,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:58:37,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:58:37,012 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:37,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:37,594 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2023-11-06 20:58:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:58:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 20:58:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:37,596 INFO L225 Difference]: With dead ends: 52 [2023-11-06 20:58:37,596 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 20:58:37,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 20:58:37,598 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:37,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 182 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:58:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 20:58:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-06 20:58:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2023-11-06 20:58:37,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 8 [2023-11-06 20:58:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:37,604 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2023-11-06 20:58:37,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2023-11-06 20:58:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:58:37,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:37,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:37,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:37,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:37,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:37,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:37,818 INFO L85 PathProgramCache]: Analyzing trace with hash 59199981, now seen corresponding path program 1 times [2023-11-06 20:58:37,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:37,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [293592795] [2023-11-06 20:58:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:37,818 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 [2023-11-06 20:58:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:37,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:37,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-06 20:58:37,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:37,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 20:58:37,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:37,938 INFO L322 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-06 20:58:37,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 22 [2023-11-06 20:58:37,977 INFO L322 Elim1Store]: treesize reduction 41, result has 6.8 percent of original size [2023-11-06 20:58:37,977 INFO L351 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 1 case distinctions, treesize of input 17 treesize of output 14 [2023-11-06 20:58:37,998 INFO L351 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 [2023-11-06 20:58:38,030 INFO L322 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-11-06 20:58:38,030 INFO L351 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 18 treesize of output 24 [2023-11-06 20:58:38,085 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 20:58:38,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:58:38,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2023-11-06 20:58:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:38,172 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:38,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [293592795] [2023-11-06 20:58:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [293592795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:38,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:58:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440931373] [2023-11-06 20:58:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:58:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:38,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:58:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:58:38,175 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:38,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:38,675 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2023-11-06 20:58:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:58:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 20:58:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:38,676 INFO L225 Difference]: With dead ends: 51 [2023-11-06 20:58:38,676 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 20:58:38,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-06 20:58:38,678 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:38,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 88 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:58:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 20:58:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-06 20:58:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.7) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:38,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2023-11-06 20:58:38,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 8 [2023-11-06 20:58:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:38,683 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2023-11-06 20:58:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2023-11-06 20:58:38,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:58:38,684 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:38,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:38,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:38,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:38,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:38,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:38,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937559, now seen corresponding path program 1 times [2023-11-06 20:58:38,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:38,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258080791] [2023-11-06 20:58:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:38,886 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 [2023-11-06 20:58:38,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:38,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:38,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:39,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 20:58:39,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:39,059 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-11-06 20:58:39,060 INFO L351 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 15 treesize of output 11 [2023-11-06 20:58:39,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:39,096 INFO L351 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 [2023-11-06 20:58:39,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2023-11-06 20:58:39,258 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:39,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2023-11-06 20:58:39,288 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:58:39,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-06 20:58:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:39,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:39,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:39,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258080791] [2023-11-06 20:58:39,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258080791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:39,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:39,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 20:58:39,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80683533] [2023-11-06 20:58:39,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:39,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:58:39,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:39,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:58:39,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:58:39,308 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:39,926 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2023-11-06 20:58:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 20:58:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 20:58:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:39,927 INFO L225 Difference]: With dead ends: 50 [2023-11-06 20:58:39,927 INFO L226 Difference]: Without dead ends: 50 [2023-11-06 20:58:39,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-06 20:58:39,928 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:39,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 125 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:58:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-06 20:58:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-06 20:58:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2023-11-06 20:58:39,933 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 11 [2023-11-06 20:58:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:39,933 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2023-11-06 20:58:39,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2023-11-06 20:58:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:58:39,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:39,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:39,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:40,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:40,144 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:40,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1604937558, now seen corresponding path program 1 times [2023-11-06 20:58:40,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:40,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152356748] [2023-11-06 20:58:40,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:40,145 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 [2023-11-06 20:58:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:40,145 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:40,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-06 20:58:40,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:40,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 20:58:40,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:40,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:40,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:40,348 INFO L351 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 [2023-11-06 20:58:40,402 INFO L351 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 [2023-11-06 20:58:40,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-06 20:58:40,569 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:40,569 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-06 20:58:40,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 20:58:40,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-06 20:58:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:40,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:40,658 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152356748] [2023-11-06 20:58:40,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152356748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:40,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:40,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 20:58:40,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012514691] [2023-11-06 20:58:40,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:40,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:58:40,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:40,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:58:40,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:58:40,660 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:40,965 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2023-11-06 20:58:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:58:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 20:58:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:40,967 INFO L225 Difference]: With dead ends: 49 [2023-11-06 20:58:40,967 INFO L226 Difference]: Without dead ends: 49 [2023-11-06 20:58:40,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 20:58:40,969 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 4 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:40,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 145 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:40,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-06 20:58:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-06 20:58:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 48 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2023-11-06 20:58:40,973 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 11 [2023-11-06 20:58:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:40,973 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2023-11-06 20:58:40,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2023-11-06 20:58:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:58:40,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:40,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:40,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:41,187 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:41,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886990, now seen corresponding path program 1 times [2023-11-06 20:58:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:41,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193560219] [2023-11-06 20:58:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:41,188 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 [2023-11-06 20:58:41,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:41,189 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:41,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-06 20:58:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:41,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:58:41,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:41,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:41,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193560219] [2023-11-06 20:58:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193560219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:58:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441932922] [2023-11-06 20:58:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:58:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:58:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:58:41,394 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:41,637 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2023-11-06 20:58:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:58:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:58:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:41,638 INFO L225 Difference]: With dead ends: 51 [2023-11-06 20:58:41,638 INFO L226 Difference]: Without dead ends: 51 [2023-11-06 20:58:41,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:58:41,639 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 58 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:41,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 54 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:41,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-06 20:58:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-11-06 20:58:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-11-06 20:58:41,644 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 14 [2023-11-06 20:58:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:41,645 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-11-06 20:58:41,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-11-06 20:58:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:58:41,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:41,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:41,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:41,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:41,865 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:41,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1118886989, now seen corresponding path program 1 times [2023-11-06 20:58:41,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:41,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425453948] [2023-11-06 20:58:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:41,866 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 [2023-11-06 20:58:41,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:41,867 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:41,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:58:41,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:42,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:42,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:42,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425453948] [2023-11-06 20:58:42,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425453948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:42,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:42,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:58:42,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485272609] [2023-11-06 20:58:42,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:42,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:58:42,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:42,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:58:42,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:58:42,122 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:42,318 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2023-11-06 20:58:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:58:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-06 20:58:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:42,320 INFO L225 Difference]: With dead ends: 43 [2023-11-06 20:58:42,320 INFO L226 Difference]: Without dead ends: 43 [2023-11-06 20:58:42,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:58:42,321 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:42,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 49 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:58:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-06 20:58:42,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-06 20:58:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 42 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2023-11-06 20:58:42,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 14 [2023-11-06 20:58:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:42,324 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2023-11-06 20:58:42,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2023-11-06 20:58:42,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:58:42,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:42,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:42,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:42,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:42,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1959919348, now seen corresponding path program 1 times [2023-11-06 20:58:42,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787521447] [2023-11-06 20:58:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:42,527 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 [2023-11-06 20:58:42,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:42,528 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:42,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:42,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 20:58:42,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:42,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:42,814 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:42,860 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 20:58:42,860 INFO L351 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 [2023-11-06 20:58:42,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:42,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 12 [2023-11-06 20:58:43,082 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:43,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2023-11-06 20:58:43,259 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-06 20:58:43,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2023-11-06 20:58:43,411 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:58:43,412 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 19 [2023-11-06 20:58:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:43,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:43,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787521447] [2023-11-06 20:58:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787521447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 20:58:43,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213393468] [2023-11-06 20:58:43,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:58:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:58:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-06 20:58:43,491 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:44,762 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2023-11-06 20:58:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 20:58:44,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:58:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:44,764 INFO L225 Difference]: With dead ends: 43 [2023-11-06 20:58:44,764 INFO L226 Difference]: Without dead ends: 43 [2023-11-06 20:58:44,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-06 20:58:44,765 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:44,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 125 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:58:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-06 20:58:44,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-11-06 20:58:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 40 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2023-11-06 20:58:44,768 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 18 [2023-11-06 20:58:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:44,769 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2023-11-06 20:58:44,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2023-11-06 20:58:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 20:58:44,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:44,770 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:44,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:44,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:44,979 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:44,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1959919349, now seen corresponding path program 1 times [2023-11-06 20:58:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333881939] [2023-11-06 20:58:44,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:44,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:44,982 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:44,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:45,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:45,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 20:58:45,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:45,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:45,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:45,367 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 20:58:45,367 INFO L351 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 [2023-11-06 20:58:45,418 INFO L351 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 8 treesize of output 1 [2023-11-06 20:58:45,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:45,430 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 12 [2023-11-06 20:58:45,607 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:45,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2023-11-06 20:58:45,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 28 [2023-11-06 20:58:45,996 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-06 20:58:45,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 67 [2023-11-06 20:58:46,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 28 [2023-11-06 20:58:46,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2023-11-06 20:58:46,383 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-06 20:58:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:46,670 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:46,670 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:46,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333881939] [2023-11-06 20:58:46,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333881939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:46,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:46,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-06 20:58:46,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454714012] [2023-11-06 20:58:46,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:58:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:46,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:58:46,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-06 20:58:46,672 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:49,082 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2023-11-06 20:58:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-06 20:58:49,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 20:58:49,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:49,084 INFO L225 Difference]: With dead ends: 40 [2023-11-06 20:58:49,085 INFO L226 Difference]: Without dead ends: 40 [2023-11-06 20:58:49,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-06 20:58:49,086 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:49,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 105 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 20:58:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-06 20:58:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-06 20:58:49,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2023-11-06 20:58:49,090 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 18 [2023-11-06 20:58:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:49,091 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2023-11-06 20:58:49,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2023-11-06 20:58:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:58:49,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:49,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:49,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:49,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:49,303 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:49,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:49,304 INFO L85 PathProgramCache]: Analyzing trace with hash 627957652, now seen corresponding path program 1 times [2023-11-06 20:58:49,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:49,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290503690] [2023-11-06 20:58:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:49,305 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 [2023-11-06 20:58:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:49,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:49,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:49,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 20:58:49,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:49,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:49,689 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:49,753 INFO L322 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-11-06 20:58:49,753 INFO L351 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 [2023-11-06 20:58:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:49,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 12 [2023-11-06 20:58:50,052 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:50,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2023-11-06 20:58:50,194 INFO L322 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-06 20:58:50,194 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2023-11-06 20:58:50,382 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 20:58:50,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 19 [2023-11-06 20:58:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:50,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:50,509 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:50,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290503690] [2023-11-06 20:58:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290503690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:50,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:50,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 20:58:50,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386933468] [2023-11-06 20:58:50,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:50,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:58:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:50,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:58:50,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:58:50,511 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:51,579 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2023-11-06 20:58:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 20:58:51,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 20:58:51,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:51,581 INFO L225 Difference]: With dead ends: 41 [2023-11-06 20:58:51,581 INFO L226 Difference]: Without dead ends: 41 [2023-11-06 20:58:51,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:58:51,583 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:51,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 109 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:58:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-06 20:58:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-06 20:58:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 38 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2023-11-06 20:58:51,587 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 19 [2023-11-06 20:58:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:51,587 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2023-11-06 20:58:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2023-11-06 20:58:51,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:58:51,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:51,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:51,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:58:51,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:51,799 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:51,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:51,800 INFO L85 PathProgramCache]: Analyzing trace with hash 627957653, now seen corresponding path program 1 times [2023-11-06 20:58:51,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:51,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210702016] [2023-11-06 20:58:51,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:51,801 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 [2023-11-06 20:58:51,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:51,802 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:51,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-06 20:58:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:52,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-06 20:58:52,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:52,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:52,112 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:52,174 INFO L351 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 [2023-11-06 20:58:52,194 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 20:58:52,195 INFO L351 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 [2023-11-06 20:58:52,259 INFO L351 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 [2023-11-06 20:58:52,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 12 [2023-11-06 20:58:52,482 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:52,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2023-11-06 20:58:52,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 20:58:52,694 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 20:58:52,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2023-11-06 20:58:52,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 20:58:52,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2023-11-06 20:58:52,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-06 20:58:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:58:53,003 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:58:53,003 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:58:53,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210702016] [2023-11-06 20:58:53,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210702016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:58:53,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:58:53,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-06 20:58:53,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429796144] [2023-11-06 20:58:53,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:58:53,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:58:53,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:58:53,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:58:53,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:58:53,005 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:58:54,087 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2023-11-06 20:58:54,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 20:58:54,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 20:58:54,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:58:54,089 INFO L225 Difference]: With dead ends: 37 [2023-11-06 20:58:54,089 INFO L226 Difference]: Without dead ends: 37 [2023-11-06 20:58:54,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:58:54,090 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 20:58:54,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 96 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 20:58:54,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-06 20:58:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-06 20:58:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2023-11-06 20:58:54,094 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 19 [2023-11-06 20:58:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:58:54,094 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2023-11-06 20:58:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:58:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2023-11-06 20:58:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-06 20:58:54,095 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:58:54,096 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:58:54,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-06 20:58:54,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:58:54,310 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-06 20:58:54,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:58:54,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2123084748, now seen corresponding path program 1 times [2023-11-06 20:58:54,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:58:54,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963137766] [2023-11-06 20:58:54,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:58:54,311 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 [2023-11-06 20:58:54,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:58:54,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:58:54,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b0e826d-ce07-4ca8-b108-cba3d3f6523f/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-06 20:58:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:58:54,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 20:58:54,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:58:54,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-06 20:58:54,667 INFO L351 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 [2023-11-06 20:58:54,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-06 20:58:54,728 INFO L322 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-06 20:58:54,729 INFO L351 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 [2023-11-06 20:58:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:54,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-11-06 20:58:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:58:54,818 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 12