./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:39:28,458 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:39:28,533 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 18:39:28,538 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:39:28,539 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:39:28,564 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:39:28,565 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:39:28,566 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:39:28,567 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:39:28,567 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:39:28,568 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:39:28,568 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:39:28,569 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:39:28,569 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:39:28,570 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:39:28,570 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:39:28,571 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:39:28,571 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:39:28,572 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:39:28,572 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:39:28,573 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:39:28,574 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:39:28,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:39:28,575 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:39:28,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:39:28,576 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:39:28,576 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:39:28,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:39:28,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:39:28,578 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:39:28,578 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:39:28,578 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:39:28,579 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:39:28,579 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:39:28,579 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:39:28,579 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:39:28,580 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:39:28,580 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:39:28,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:39:28,580 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:39:28,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:39:28,581 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:39:28,581 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:39:28,581 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:39:28,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:39:28,582 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:39:28,582 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:39:28,582 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:39:28,582 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_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2023-12-02 18:39:28,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:39:28,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:39:28,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:39:28,832 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:39:28,833 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:39:28,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-12-02 18:39:31,689 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:39:31,988 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:39:31,989 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-12-02 18:39:32,007 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/8a4de233c/afbf091872bc43fe9e0f5d9f51b8b1aa/FLAG2f1c5eaae [2023-12-02 18:39:32,020 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/8a4de233c/afbf091872bc43fe9e0f5d9f51b8b1aa [2023-12-02 18:39:32,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:39:32,024 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:39:32,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:32,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:39:32,031 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:39:32,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:32" (1/1) ... [2023-12-02 18:39:32,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9f4c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:32, skipping insertion in model container [2023-12-02 18:39:32,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:32" (1/1) ... [2023-12-02 18:39:32,104 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:39:32,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:32,711 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) [2023-12-02 18:39:32,712 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6f7da862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:32, skipping insertion in model container [2023-12-02 18:39:32,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:32,713 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 18:39:32,715 INFO L158 Benchmark]: Toolchain (without parser) took 689.74ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 89.5MB in the beginning and 133.7MB in the end (delta: -44.2MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2023-12-02 18:39:32,716 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:39:32,717 INFO L158 Benchmark]: CACSL2BoogieTranslator took 686.95ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 89.5MB in the beginning and 133.7MB in the end (delta: -44.2MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. [2023-12-02 18:39:32,719 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 134.2MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 686.95ms. Allocated memory was 134.2MB in the beginning and 174.1MB in the end (delta: 39.8MB). Free memory was 89.5MB in the beginning and 133.7MB in the end (delta: -44.2MB). Peak memory consumption was 33.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:39:34,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:39:34,666 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 18:39:34,672 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:39:34,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:39:34,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:39:34,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:39:34,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:39:34,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:39:34,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:39:34,705 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:39:34,705 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:39:34,706 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:39:34,706 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:39:34,707 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:39:34,708 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:39:34,709 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:39:34,709 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:39:34,710 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:39:34,710 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:39:34,711 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:39:34,711 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:39:34,712 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:39:34,712 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:39:34,712 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:39:34,713 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:39:34,713 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:39:34,714 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:39:34,714 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 18:39:34,715 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 18:39:34,715 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:39:34,715 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:39:34,716 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:39:34,716 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:39:34,716 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 18:39:34,717 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:39:34,717 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:39:34,717 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:39:34,718 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:39:34,718 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:39:34,718 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 18:39:34,718 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 18:39:34,719 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:39:34,719 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:39:34,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:39:34,719 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_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9885703216edf9cfe4bfb438db591a48e102e73a3e0423f90ce871c05fdf2b57 [2023-12-02 18:39:35,031 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:39:35,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:39:35,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:39:35,055 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:39:35,056 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:39:35,057 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-12-02 18:39:37,967 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:39:38,271 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:39:38,271 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-1.i [2023-12-02 18:39:38,290 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/f6f399651/1188cc7da8834bbaa14b8b514dd92cac/FLAG2c12e189c [2023-12-02 18:39:38,305 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/data/f6f399651/1188cc7da8834bbaa14b8b514dd92cac [2023-12-02 18:39:38,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:39:38,309 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:39:38,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:38,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:39:38,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:39:38,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:38" (1/1) ... [2023-12-02 18:39:38,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f5b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:38, skipping insertion in model container [2023-12-02 18:39:38,318 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:39:38" (1/1) ... [2023-12-02 18:39:38,385 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:39:38,953 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:38,968 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 18:39:38,991 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:39:39,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:39,135 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:39:39,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:39:39,270 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:39:39,278 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:39:39,278 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39 WrapperNode [2023-12-02 18:39:39,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:39:39,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:39:39,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:39:39,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:39:39,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,330 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,406 INFO L138 Inliner]: procedures = 180, calls = 525, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2203 [2023-12-02 18:39:39,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:39:39,408 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:39:39,408 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:39:39,408 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:39:39,417 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,570 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:39:39,571 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:39:39,571 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:39:39,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:39:39,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (1/1) ... [2023-12-02 18:39:39,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:39:39,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:39,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:39:39,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:39:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-12-02 18:39:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2023-12-02 18:39:39,643 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2023-12-02 18:39:39,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 18:39:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-02 18:39:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-02 18:39:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 18:39:39,644 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 18:39:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:39:39,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:39:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:39:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:39:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-12-02 18:39:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:39:39,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:39:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 18:39:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 18:39:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:39:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:39:39,877 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:39:39,879 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:39:39,883 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-12-02 18:39:48,926 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:39:49,137 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:39:49,138 INFO L309 CfgBuilder]: Removed 151 assume(true) statements. [2023-12-02 18:39:49,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:39:49 BoogieIcfgContainer [2023-12-02 18:39:49,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:39:49,141 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:39:49,141 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:39:49,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:39:49,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:39:38" (1/3) ... [2023-12-02 18:39:49,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45855a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:39:49, skipping insertion in model container [2023-12-02 18:39:49,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:39:39" (2/3) ... [2023-12-02 18:39:49,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45855a4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:39:49, skipping insertion in model container [2023-12-02 18:39:49,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:39:49" (3/3) ... [2023-12-02 18:39:49,146 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-1.i [2023-12-02 18:39:49,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:39:49,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 990 error locations. [2023-12-02 18:39:49,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:39:49,228 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;@34190981, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:39:49,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 990 error locations. [2023-12-02 18:39:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 1873 states, 871 states have (on average 2.4615384615384617) internal successors, (2144), 1859 states have internal predecessors, (2144), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-12-02 18:39:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 18:39:49,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:49,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 18:39:49,243 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:39:49,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:49,247 INFO L85 PathProgramCache]: Analyzing trace with hash 109812, now seen corresponding path program 1 times [2023-12-02 18:39:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:39:49,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054795509] [2023-12-02 18:39:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:49,257 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 [2023-12-02 18:39:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:39:49,260 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:39:49,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:39:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:49,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:39:49,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:49,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:39:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:49,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:49,590 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:39:49,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054795509] [2023-12-02 18:39:49,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054795509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:49,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:49,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 18:39:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691616338] [2023-12-02 18:39:49,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:39:49,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:49,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:49,630 INFO L87 Difference]: Start difference. First operand has 1873 states, 871 states have (on average 2.4615384615384617) internal successors, (2144), 1859 states have internal predecessors, (2144), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:39:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:53,792 INFO L93 Difference]: Finished difference Result 2324 states and 2487 transitions. [2023-12-02 18:39:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 18:39:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:53,816 INFO L225 Difference]: With dead ends: 2324 [2023-12-02 18:39:53,816 INFO L226 Difference]: Without dead ends: 2323 [2023-12-02 18:39:53,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:53,820 INFO L413 NwaCegarLoop]: 1065 mSDtfsCounter, 1779 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1789 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:53,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1789 Valid, 1374 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 18:39:53,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2023-12-02 18:39:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1986. [2023-12-02 18:39:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1986 states, 1008 states have (on average 2.257936507936508) internal successors, (2276), 1970 states have internal predecessors, (2276), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-02 18:39:53,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1986 states to 1986 states and 2308 transitions. [2023-12-02 18:39:53,945 INFO L78 Accepts]: Start accepts. Automaton has 1986 states and 2308 transitions. Word has length 2 [2023-12-02 18:39:53,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:53,946 INFO L495 AbstractCegarLoop]: Abstraction has 1986 states and 2308 transitions. [2023-12-02 18:39:53,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:39:53,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1986 states and 2308 transitions. [2023-12-02 18:39:53,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 18:39:53,947 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:53,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 18:39:53,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:39:54,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:39:54,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:39:54,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:54,153 INFO L85 PathProgramCache]: Analyzing trace with hash 109813, now seen corresponding path program 1 times [2023-12-02 18:39:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:39:54,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273022651] [2023-12-02 18:39:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:39:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:39:54,156 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:39:54,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:39:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:54,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:39:54,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:54,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:39:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:39:54,340 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:39:54,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:39:54,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273022651] [2023-12-02 18:39:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273022651] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:54,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:54,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 18:39:54,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209021970] [2023-12-02 18:39:54,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:54,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:54,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:39:54,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:54,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:54,344 INFO L87 Difference]: Start difference. First operand 1986 states and 2308 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:00,866 INFO L93 Difference]: Finished difference Result 2689 states and 3092 transitions. [2023-12-02 18:40:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-12-02 18:40:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:00,879 INFO L225 Difference]: With dead ends: 2689 [2023-12-02 18:40:00,880 INFO L226 Difference]: Without dead ends: 2689 [2023-12-02 18:40:00,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:00,881 INFO L413 NwaCegarLoop]: 1518 mSDtfsCounter, 776 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:00,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 2512 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-12-02 18:40:00,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2023-12-02 18:40:00,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 2367. [2023-12-02 18:40:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2367 states, 1387 states have (on average 2.1997116077865897) internal successors, (3051), 2348 states have internal predecessors, (3051), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2023-12-02 18:40:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2367 states to 2367 states and 3089 transitions. [2023-12-02 18:40:00,942 INFO L78 Accepts]: Start accepts. Automaton has 2367 states and 3089 transitions. Word has length 2 [2023-12-02 18:40:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:00,942 INFO L495 AbstractCegarLoop]: Abstraction has 2367 states and 3089 transitions. [2023-12-02 18:40:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2367 states and 3089 transitions. [2023-12-02 18:40:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 18:40:00,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:00,943 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 18:40:00,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 18:40:01,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:01,145 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:01,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:01,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1665027394, now seen corresponding path program 1 times [2023-12-02 18:40:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:01,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025395140] [2023-12-02 18:40:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:01,149 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:01,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:01,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:40:01,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:01,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:40:01,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:40:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:40:01,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:40:01,473 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:40:01,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:40:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:01,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:01,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:01,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025395140] [2023-12-02 18:40:01,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025395140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:01,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:01,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:40:01,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006914127] [2023-12-02 18:40:01,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:01,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:01,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:01,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:01,503 INFO L87 Difference]: Start difference. First operand 2367 states and 3089 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:14,222 INFO L93 Difference]: Finished difference Result 4416 states and 5288 transitions. [2023-12-02 18:40:14,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:14,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 18:40:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:14,244 INFO L225 Difference]: With dead ends: 4416 [2023-12-02 18:40:14,245 INFO L226 Difference]: Without dead ends: 4416 [2023-12-02 18:40:14,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:14,246 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 2164 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 3856 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2174 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 3880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:14,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2174 Valid, 2074 Invalid, 3880 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 3856 Invalid, 0 Unknown, 0 Unchecked, 12.5s Time] [2023-12-02 18:40:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4416 states. [2023-12-02 18:40:14,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4416 to 2949. [2023-12-02 18:40:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 1969 states have (on average 2.254443880142204) internal successors, (4439), 2924 states have internal predecessors, (4439), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:14,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4489 transitions. [2023-12-02 18:40:14,324 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4489 transitions. Word has length 6 [2023-12-02 18:40:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:14,324 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4489 transitions. [2023-12-02 18:40:14,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4489 transitions. [2023-12-02 18:40:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:40:14,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:14,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:14,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:14,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:14,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:14,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash -76241660, now seen corresponding path program 1 times [2023-12-02 18:40:14,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:14,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060117085] [2023-12-02 18:40:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:14,531 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 [2023-12-02 18:40:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:14,532 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:14,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:14,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:40:14,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:14,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:40:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:14,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:14,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:14,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060117085] [2023-12-02 18:40:14,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060117085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:14,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:14,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:40:14,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307612242] [2023-12-02 18:40:14,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:14,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:14,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:14,717 INFO L87 Difference]: Start difference. First operand 2949 states and 4489 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:19,431 INFO L93 Difference]: Finished difference Result 4019 states and 5872 transitions. [2023-12-02 18:40:19,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 18:40:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:19,452 INFO L225 Difference]: With dead ends: 4019 [2023-12-02 18:40:19,452 INFO L226 Difference]: Without dead ends: 4019 [2023-12-02 18:40:19,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:19,454 INFO L413 NwaCegarLoop]: 1629 mSDtfsCounter, 1812 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1822 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:19,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1822 Valid, 2203 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1454 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 18:40:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2023-12-02 18:40:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 2858. [2023-12-02 18:40:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 1969 states have (on average 2.1462671406805485) internal successors, (4226), 2833 states have internal predecessors, (4226), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4276 transitions. [2023-12-02 18:40:19,524 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4276 transitions. Word has length 7 [2023-12-02 18:40:19,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:19,525 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4276 transitions. [2023-12-02 18:40:19,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:19,525 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4276 transitions. [2023-12-02 18:40:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 18:40:19,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:19,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:19,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:19,727 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:19,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -76241659, now seen corresponding path program 1 times [2023-12-02 18:40:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485297874] [2023-12-02 18:40:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:19,729 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 [2023-12-02 18:40:19,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:19,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:19,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:19,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:40:19,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:19,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:40:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:19,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:19,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:19,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485297874] [2023-12-02 18:40:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485297874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:19,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:19,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:40:19,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735569196] [2023-12-02 18:40:19,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:19,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:19,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:19,945 INFO L87 Difference]: Start difference. First operand 2858 states and 4276 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:27,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:27,043 INFO L93 Difference]: Finished difference Result 4373 states and 6433 transitions. [2023-12-02 18:40:27,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:27,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 18:40:27,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:27,065 INFO L225 Difference]: With dead ends: 4373 [2023-12-02 18:40:27,066 INFO L226 Difference]: Without dead ends: 4373 [2023-12-02 18:40:27,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:27,067 INFO L413 NwaCegarLoop]: 1948 mSDtfsCounter, 1251 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1255 SdHoareTripleChecker+Valid, 2769 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:27,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1255 Valid, 2769 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-12-02 18:40:27,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2023-12-02 18:40:27,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 3114. [2023-12-02 18:40:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3114 states, 2235 states have (on average 2.135123042505593) internal successors, (4772), 3089 states have internal predecessors, (4772), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3114 states to 3114 states and 4822 transitions. [2023-12-02 18:40:27,174 INFO L78 Accepts]: Start accepts. Automaton has 3114 states and 4822 transitions. Word has length 7 [2023-12-02 18:40:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:27,175 INFO L495 AbstractCegarLoop]: Abstraction has 3114 states and 4822 transitions. [2023-12-02 18:40:27,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3114 states and 4822 transitions. [2023-12-02 18:40:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:40:27,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:27,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:27,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 18:40:27,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:27,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:27,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:27,379 INFO L85 PathProgramCache]: Analyzing trace with hash 366061891, now seen corresponding path program 1 times [2023-12-02 18:40:27,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:27,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225751904] [2023-12-02 18:40:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:27,380 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 [2023-12-02 18:40:27,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:27,381 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:27,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:27,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:27,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:40:27,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:27,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:27,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:27,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225751904] [2023-12-02 18:40:27,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225751904] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:27,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:27,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:27,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336529476] [2023-12-02 18:40:27,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:27,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:27,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:27,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:27,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:27,599 INFO L87 Difference]: Start difference. First operand 3114 states and 4822 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:28,986 INFO L93 Difference]: Finished difference Result 3060 states and 4742 transitions. [2023-12-02 18:40:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:28,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 18:40:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:29,000 INFO L225 Difference]: With dead ends: 3060 [2023-12-02 18:40:29,000 INFO L226 Difference]: Without dead ends: 3060 [2023-12-02 18:40:29,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:29,001 INFO L413 NwaCegarLoop]: 1622 mSDtfsCounter, 70 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:29,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3195 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 18:40:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2023-12-02 18:40:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3060. [2023-12-02 18:40:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2205 states have (on average 2.127891156462585) internal successors, (4692), 3035 states have internal predecessors, (4692), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 4742 transitions. [2023-12-02 18:40:29,084 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 4742 transitions. Word has length 10 [2023-12-02 18:40:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:29,084 INFO L495 AbstractCegarLoop]: Abstraction has 3060 states and 4742 transitions. [2023-12-02 18:40:29,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:40:29,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 4742 transitions. [2023-12-02 18:40:29,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 18:40:29,085 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:29,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:29,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 18:40:29,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:29,286 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:29,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:29,286 INFO L85 PathProgramCache]: Analyzing trace with hash -401786979, now seen corresponding path program 1 times [2023-12-02 18:40:29,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:29,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961278279] [2023-12-02 18:40:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:29,287 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 [2023-12-02 18:40:29,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:29,288 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:29,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:29,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:40:29,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:29,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:29,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:29,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961278279] [2023-12-02 18:40:29,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961278279] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:29,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:29,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:40:29,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60106589] [2023-12-02 18:40:29,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:29,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:29,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:29,445 INFO L87 Difference]: Start difference. First operand 3060 states and 4742 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-02 18:40:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:31,588 INFO L93 Difference]: Finished difference Result 3046 states and 4700 transitions. [2023-12-02 18:40:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 18:40:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:31,606 INFO L225 Difference]: With dead ends: 3046 [2023-12-02 18:40:31,606 INFO L226 Difference]: Without dead ends: 3046 [2023-12-02 18:40:31,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:31,607 INFO L413 NwaCegarLoop]: 1591 mSDtfsCounter, 58 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4749 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:31,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4749 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 18:40:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2023-12-02 18:40:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 3044. [2023-12-02 18:40:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2203 states have (on average 2.109850204266909) internal successors, (4648), 3019 states have internal predecessors, (4648), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4698 transitions. [2023-12-02 18:40:31,658 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4698 transitions. Word has length 12 [2023-12-02 18:40:31,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:31,658 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4698 transitions. [2023-12-02 18:40:31,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2023-12-02 18:40:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4698 transitions. [2023-12-02 18:40:31,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:40:31,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:31,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:31,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 18:40:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:31,864 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:31,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:31,864 INFO L85 PathProgramCache]: Analyzing trace with hash -666655844, now seen corresponding path program 1 times [2023-12-02 18:40:31,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:31,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013686271] [2023-12-02 18:40:31,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:31,865 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 [2023-12-02 18:40:31,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:31,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:31,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:32,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:40:32,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:32,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:32,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:32,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013686271] [2023-12-02 18:40:32,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013686271] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:32,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829410304] [2023-12-02 18:40:32,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:32,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:32,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:32,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:32,121 INFO L87 Difference]: Start difference. First operand 3044 states and 4698 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-02 18:40:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:33,684 INFO L93 Difference]: Finished difference Result 2930 states and 4458 transitions. [2023-12-02 18:40:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:33,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 18:40:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:33,696 INFO L225 Difference]: With dead ends: 2930 [2023-12-02 18:40:33,696 INFO L226 Difference]: Without dead ends: 2930 [2023-12-02 18:40:33,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:33,697 INFO L413 NwaCegarLoop]: 1564 mSDtfsCounter, 70 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3079 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:33,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3079 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 18:40:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2930 states. [2023-12-02 18:40:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2930 to 2930. [2023-12-02 18:40:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2930 states, 2113 states have (on average 2.0861334595362044) internal successors, (4408), 2905 states have internal predecessors, (4408), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2930 states to 2930 states and 4458 transitions. [2023-12-02 18:40:33,756 INFO L78 Accepts]: Start accepts. Automaton has 2930 states and 4458 transitions. Word has length 17 [2023-12-02 18:40:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:33,756 INFO L495 AbstractCegarLoop]: Abstraction has 2930 states and 4458 transitions. [2023-12-02 18:40:33,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-02 18:40:33,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2930 states and 4458 transitions. [2023-12-02 18:40:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:40:33,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:33,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:33,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 18:40:33,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:33,958 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:33,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:33,959 INFO L85 PathProgramCache]: Analyzing trace with hash -871126436, now seen corresponding path program 1 times [2023-12-02 18:40:33,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:33,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660834145] [2023-12-02 18:40:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:33,959 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 [2023-12-02 18:40:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:33,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:33,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:34,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:40:34,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:34,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:34,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:34,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660834145] [2023-12-02 18:40:34,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660834145] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:34,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:34,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:34,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848863679] [2023-12-02 18:40:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:34,172 INFO L87 Difference]: Start difference. First operand 2930 states and 4458 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-02 18:40:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:35,560 INFO L93 Difference]: Finished difference Result 2876 states and 4378 transitions. [2023-12-02 18:40:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 18:40:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:35,567 INFO L225 Difference]: With dead ends: 2876 [2023-12-02 18:40:35,567 INFO L226 Difference]: Without dead ends: 2876 [2023-12-02 18:40:35,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:35,568 INFO L413 NwaCegarLoop]: 1527 mSDtfsCounter, 70 mSDsluCounter, 1478 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:35,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3005 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 18:40:35,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2023-12-02 18:40:35,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2876. [2023-12-02 18:40:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2876 states, 2083 states have (on average 2.0777724435909746) internal successors, (4328), 2851 states have internal predecessors, (4328), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 4378 transitions. [2023-12-02 18:40:35,604 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 4378 transitions. Word has length 17 [2023-12-02 18:40:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:35,604 INFO L495 AbstractCegarLoop]: Abstraction has 2876 states and 4378 transitions. [2023-12-02 18:40:35,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2023-12-02 18:40:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 4378 transitions. [2023-12-02 18:40:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:40:35,605 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:35,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:35,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 18:40:35,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:35,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:35,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:35,806 INFO L85 PathProgramCache]: Analyzing trace with hash -706113418, now seen corresponding path program 1 times [2023-12-02 18:40:35,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:35,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865964586] [2023-12-02 18:40:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:35,807 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 [2023-12-02 18:40:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:35,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:35,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:35,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:40:35,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:35,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:35,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:35,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865964586] [2023-12-02 18:40:35,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865964586] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:35,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:35,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:40:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293146884] [2023-12-02 18:40:35,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:35,991 INFO L87 Difference]: Start difference. First operand 2876 states and 4378 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-12-02 18:40:38,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:38,005 INFO L93 Difference]: Finished difference Result 2862 states and 4252 transitions. [2023-12-02 18:40:38,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 [2023-12-02 18:40:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:38,012 INFO L225 Difference]: With dead ends: 2862 [2023-12-02 18:40:38,012 INFO L226 Difference]: Without dead ends: 2862 [2023-12-02 18:40:38,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:38,013 INFO L413 NwaCegarLoop]: 1496 mSDtfsCounter, 58 mSDsluCounter, 2968 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4464 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:38,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4464 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 18:40:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2023-12-02 18:40:38,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2856. [2023-12-02 18:40:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2077 states have (on average 2.0202214732787676) internal successors, (4196), 2831 states have internal predecessors, (4196), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4246 transitions. [2023-12-02 18:40:38,063 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4246 transitions. Word has length 19 [2023-12-02 18:40:38,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:38,063 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 4246 transitions. [2023-12-02 18:40:38,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-12-02 18:40:38,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4246 transitions. [2023-12-02 18:40:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 18:40:38,064 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:38,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:38,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 18:40:38,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:38,265 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:38,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 366115190, now seen corresponding path program 1 times [2023-12-02 18:40:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:38,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461926510] [2023-12-02 18:40:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:38,267 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 [2023-12-02 18:40:38,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:38,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:38,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:38,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:40:38,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:38,480 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:38,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:38,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461926510] [2023-12-02 18:40:38,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461926510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:38,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:38,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:40:38,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509810889] [2023-12-02 18:40:38,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:38,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:38,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:38,482 INFO L87 Difference]: Start difference. First operand 2856 states and 4246 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-12-02 18:40:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:40,657 INFO L93 Difference]: Finished difference Result 2842 states and 4204 transitions. [2023-12-02 18:40:40,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:40,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 [2023-12-02 18:40:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:40,664 INFO L225 Difference]: With dead ends: 2842 [2023-12-02 18:40:40,664 INFO L226 Difference]: Without dead ends: 2842 [2023-12-02 18:40:40,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:40,665 INFO L413 NwaCegarLoop]: 1475 mSDtfsCounter, 58 mSDsluCounter, 2926 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4401 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:40,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4401 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 18:40:40,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2023-12-02 18:40:40,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2840. [2023-12-02 18:40:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2075 states have (on average 2.000963855421687) internal successors, (4152), 2815 states have internal predecessors, (4152), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4202 transitions. [2023-12-02 18:40:40,702 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4202 transitions. Word has length 19 [2023-12-02 18:40:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:40,702 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 4202 transitions. [2023-12-02 18:40:40,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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) [2023-12-02 18:40:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4202 transitions. [2023-12-02 18:40:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 18:40:40,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:40,704 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, 1, 1, 1, 1, 1] [2023-12-02 18:40:40,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:40,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:40,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:40,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:40,905 INFO L85 PathProgramCache]: Analyzing trace with hash 82770443, now seen corresponding path program 1 times [2023-12-02 18:40:40,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:40,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661682229] [2023-12-02 18:40:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:40,905 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 [2023-12-02 18:40:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:40,906 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:40,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:41,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:40:41,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:41,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:40:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:41,115 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:41,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661682229] [2023-12-02 18:40:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661682229] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:41,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:41,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:40:41,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997734514] [2023-12-02 18:40:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:41,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:41,117 INFO L87 Difference]: Start difference. First operand 2840 states and 4202 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-12-02 18:40:45,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:45,576 INFO L93 Difference]: Finished difference Result 3098 states and 4357 transitions. [2023-12-02 18:40:45,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:45,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2023-12-02 18:40:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:45,582 INFO L225 Difference]: With dead ends: 3098 [2023-12-02 18:40:45,582 INFO L226 Difference]: Without dead ends: 3098 [2023-12-02 18:40:45,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:45,583 INFO L413 NwaCegarLoop]: 947 mSDtfsCounter, 1499 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:45,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1509 Valid, 2063 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1800 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:40:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2023-12-02 18:40:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2836. [2023-12-02 18:40:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2075 states have (on average 1.9971084337349398) internal successors, (4144), 2811 states have internal predecessors, (4144), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 4194 transitions. [2023-12-02 18:40:45,618 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 4194 transitions. Word has length 26 [2023-12-02 18:40:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:45,619 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 4194 transitions. [2023-12-02 18:40:45,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-12-02 18:40:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 4194 transitions. [2023-12-02 18:40:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 18:40:45,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:45,620 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, 1, 1, 1, 1, 1] [2023-12-02 18:40:45,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 18:40:45,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:45,820 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:45,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 82770444, now seen corresponding path program 1 times [2023-12-02 18:40:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [594987975] [2023-12-02 18:40:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:45,822 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 [2023-12-02 18:40:45,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:45,823 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:45,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:46,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:40:46,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:46,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:40:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:46,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:46,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:46,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [594987975] [2023-12-02 18:40:46,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [594987975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:46,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:46,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:40:46,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040106955] [2023-12-02 18:40:46,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:46,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:46,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:46,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:46,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:46,275 INFO L87 Difference]: Start difference. First operand 2836 states and 4194 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-12-02 18:40:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:53,127 INFO L93 Difference]: Finished difference Result 3478 states and 4909 transitions. [2023-12-02 18:40:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 26 [2023-12-02 18:40:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:53,136 INFO L225 Difference]: With dead ends: 3478 [2023-12-02 18:40:53,136 INFO L226 Difference]: Without dead ends: 3478 [2023-12-02 18:40:53,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:53,137 INFO L413 NwaCegarLoop]: 1271 mSDtfsCounter, 711 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 2885 SdHoareTripleChecker+Invalid, 2123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:53,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 2885 Invalid, 2123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-02 18:40:53,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2023-12-02 18:40:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2869. [2023-12-02 18:40:53,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2108 states have (on average 1.9838709677419355) internal successors, (4182), 2844 states have internal predecessors, (4182), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 4232 transitions. [2023-12-02 18:40:53,180 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 4232 transitions. Word has length 26 [2023-12-02 18:40:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:53,180 INFO L495 AbstractCegarLoop]: Abstraction has 2869 states and 4232 transitions. [2023-12-02 18:40:53,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2023-12-02 18:40:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 4232 transitions. [2023-12-02 18:40:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:40:53,182 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:53,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:53,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 18:40:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:53,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:53,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1513515108, now seen corresponding path program 1 times [2023-12-02 18:40:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:53,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878683445] [2023-12-02 18:40:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:53,384 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 [2023-12-02 18:40:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:53,385 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:53,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 18:40:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:53,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:40:53,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:53,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:40:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:53,678 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:53,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:53,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878683445] [2023-12-02 18:40:53,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878683445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:53,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:53,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:53,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728039255] [2023-12-02 18:40:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:53,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:53,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:53,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:53,680 INFO L87 Difference]: Start difference. First operand 2869 states and 4232 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:40:58,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:58,804 INFO L93 Difference]: Finished difference Result 3927 states and 5690 transitions. [2023-12-02 18:40:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:40:58,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 33 [2023-12-02 18:40:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:58,810 INFO L225 Difference]: With dead ends: 3927 [2023-12-02 18:40:58,811 INFO L226 Difference]: Without dead ends: 3927 [2023-12-02 18:40:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:40:58,811 INFO L413 NwaCegarLoop]: 1472 mSDtfsCounter, 1621 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1631 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1631 Valid, 3215 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-12-02 18:40:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3927 states. [2023-12-02 18:40:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3927 to 2866. [2023-12-02 18:40:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2108 states have (on average 1.9734345351043643) internal successors, (4160), 2841 states have internal predecessors, (4160), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:40:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4210 transitions. [2023-12-02 18:40:58,850 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4210 transitions. Word has length 33 [2023-12-02 18:40:58,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:58,850 INFO L495 AbstractCegarLoop]: Abstraction has 2866 states and 4210 transitions. [2023-12-02 18:40:58,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:40:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4210 transitions. [2023-12-02 18:40:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:40:58,851 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:58,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:58,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-02 18:40:59,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:59,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:40:59,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:59,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1513515109, now seen corresponding path program 1 times [2023-12-02 18:40:59,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:40:59,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343040991] [2023-12-02 18:40:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:59,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:40:59,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:40:59,054 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:40:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 18:40:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:59,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:40:59,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:59,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:40:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:40:59,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:59,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:40:59,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343040991] [2023-12-02 18:40:59,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343040991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:59,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:59,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:59,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544801109] [2023-12-02 18:40:59,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:59,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:59,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:40:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:40:59,470 INFO L87 Difference]: Start difference. First operand 2866 states and 4210 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:06,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:06,954 INFO L93 Difference]: Finished difference Result 4005 states and 5681 transitions. [2023-12-02 18:41:06,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:06,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 33 [2023-12-02 18:41:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:06,958 INFO L225 Difference]: With dead ends: 4005 [2023-12-02 18:41:06,958 INFO L226 Difference]: Without dead ends: 4005 [2023-12-02 18:41:06,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:06,958 INFO L413 NwaCegarLoop]: 1788 mSDtfsCounter, 1044 mSDsluCounter, 1981 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 2569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:06,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 3769 Invalid, 2569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-12-02 18:41:06,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2023-12-02 18:41:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 2866. [2023-12-02 18:41:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2108 states have (on average 1.9696394686907022) internal successors, (4152), 2841 states have internal predecessors, (4152), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:41:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4202 transitions. [2023-12-02 18:41:06,996 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4202 transitions. Word has length 33 [2023-12-02 18:41:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:06,996 INFO L495 AbstractCegarLoop]: Abstraction has 2866 states and 4202 transitions. [2023-12-02 18:41:06,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4202 transitions. [2023-12-02 18:41:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:41:06,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:06,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:07,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 18:41:07,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:07,198 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:07,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:07,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1988509404, now seen corresponding path program 1 times [2023-12-02 18:41:07,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:07,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509894667] [2023-12-02 18:41:07,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:07,199 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 [2023-12-02 18:41:07,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:07,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:07,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 18:41:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:07,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:41:07,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:07,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:41:07,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:07,441 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:07,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:07,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509894667] [2023-12-02 18:41:07,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509894667] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:07,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:07,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:41:07,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428716684] [2023-12-02 18:41:07,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:07,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:07,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:07,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:07,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:07,443 INFO L87 Difference]: Start difference. First operand 2866 states and 4202 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:12,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:12,942 INFO L93 Difference]: Finished difference Result 3907 states and 5658 transitions. [2023-12-02 18:41:12,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:12,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 33 [2023-12-02 18:41:12,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:12,945 INFO L225 Difference]: With dead ends: 3907 [2023-12-02 18:41:12,945 INFO L226 Difference]: Without dead ends: 3907 [2023-12-02 18:41:12,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:12,946 INFO L413 NwaCegarLoop]: 1470 mSDtfsCounter, 1599 mSDsluCounter, 1707 mSDsCounter, 0 mSdLazyCounter, 2374 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:12,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1609 Valid, 3177 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2374 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-12-02 18:41:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2023-12-02 18:41:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2862. [2023-12-02 18:41:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2108 states have (on average 1.9658444022770398) internal successors, (4144), 2837 states have internal predecessors, (4144), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:41:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 4194 transitions. [2023-12-02 18:41:12,974 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 4194 transitions. Word has length 33 [2023-12-02 18:41:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:12,975 INFO L495 AbstractCegarLoop]: Abstraction has 2862 states and 4194 transitions. [2023-12-02 18:41:12,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:12,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 4194 transitions. [2023-12-02 18:41:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:41:12,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:12,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:12,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 18:41:13,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:13,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:13,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1988509403, now seen corresponding path program 1 times [2023-12-02 18:41:13,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:13,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927093747] [2023-12-02 18:41:13,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:13,177 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 [2023-12-02 18:41:13,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:13,178 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:13,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 18:41:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:13,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:41:13,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:13,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:41:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:13,520 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:13,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:13,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927093747] [2023-12-02 18:41:13,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927093747] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:13,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:13,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:41:13,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219555634] [2023-12-02 18:41:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:13,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:13,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:13,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:13,522 INFO L87 Difference]: Start difference. First operand 2862 states and 4194 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:21,550 INFO L93 Difference]: Finished difference Result 3997 states and 5665 transitions. [2023-12-02 18:41:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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 33 [2023-12-02 18:41:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:21,555 INFO L225 Difference]: With dead ends: 3997 [2023-12-02 18:41:21,555 INFO L226 Difference]: Without dead ends: 3997 [2023-12-02 18:41:21,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:21,556 INFO L413 NwaCegarLoop]: 1784 mSDtfsCounter, 1036 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 3732 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:21,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 3732 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-12-02 18:41:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2023-12-02 18:41:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 2858. [2023-12-02 18:41:21,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2108 states have (on average 1.9620493358633777) internal successors, (4136), 2833 states have internal predecessors, (4136), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:41:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4186 transitions. [2023-12-02 18:41:21,608 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4186 transitions. Word has length 33 [2023-12-02 18:41:21,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:21,608 INFO L495 AbstractCegarLoop]: Abstraction has 2858 states and 4186 transitions. [2023-12-02 18:41:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 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) [2023-12-02 18:41:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4186 transitions. [2023-12-02 18:41:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:41:21,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:21,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:21,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 18:41:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:21,810 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1028453637, now seen corresponding path program 1 times [2023-12-02 18:41:21,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:21,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708035931] [2023-12-02 18:41:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:21,811 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 [2023-12-02 18:41:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:21,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:21,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 18:41:22,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:22,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:22,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:22,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:22,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:22,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708035931] [2023-12-02 18:41:22,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708035931] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:22,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:22,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:22,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498615047] [2023-12-02 18:41:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:22,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:22,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:22,052 INFO L87 Difference]: Start difference. First operand 2858 states and 4186 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2023-12-02 18:41:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:23,940 INFO L93 Difference]: Finished difference Result 2846 states and 4162 transitions. [2023-12-02 18:41:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) Word has length 40 [2023-12-02 18:41:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:23,943 INFO L225 Difference]: With dead ends: 2846 [2023-12-02 18:41:23,943 INFO L226 Difference]: Without dead ends: 2846 [2023-12-02 18:41:23,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:23,943 INFO L413 NwaCegarLoop]: 1462 mSDtfsCounter, 31 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 4358 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:23,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 4358 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:41:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2023-12-02 18:41:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2846. [2023-12-02 18:41:23,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2846 states, 2096 states have (on average 1.9618320610687023) internal successors, (4112), 2821 states have internal predecessors, (4112), 25 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 22 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-02 18:41:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2846 states to 2846 states and 4162 transitions. [2023-12-02 18:41:23,971 INFO L78 Accepts]: Start accepts. Automaton has 2846 states and 4162 transitions. Word has length 40 [2023-12-02 18:41:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:23,971 INFO L495 AbstractCegarLoop]: Abstraction has 2846 states and 4162 transitions. [2023-12-02 18:41:23,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 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) [2023-12-02 18:41:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2846 states and 4162 transitions. [2023-12-02 18:41:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 18:41:23,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:23,972 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:23,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 18:41:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:24,173 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:24,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 810867074, now seen corresponding path program 1 times [2023-12-02 18:41:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:24,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197883069] [2023-12-02 18:41:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:24,174 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 [2023-12-02 18:41:24,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:24,176 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:24,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 18:41:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:24,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:24,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:24,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:24,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:24,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197883069] [2023-12-02 18:41:24,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197883069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:24,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:24,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:41:24,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569099097] [2023-12-02 18:41:24,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:24,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:41:24,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:24,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:41:24,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:41:24,553 INFO L87 Difference]: Start difference. First operand 2846 states and 4162 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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) [2023-12-02 18:41:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:26,224 INFO L93 Difference]: Finished difference Result 4142 states and 5828 transitions. [2023-12-02 18:41:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:41:26,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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 44 [2023-12-02 18:41:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:26,229 INFO L225 Difference]: With dead ends: 4142 [2023-12-02 18:41:26,229 INFO L226 Difference]: Without dead ends: 4142 [2023-12-02 18:41:26,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:41:26,229 INFO L413 NwaCegarLoop]: 1478 mSDtfsCounter, 1073 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 2842 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:26,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1082 Valid, 2842 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 18:41:26,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2023-12-02 18:41:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 3510. [2023-12-02 18:41:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3510 states, 2756 states have (on average 1.9448476052249637) internal successors, (5360), 3478 states have internal predecessors, (5360), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 18:41:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3510 states to 3510 states and 5424 transitions. [2023-12-02 18:41:26,270 INFO L78 Accepts]: Start accepts. Automaton has 3510 states and 5424 transitions. Word has length 44 [2023-12-02 18:41:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:26,270 INFO L495 AbstractCegarLoop]: Abstraction has 3510 states and 5424 transitions. [2023-12-02 18:41:26,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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) [2023-12-02 18:41:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3510 states and 5424 transitions. [2023-12-02 18:41:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:41:26,271 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:26,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:26,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:26,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:26,472 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:26,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1264994850, now seen corresponding path program 1 times [2023-12-02 18:41:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:26,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [989241372] [2023-12-02 18:41:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:26,473 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 [2023-12-02 18:41:26,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:26,474 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:26,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 18:41:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:26,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:26,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:26,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:26,815 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [989241372] [2023-12-02 18:41:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [989241372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:26,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:26,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430862323] [2023-12-02 18:41:26,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:26,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:26,817 INFO L87 Difference]: Start difference. First operand 3510 states and 5424 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2023-12-02 18:41:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:28,821 INFO L93 Difference]: Finished difference Result 3468 states and 5354 transitions. [2023-12-02 18:41:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:28,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) Word has length 49 [2023-12-02 18:41:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:28,826 INFO L225 Difference]: With dead ends: 3468 [2023-12-02 18:41:28,827 INFO L226 Difference]: Without dead ends: 3468 [2023-12-02 18:41:28,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:28,827 INFO L413 NwaCegarLoop]: 1458 mSDtfsCounter, 33 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4344 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:28,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 4344 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 18:41:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2023-12-02 18:41:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3468. [2023-12-02 18:41:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3468 states, 2714 states have (on average 1.9491525423728813) internal successors, (5290), 3436 states have internal predecessors, (5290), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 18:41:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3468 states to 3468 states and 5354 transitions. [2023-12-02 18:41:28,866 INFO L78 Accepts]: Start accepts. Automaton has 3468 states and 5354 transitions. Word has length 49 [2023-12-02 18:41:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:28,867 INFO L495 AbstractCegarLoop]: Abstraction has 3468 states and 5354 transitions. [2023-12-02 18:41:28,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 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) [2023-12-02 18:41:28,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3468 states and 5354 transitions. [2023-12-02 18:41:28,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 18:41:28,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:28,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:28,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:29,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:29,068 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:29,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:29,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1147654709, now seen corresponding path program 1 times [2023-12-02 18:41:29,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:29,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115880953] [2023-12-02 18:41:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:29,070 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 [2023-12-02 18:41:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:29,071 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:29,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 18:41:29,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:29,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:29,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:29,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:29,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:29,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115880953] [2023-12-02 18:41:29,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115880953] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556696693] [2023-12-02 18:41:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:29,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:29,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:29,426 INFO L87 Difference]: Start difference. First operand 3468 states and 5354 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2023-12-02 18:41:31,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:31,306 INFO L93 Difference]: Finished difference Result 3450 states and 5324 transitions. [2023-12-02 18:41:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:31,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) Word has length 52 [2023-12-02 18:41:31,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:31,311 INFO L225 Difference]: With dead ends: 3450 [2023-12-02 18:41:31,311 INFO L226 Difference]: Without dead ends: 3450 [2023-12-02 18:41:31,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:31,312 INFO L413 NwaCegarLoop]: 1454 mSDtfsCounter, 23 mSDsluCounter, 2888 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 4342 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:31,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 4342 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:41:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2023-12-02 18:41:31,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3450. [2023-12-02 18:41:31,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3450 states, 2696 states have (on average 1.9510385756676558) internal successors, (5260), 3418 states have internal predecessors, (5260), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 18:41:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3450 states to 3450 states and 5324 transitions. [2023-12-02 18:41:31,352 INFO L78 Accepts]: Start accepts. Automaton has 3450 states and 5324 transitions. Word has length 52 [2023-12-02 18:41:31,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:31,352 INFO L495 AbstractCegarLoop]: Abstraction has 3450 states and 5324 transitions. [2023-12-02 18:41:31,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 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) [2023-12-02 18:41:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3450 states and 5324 transitions. [2023-12-02 18:41:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:41:31,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:31,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:31,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 18:41:31,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:31,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:31,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:31,553 INFO L85 PathProgramCache]: Analyzing trace with hash -543350673, now seen corresponding path program 1 times [2023-12-02 18:41:31,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:31,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88922766] [2023-12-02 18:41:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:31,554 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 [2023-12-02 18:41:31,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:31,554 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:31,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 18:41:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:31,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:41:31,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:31,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:41:31,796 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:41:31,797 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:41:31,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2023-12-02 18:41:31,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:41:31,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2023-12-02 18:41:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:31,897 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:31,898 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:31,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88922766] [2023-12-02 18:41:31,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88922766] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:31,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:31,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237535266] [2023-12-02 18:41:31,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:31,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:31,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:31,900 INFO L87 Difference]: Start difference. First operand 3450 states and 5324 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:41:34,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:34,613 INFO L93 Difference]: Finished difference Result 3422 states and 5295 transitions. [2023-12-02 18:41:34,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:34,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-02 18:41:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:34,619 INFO L225 Difference]: With dead ends: 3422 [2023-12-02 18:41:34,619 INFO L226 Difference]: Without dead ends: 3422 [2023-12-02 18:41:34,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:34,620 INFO L413 NwaCegarLoop]: 1467 mSDtfsCounter, 4 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4290 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:34,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 4290 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 18:41:34,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2023-12-02 18:41:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 3419. [2023-12-02 18:41:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 2665 states have (on average 1.9617260787992494) internal successors, (5228), 3387 states have internal predecessors, (5228), 32 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2023-12-02 18:41:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 5292 transitions. [2023-12-02 18:41:34,666 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 5292 transitions. Word has length 55 [2023-12-02 18:41:34,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:34,666 INFO L495 AbstractCegarLoop]: Abstraction has 3419 states and 5292 transitions. [2023-12-02 18:41:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 18:41:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 5292 transitions. [2023-12-02 18:41:34,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 18:41:34,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:34,667 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:34,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:34,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:34,867 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:34,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash 384073216, now seen corresponding path program 1 times [2023-12-02 18:41:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [272112476] [2023-12-02 18:41:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:34,869 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 [2023-12-02 18:41:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:34,870 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:34,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 18:41:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:35,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:41:35,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:35,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:35,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:35,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [272112476] [2023-12-02 18:41:35,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [272112476] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:35,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:35,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:41:35,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998958540] [2023-12-02 18:41:35,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:35,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:41:35,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:35,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:41:35,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:41:35,375 INFO L87 Difference]: Start difference. First operand 3419 states and 5292 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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) [2023-12-02 18:41:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:37,131 INFO L93 Difference]: Finished difference Result 4549 states and 6755 transitions. [2023-12-02 18:41:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:41:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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) Word has length 53 [2023-12-02 18:41:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:37,137 INFO L225 Difference]: With dead ends: 4549 [2023-12-02 18:41:37,137 INFO L226 Difference]: Without dead ends: 4549 [2023-12-02 18:41:37,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:41:37,138 INFO L413 NwaCegarLoop]: 1688 mSDtfsCounter, 790 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 3043 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:37,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 3043 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 18:41:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4549 states. [2023-12-02 18:41:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4549 to 4204. [2023-12-02 18:41:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4204 states, 3444 states have (on average 1.9337979094076656) internal successors, (6660), 4163 states have internal predecessors, (6660), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:41:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4204 states to 4204 states and 6742 transitions. [2023-12-02 18:41:37,183 INFO L78 Accepts]: Start accepts. Automaton has 4204 states and 6742 transitions. Word has length 53 [2023-12-02 18:41:37,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:37,184 INFO L495 AbstractCegarLoop]: Abstraction has 4204 states and 6742 transitions. [2023-12-02 18:41:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 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) [2023-12-02 18:41:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4204 states and 6742 transitions. [2023-12-02 18:41:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:41:37,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:37,185 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:37,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:37,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:37,385 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:37,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash 25742039, now seen corresponding path program 1 times [2023-12-02 18:41:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:37,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897805465] [2023-12-02 18:41:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:37,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:37,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:37,388 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:37,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 18:41:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:37,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:41:37,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:37,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:41:37,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:41:38,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:41:38,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:41:38,151 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:41:38,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:41:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:38,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:38,162 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:38,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897805465] [2023-12-02 18:41:38,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897805465] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:38,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:38,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:41:38,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440512799] [2023-12-02 18:41:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:38,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:41:38,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:41:38,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:38,163 INFO L87 Difference]: Start difference. First operand 4204 states and 6742 transitions. Second operand has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 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) [2023-12-02 18:41:43,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:43,921 INFO L93 Difference]: Finished difference Result 5976 states and 9496 transitions. [2023-12-02 18:41:43,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:41:43,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 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) Word has length 56 [2023-12-02 18:41:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:43,928 INFO L225 Difference]: With dead ends: 5976 [2023-12-02 18:41:43,928 INFO L226 Difference]: Without dead ends: 5976 [2023-12-02 18:41:43,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:41:43,929 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 3660 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3674 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 1675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:43,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3674 Valid, 823 Invalid, 1675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-02 18:41:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2023-12-02 18:41:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 3999. [2023-12-02 18:41:43,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3323 states have (on average 1.8399037014745712) internal successors, (6114), 3958 states have internal predecessors, (6114), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:41:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 6196 transitions. [2023-12-02 18:41:43,980 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 6196 transitions. Word has length 56 [2023-12-02 18:41:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:43,981 INFO L495 AbstractCegarLoop]: Abstraction has 3999 states and 6196 transitions. [2023-12-02 18:41:43,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 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) [2023-12-02 18:41:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 6196 transitions. [2023-12-02 18:41:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:41:43,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:43,982 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:43,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 18:41:44,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:44,182 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr396REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:44,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1423239350, now seen corresponding path program 1 times [2023-12-02 18:41:44,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:44,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837231445] [2023-12-02 18:41:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:44,183 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 [2023-12-02 18:41:44,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:44,184 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:44,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-12-02 18:41:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:44,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:41:44,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:44,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:41:44,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:41:44,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:41:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:44,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:44,506 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:44,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837231445] [2023-12-02 18:41:44,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837231445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:44,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:44,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663838051] [2023-12-02 18:41:44,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:44,508 INFO L87 Difference]: Start difference. First operand 3999 states and 6196 transitions. Second operand has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:41:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:49,283 INFO L93 Difference]: Finished difference Result 3998 states and 6192 transitions. [2023-12-02 18:41:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:41:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2023-12-02 18:41:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:49,288 INFO L225 Difference]: With dead ends: 3998 [2023-12-02 18:41:49,288 INFO L226 Difference]: Without dead ends: 3998 [2023-12-02 18:41:49,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:41:49,289 INFO L413 NwaCegarLoop]: 1382 mSDtfsCounter, 3 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 2446 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:49,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3789 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2446 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 18:41:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2023-12-02 18:41:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 3998. [2023-12-02 18:41:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3998 states, 3323 states have (on average 1.8386999699067108) internal successors, (6110), 3957 states have internal predecessors, (6110), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:41:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6192 transitions. [2023-12-02 18:41:49,341 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6192 transitions. Word has length 60 [2023-12-02 18:41:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:49,342 INFO L495 AbstractCegarLoop]: Abstraction has 3998 states and 6192 transitions. [2023-12-02 18:41:49,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:41:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6192 transitions. [2023-12-02 18:41:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:41:49,343 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:49,343 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:49,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:49,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:49,544 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:49,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1423239349, now seen corresponding path program 1 times [2023-12-02 18:41:49,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:49,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137327874] [2023-12-02 18:41:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:49,545 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 [2023-12-02 18:41:49,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:49,546 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:49,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 18:41:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:49,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:41:49,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:49,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:41:49,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:41:49,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:41:49,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-12-02 18:41:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:49,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:49,990 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:49,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137327874] [2023-12-02 18:41:49,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137327874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:49,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:49,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:49,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709609036] [2023-12-02 18:41:49,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:49,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:49,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:49,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:49,991 INFO L87 Difference]: Start difference. First operand 3998 states and 6192 transitions. Second operand has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:41:56,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:56,883 INFO L93 Difference]: Finished difference Result 3997 states and 6188 transitions. [2023-12-02 18:41:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:41:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2023-12-02 18:41:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:56,888 INFO L225 Difference]: With dead ends: 3997 [2023-12-02 18:41:56,889 INFO L226 Difference]: Without dead ends: 3997 [2023-12-02 18:41:56,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:41:56,889 INFO L413 NwaCegarLoop]: 1382 mSDtfsCounter, 1 mSDsluCounter, 2380 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3762 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:56,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3762 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2023-12-02 18:41:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2023-12-02 18:41:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3997. [2023-12-02 18:41:56,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3319 states have (on average 1.839710756251883) internal successors, (6106), 3956 states have internal predecessors, (6106), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:41:56,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6188 transitions. [2023-12-02 18:41:56,951 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6188 transitions. Word has length 60 [2023-12-02 18:41:56,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:56,951 INFO L495 AbstractCegarLoop]: Abstraction has 3997 states and 6188 transitions. [2023-12-02 18:41:56,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:41:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6188 transitions. [2023-12-02 18:41:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:41:56,952 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:56,952 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:56,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-12-02 18:41:57,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:57,153 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr78REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:41:57,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1301050154, now seen corresponding path program 1 times [2023-12-02 18:41:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:41:57,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229705860] [2023-12-02 18:41:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:57,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:41:57,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:41:57,155 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:41:57,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 18:41:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:57,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:41:57,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:57,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:41:57,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:41:57,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 18:41:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:41:57,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:41:57,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:41:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229705860] [2023-12-02 18:41:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229705860] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:41:57,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:41:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:41:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631711390] [2023-12-02 18:41:57,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:41:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:41:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:41:57,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:41:57,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:41:57,570 INFO L87 Difference]: Start difference. First operand 3997 states and 6188 transitions. Second operand has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:42:02,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:02,588 INFO L93 Difference]: Finished difference Result 3996 states and 6185 transitions. [2023-12-02 18:42:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:02,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2023-12-02 18:42:02,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:02,592 INFO L225 Difference]: With dead ends: 3996 [2023-12-02 18:42:02,592 INFO L226 Difference]: Without dead ends: 3996 [2023-12-02 18:42:02,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:42:02,592 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 3 mSDsluCounter, 2404 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3784 SdHoareTripleChecker+Invalid, 2444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:02,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3784 Invalid, 2444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-02 18:42:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2023-12-02 18:42:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3996. [2023-12-02 18:42:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3996 states, 3319 states have (on average 1.8388068695390178) internal successors, (6103), 3955 states have internal predecessors, (6103), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:42:02,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3996 states to 3996 states and 6185 transitions. [2023-12-02 18:42:02,650 INFO L78 Accepts]: Start accepts. Automaton has 3996 states and 6185 transitions. Word has length 60 [2023-12-02 18:42:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:02,650 INFO L495 AbstractCegarLoop]: Abstraction has 3996 states and 6185 transitions. [2023-12-02 18:42:02,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:42:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 3996 states and 6185 transitions. [2023-12-02 18:42:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-02 18:42:02,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:02,651 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:02,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 18:42:02,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:42:02,852 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr79REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:02,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1301050153, now seen corresponding path program 1 times [2023-12-02 18:42:02,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:02,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389287262] [2023-12-02 18:42:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:02,853 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 [2023-12-02 18:42:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:02,854 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:02,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 18:42:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:03,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:42:03,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:03,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:42:03,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:42:03,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:42:03,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-12-02 18:42:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:03,313 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:03,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:03,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389287262] [2023-12-02 18:42:03,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389287262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:03,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:03,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:42:03,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951924601] [2023-12-02 18:42:03,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:03,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:42:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:42:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:42:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:42:03,316 INFO L87 Difference]: Start difference. First operand 3996 states and 6185 transitions. Second operand has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:42:10,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:10,348 INFO L93 Difference]: Finished difference Result 3995 states and 6182 transitions. [2023-12-02 18:42:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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 60 [2023-12-02 18:42:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:10,353 INFO L225 Difference]: With dead ends: 3995 [2023-12-02 18:42:10,353 INFO L226 Difference]: Without dead ends: 3995 [2023-12-02 18:42:10,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:42:10,354 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1 mSDsluCounter, 2377 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3757 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:10,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3757 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 18:42:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2023-12-02 18:42:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 3995. [2023-12-02 18:42:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3995 states, 3316 states have (on average 1.8395657418576599) internal successors, (6100), 3954 states have internal predecessors, (6100), 41 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2023-12-02 18:42:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3995 states to 3995 states and 6182 transitions. [2023-12-02 18:42:10,398 INFO L78 Accepts]: Start accepts. Automaton has 3995 states and 6182 transitions. Word has length 60 [2023-12-02 18:42:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:10,399 INFO L495 AbstractCegarLoop]: Abstraction has 3995 states and 6182 transitions. [2023-12-02 18:42:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 15.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2023-12-02 18:42:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3995 states and 6182 transitions. [2023-12-02 18:42:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 18:42:10,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:10,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:10,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-12-02 18:42:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:42:10,600 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:10,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash -210881968, now seen corresponding path program 1 times [2023-12-02 18:42:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:10,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675269651] [2023-12-02 18:42:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:10,601 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 [2023-12-02 18:42:10,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:10,602 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-12-02 18:42:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:10,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:42:10,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:10,974 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:10,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:10,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675269651] [2023-12-02 18:42:10,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675269651] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:10,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:42:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455646846] [2023-12-02 18:42:10,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:10,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:42:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:42:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:42:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:42:10,976 INFO L87 Difference]: Start difference. First operand 3995 states and 6182 transitions. Second operand has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:42:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:12,471 INFO L93 Difference]: Finished difference Result 3997 states and 6190 transitions. [2023-12-02 18:42:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:42:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-12-02 18:42:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:12,479 INFO L225 Difference]: With dead ends: 3997 [2023-12-02 18:42:12,479 INFO L226 Difference]: Without dead ends: 3997 [2023-12-02 18:42:12,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:42:12,480 INFO L413 NwaCegarLoop]: 1379 mSDtfsCounter, 1 mSDsluCounter, 2752 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4131 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:12,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4131 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 18:42:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2023-12-02 18:42:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3997. [2023-12-02 18:42:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3997 states, 3317 states have (on average 1.8396141091347604) internal successors, (6102), 3956 states have internal predecessors, (6102), 41 states have call successors, (41), 3 states have call predecessors, (41), 4 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2023-12-02 18:42:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3997 states to 3997 states and 6190 transitions. [2023-12-02 18:42:12,533 INFO L78 Accepts]: Start accepts. Automaton has 3997 states and 6190 transitions. Word has length 66 [2023-12-02 18:42:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:12,534 INFO L495 AbstractCegarLoop]: Abstraction has 3997 states and 6190 transitions. [2023-12-02 18:42:12,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.333333333333332) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:42:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3997 states and 6190 transitions. [2023-12-02 18:42:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 18:42:12,535 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:12,535 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:12,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-12-02 18:42:12,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:42:12,735 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:12,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash 629361287, now seen corresponding path program 1 times [2023-12-02 18:42:12,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:12,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439137508] [2023-12-02 18:42:12,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:12,736 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 [2023-12-02 18:42:12,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:12,737 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:12,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 18:42:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:13,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:42:13,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:13,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:13,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:13,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439137508] [2023-12-02 18:42:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439137508] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1070458155] [2023-12-02 18:42:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:42:13,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:42:13,143 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:42:13,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 18:42:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:13,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:42:13,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:13,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:13,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1070458155] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:13,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351737546] [2023-12-02 18:42:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:13,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:13,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:13,862 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:13,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 18:42:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:14,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:42:14,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:14,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:14,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:14,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351737546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:14,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:42:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 18:42:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199075582] [2023-12-02 18:42:14,302 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:42:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:42:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:42:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:42:14,303 INFO L87 Difference]: Start difference. First operand 3997 states and 6190 transitions. Second operand has 8 states, 6 states have (on average 11.333333333333334) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:42:17,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:17,354 INFO L93 Difference]: Finished difference Result 4006 states and 6209 transitions. [2023-12-02 18:42:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:42:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 11.333333333333334) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2023-12-02 18:42:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:17,362 INFO L225 Difference]: With dead ends: 4006 [2023-12-02 18:42:17,362 INFO L226 Difference]: Without dead ends: 4006 [2023-12-02 18:42:17,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:42:17,363 INFO L413 NwaCegarLoop]: 1377 mSDtfsCounter, 6 mSDsluCounter, 5494 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6871 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:17,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6871 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 18:42:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2023-12-02 18:42:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 4005. [2023-12-02 18:42:17,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4005 states, 3324 states have (on average 1.8396510228640193) internal successors, (6115), 3963 states have internal predecessors, (6115), 41 states have call successors, (41), 4 states have call predecessors, (41), 5 states have return successors, (47), 38 states have call predecessors, (47), 41 states have call successors, (47) [2023-12-02 18:42:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4005 states to 4005 states and 6203 transitions. [2023-12-02 18:42:17,412 INFO L78 Accepts]: Start accepts. Automaton has 4005 states and 6203 transitions. Word has length 67 [2023-12-02 18:42:17,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:17,412 INFO L495 AbstractCegarLoop]: Abstraction has 4005 states and 6203 transitions. [2023-12-02 18:42:17,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 11.333333333333334) internal successors, (68), 8 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:42:17,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4005 states and 6203 transitions. [2023-12-02 18:42:17,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 18:42:17,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:17,414 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:17,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 18:42:17,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-12-02 18:42:17,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2023-12-02 18:42:18,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:42:18,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:18,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:18,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1544423440, now seen corresponding path program 2 times [2023-12-02 18:42:18,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:18,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711018399] [2023-12-02 18:42:18,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:42:18,016 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 [2023-12-02 18:42:18,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:18,017 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:18,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-12-02 18:42:18,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 18:42:18,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:18,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:42:18,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:18,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:42:18,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:42:18,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:42:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:42:18,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2023-12-02 18:42:18,524 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:42:18,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:42:18,632 INFO L378 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 47 treesize of output 36 [2023-12-02 18:42:18,707 INFO L378 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 47 treesize of output 36 [2023-12-02 18:42:18,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:42:18,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 26 [2023-12-02 18:42:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:42:18,778 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:42:18,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:18,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711018399] [2023-12-02 18:42:18,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711018399] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:42:18,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:42:18,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:42:18,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087814562] [2023-12-02 18:42:18,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:42:18,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:42:18,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:42:18,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:42:18,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:42:18,780 INFO L87 Difference]: Start difference. First operand 4005 states and 6203 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:42:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:25,521 INFO L93 Difference]: Finished difference Result 3879 states and 5810 transitions. [2023-12-02 18:42:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:42:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-12-02 18:42:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:25,531 INFO L225 Difference]: With dead ends: 3879 [2023-12-02 18:42:25,531 INFO L226 Difference]: Without dead ends: 3879 [2023-12-02 18:42:25,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:42:25,532 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 1575 mSDsluCounter, 1893 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:25,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 2740 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-12-02 18:42:25,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3879 states. [2023-12-02 18:42:25,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3879 to 3660. [2023-12-02 18:42:25,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3660 states, 2980 states have (on average 1.8724832214765101) internal successors, (5580), 3621 states have internal predecessors, (5580), 38 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:42:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3660 states to 3660 states and 5661 transitions. [2023-12-02 18:42:25,578 INFO L78 Accepts]: Start accepts. Automaton has 3660 states and 5661 transitions. Word has length 70 [2023-12-02 18:42:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:25,578 INFO L495 AbstractCegarLoop]: Abstraction has 3660 states and 5661 transitions. [2023-12-02 18:42:25,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:42:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3660 states and 5661 transitions. [2023-12-02 18:42:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-02 18:42:25,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:25,579 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:25,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2023-12-02 18:42:25,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:42:25,780 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:25,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 118151196, now seen corresponding path program 1 times [2023-12-02 18:42:25,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:25,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614354907] [2023-12-02 18:42:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:25,781 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 [2023-12-02 18:42:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:25,782 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:25,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 18:42:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:26,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:42:26,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:26,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:26,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614354907] [2023-12-02 18:42:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614354907] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467574401] [2023-12-02 18:42:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:42:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:42:26,456 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:42:26,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 18:42:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:27,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:42:27,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:27,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467574401] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788483864] [2023-12-02 18:42:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:27,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:27,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:27,334 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:27,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 18:42:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:27,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:42:27,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:27,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:28,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788483864] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:28,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:42:28,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2023-12-02 18:42:28,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139612168] [2023-12-02 18:42:28,137 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:28,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:42:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:42:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:42:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2023-12-02 18:42:28,139 INFO L87 Difference]: Start difference. First operand 3660 states and 5661 transitions. Second operand has 20 states, 17 states have (on average 4.764705882352941) internal successors, (81), 20 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:42:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:33,201 INFO L93 Difference]: Finished difference Result 3675 states and 5694 transitions. [2023-12-02 18:42:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:42:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.764705882352941) internal successors, (81), 20 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2023-12-02 18:42:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:33,210 INFO L225 Difference]: With dead ends: 3675 [2023-12-02 18:42:33,210 INFO L226 Difference]: Without dead ends: 3672 [2023-12-02 18:42:33,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=774, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 18:42:33,212 INFO L413 NwaCegarLoop]: 1375 mSDtfsCounter, 13 mSDsluCounter, 10976 mSDsCounter, 0 mSdLazyCounter, 1864 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12351 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:33,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12351 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1864 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-12-02 18:42:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2023-12-02 18:42:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3669. [2023-12-02 18:42:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3669 states, 2989 states have (on average 1.8705252592840416) internal successors, (5591), 3630 states have internal predecessors, (5591), 38 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:42:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 5672 transitions. [2023-12-02 18:42:33,257 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 5672 transitions. Word has length 70 [2023-12-02 18:42:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:33,257 INFO L495 AbstractCegarLoop]: Abstraction has 3669 states and 5672 transitions. [2023-12-02 18:42:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.764705882352941) internal successors, (81), 20 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:42:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 5672 transitions. [2023-12-02 18:42:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 18:42:33,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:33,258 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:33,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 18:42:33,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 18:42:33,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 18:42:33,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:33,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr82REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:42:33,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1620782524, now seen corresponding path program 2 times [2023-12-02 18:42:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:42:33,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265257869] [2023-12-02 18:42:33,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:42:33,861 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 [2023-12-02 18:42:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:42:33,862 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:42:33,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 18:42:34,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:42:34,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:34,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:42:34,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:34,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:35,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:42:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265257869] [2023-12-02 18:42:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265257869] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:35,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1860994284] [2023-12-02 18:42:35,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:42:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:42:35,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:42:35,606 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:42:35,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 18:42:37,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:42:37,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:37,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:42:37,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:37,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:37,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:42:37,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1860994284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:37,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045995260] [2023-12-02 18:42:37,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:42:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:37,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:37,532 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:37,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 18:43:07,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:43:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:43:07,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 18:43:07,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:07,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:43:07,779 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:43:07,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:43:07,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:43:08,286 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:43:08,287 INFO L378 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 44 treesize of output 43 [2023-12-02 18:43:08,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:43:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 18:43:08,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:08,550 INFO L349 Elim1Store]: treesize reduction 7, result has 63.2 percent of original size [2023-12-02 18:43:08,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-12-02 18:43:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045995260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:08,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2023-12-02 18:43:08,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 10] total 35 [2023-12-02 18:43:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710940135] [2023-12-02 18:43:08,700 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:08,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 18:43:08,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:08,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 18:43:08,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1100, Unknown=11, NotChecked=0, Total=1332 [2023-12-02 18:43:08,701 INFO L87 Difference]: Start difference. First operand 3669 states and 5672 transitions. Second operand has 35 states, 32 states have (on average 4.65625) internal successors, (149), 34 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:43:43,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:43,812 INFO L93 Difference]: Finished difference Result 5511 states and 8763 transitions. [2023-12-02 18:43:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 18:43:43,813 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 4.65625) internal successors, (149), 34 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 76 [2023-12-02 18:43:43,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:43,824 INFO L225 Difference]: With dead ends: 5511 [2023-12-02 18:43:43,825 INFO L226 Difference]: Without dead ends: 5508 [2023-12-02 18:43:43,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1137, Invalid=5169, Unknown=14, NotChecked=0, Total=6320 [2023-12-02 18:43:43,828 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 1482 mSDsluCounter, 15823 mSDsCounter, 0 mSdLazyCounter, 18104 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 16603 SdHoareTripleChecker+Invalid, 18196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 18104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:43,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1523 Valid, 16603 Invalid, 18196 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [92 Valid, 18104 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2023-12-02 18:43:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2023-12-02 18:43:43,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3686. [2023-12-02 18:43:43,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3686 states, 3007 states have (on average 1.865979381443299) internal successors, (5611), 3647 states have internal predecessors, (5611), 38 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:43:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 5692 transitions. [2023-12-02 18:43:43,899 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 5692 transitions. Word has length 76 [2023-12-02 18:43:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:43,900 INFO L495 AbstractCegarLoop]: Abstraction has 3686 states and 5692 transitions. [2023-12-02 18:43:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 4.65625) internal successors, (149), 34 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:43:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 5692 transitions. [2023-12-02 18:43:43,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:43:43,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:43,901 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:43,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 18:43:44,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 18:43:44,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 18:43:44,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:43:44,502 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:43:44,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash -463884035, now seen corresponding path program 1 times [2023-12-02 18:43:44,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:43:44,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994291510] [2023-12-02 18:43:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:44,503 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 [2023-12-02 18:43:44,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:43:44,504 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:43:44,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 18:43:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:45,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:43:45,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:45,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:46,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:43:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994291510] [2023-12-02 18:43:46,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994291510] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:46,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1886551027] [2023-12-02 18:43:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:46,822 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:43:46,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:43:46,823 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:43:46,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 18:43:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:47,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 18:43:47,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:47,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:48,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1886551027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634595879] [2023-12-02 18:43:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:48,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:48,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:48,024 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:48,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 18:43:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:48,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:43:48,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:48,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:43:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:43:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634595879] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:43:51,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:43:51,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 74 [2023-12-02 18:43:51,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048724649] [2023-12-02 18:43:51,970 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:43:51,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-12-02 18:43:51,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:43:51,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-12-02 18:43:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=3789, Unknown=0, NotChecked=0, Total=5402 [2023-12-02 18:43:51,974 INFO L87 Difference]: Start difference. First operand 3686 states and 5692 transitions. Second operand has 74 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 74 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:44:21,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:44:21,843 INFO L93 Difference]: Finished difference Result 3744 states and 5859 transitions. [2023-12-02 18:44:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-12-02 18:44:21,844 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 74 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 88 [2023-12-02 18:44:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:44:21,850 INFO L225 Difference]: With dead ends: 3744 [2023-12-02 18:44:21,850 INFO L226 Difference]: Without dead ends: 3741 [2023-12-02 18:44:21,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=6091, Invalid=13369, Unknown=0, NotChecked=0, Total=19460 [2023-12-02 18:44:21,859 INFO L413 NwaCegarLoop]: 1374 mSDtfsCounter, 50 mSDsluCounter, 39766 mSDsCounter, 0 mSdLazyCounter, 8441 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41140 SdHoareTripleChecker+Invalid, 8606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 8441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:44:21,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 41140 Invalid, 8606 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [165 Valid, 8441 Invalid, 0 Unknown, 0 Unchecked, 22.0s Time] [2023-12-02 18:44:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2023-12-02 18:44:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 3722. [2023-12-02 18:44:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3722 states, 3043 states have (on average 1.8596779493920472) internal successors, (5659), 3683 states have internal predecessors, (5659), 38 states have call successors, (38), 4 states have call predecessors, (38), 5 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:44:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3722 states to 3722 states and 5740 transitions. [2023-12-02 18:44:21,922 INFO L78 Accepts]: Start accepts. Automaton has 3722 states and 5740 transitions. Word has length 88 [2023-12-02 18:44:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:44:21,922 INFO L495 AbstractCegarLoop]: Abstraction has 3722 states and 5740 transitions. [2023-12-02 18:44:21,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 74 states have internal predecessors, (135), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:44:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3722 states and 5740 transitions. [2023-12-02 18:44:21,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-02 18:44:21,923 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:44:21,923 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:44:21,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-12-02 18:44:22,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2023-12-02 18:44:22,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 18:44:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:22,525 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr83REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:44:22,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:44:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1399786909, now seen corresponding path program 2 times [2023-12-02 18:44:22,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:44:22,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1626597417] [2023-12-02 18:44:22,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:22,526 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 [2023-12-02 18:44:22,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:44:22,528 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:44:22,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 18:44:23,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:23,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:23,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 109 conjunts are in the unsatisfiable core [2023-12-02 18:44:23,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:23,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:23,903 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:23,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:23,915 INFO L378 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 6 treesize of output 5 [2023-12-02 18:44:23,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:44:23,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:24,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-12-02 18:44:24,081 INFO L378 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 [2023-12-02 18:44:24,902 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:24,902 INFO L378 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 [2023-12-02 18:44:24,914 INFO L378 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 [2023-12-02 18:44:24,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:44:24,967 INFO L378 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 [2023-12-02 18:44:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:44:24,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:26,699 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_4238 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4237 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4238) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4237) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (forall ((v_ArrVal_4238 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4238) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32))))))) is different from false [2023-12-02 18:44:26,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:44:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1626597417] [2023-12-02 18:44:26,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1626597417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:26,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1075755350] [2023-12-02 18:44:26,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:26,706 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:44:26,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:44:26,707 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:44:26,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 18:44:29,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:44:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:44:29,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 110 conjunts are in the unsatisfiable core [2023-12-02 18:44:29,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:44:29,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:44:29,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:44:30,007 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:44:30,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:44:30,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:44:30,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:44:30,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-12-02 18:44:30,094 INFO L378 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 [2023-12-02 18:44:30,843 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:44:30,844 INFO L378 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 [2023-12-02 18:44:30,856 INFO L378 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 [2023-12-02 18:44:30,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:44:30,910 INFO L378 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 [2023-12-02 18:44:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:44:30,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:44:32,443 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_4791 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4792 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4792) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4791) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (forall ((v_ArrVal_4792 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_4792) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (bvule (bvadd (_ bv16 32) .cse1) (bvadd .cse1 (_ bv20 32))))))) is different from false [2023-12-02 18:44:32,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1075755350] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:44:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642310140] [2023-12-02 18:44:32,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:44:32,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:44:32,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:44:32,450 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:44:32,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 18:45:08,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:45:08,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:45:09,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 107 conjunts are in the unsatisfiable core [2023-12-02 18:45:09,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:09,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:45:09,214 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:45:09,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:45:09,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:45:09,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:45:09,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-02 18:45:09,455 INFO L378 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 9 treesize of output 3 [2023-12-02 18:45:10,232 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:45:10,233 INFO L378 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 62 treesize of output 57 [2023-12-02 18:45:10,248 INFO L378 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 30 treesize of output 13 [2023-12-02 18:45:10,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 18:45:10,359 INFO L378 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 9 treesize of output 3 [2023-12-02 18:45:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:45:10,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:11,944 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_5345 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_5345) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv16 32) .cse0) (bvadd .cse0 (_ bv20 32))))) (forall ((v_ArrVal_5344 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5345 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_5345) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_5344) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2023-12-02 18:45:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642310140] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:11,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:45:11,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-12-02 18:45:11,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747495778] [2023-12-02 18:45:11,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:45:11,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 18:45:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:45:11,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 18:45:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=173, Unknown=3, NotChecked=84, Total=306 [2023-12-02 18:45:11,953 INFO L87 Difference]: Start difference. First operand 3722 states and 5740 transitions. Second operand has 13 states, 10 states have (on average 12.4) internal successors, (124), 13 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:45:34,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:45:34,509 INFO L93 Difference]: Finished difference Result 7593 states and 11897 transitions. [2023-12-02 18:45:34,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:45:34,510 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 12.4) internal successors, (124), 13 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2023-12-02 18:45:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:45:34,520 INFO L225 Difference]: With dead ends: 7593 [2023-12-02 18:45:34,520 INFO L226 Difference]: Without dead ends: 7591 [2023-12-02 18:45:34,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 318 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=272, Unknown=3, NotChecked=108, Total=462 [2023-12-02 18:45:34,521 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 3780 mSDsluCounter, 4305 mSDsCounter, 0 mSdLazyCounter, 9324 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3796 SdHoareTripleChecker+Valid, 5121 SdHoareTripleChecker+Invalid, 9361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 9324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:45:34,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3796 Valid, 5121 Invalid, 9361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 9324 Invalid, 0 Unknown, 0 Unchecked, 22.2s Time] [2023-12-02 18:45:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2023-12-02 18:45:34,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 3770. [2023-12-02 18:45:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3770 states, 3091 states have (on average 1.8460045292785505) internal successors, (5706), 3730 states have internal predecessors, (5706), 38 states have call successors, (38), 5 states have call predecessors, (38), 6 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:45:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3770 states to 3770 states and 5787 transitions. [2023-12-02 18:45:34,576 INFO L78 Accepts]: Start accepts. Automaton has 3770 states and 5787 transitions. Word has length 110 [2023-12-02 18:45:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:45:34,576 INFO L495 AbstractCegarLoop]: Abstraction has 3770 states and 5787 transitions. [2023-12-02 18:45:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 12.4) internal successors, (124), 13 states have internal predecessors, (124), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:45:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3770 states and 5787 transitions. [2023-12-02 18:45:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:45:34,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:45:34,577 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:45:34,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2023-12-02 18:45:34,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 18:45:35,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 18:45:35,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:35,179 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr86REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:45:35,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:45:35,179 INFO L85 PathProgramCache]: Analyzing trace with hash 873525263, now seen corresponding path program 1 times [2023-12-02 18:45:35,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:45:35,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233388139] [2023-12-02 18:45:35,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:35,180 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 [2023-12-02 18:45:35,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:45:35,181 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:45:35,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 18:45:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:36,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 18:45:36,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:36,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:45:36,304 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:45:36,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:45:36,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:45:36,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:45:37,452 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:45:37,453 INFO L378 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 44 treesize of output 43 [2023-12-02 18:45:37,566 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:45:37,566 INFO L378 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 44 treesize of output 43 [2023-12-02 18:45:37,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:45:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:45:37,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:37,698 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5769 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_5769) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:45:38,174 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5815 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_5769 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_5815))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_5769)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:45:38,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:45:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233388139] [2023-12-02 18:45:38,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233388139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:38,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1923993029] [2023-12-02 18:45:38,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:38,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:45:38,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:45:38,178 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:45:38,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 18:45:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:41,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 18:45:41,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:41,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:45:41,516 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:45:41,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:45:41,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:45:41,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 18:45:42,641 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:42,642 INFO L378 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 36 treesize of output 35 [2023-12-02 18:45:42,823 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:45:42,824 INFO L378 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 36 treesize of output 35 [2023-12-02 18:45:42,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:45:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:45:42,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:44,954 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6240 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_6240) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (_ bv1 1)))) is different from false [2023-12-02 18:45:45,428 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6240 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6286 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_6286))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_6240)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:45:45,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1923993029] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:45,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681025958] [2023-12-02 18:45:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:45:45,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:45:45,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:45:45,433 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:45:45,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 18:45:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:45:46,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-02 18:45:46,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:45:46,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:45:46,412 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:45:46,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:45:46,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:45:46,931 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:45:46,931 INFO L378 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 31 treesize of output 32 [2023-12-02 18:45:47,034 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:45:47,035 INFO L378 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 44 treesize of output 43 [2023-12-02 18:45:49,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:45:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:45:49,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:45:49,153 INFO L349 Elim1Store]: treesize reduction 7, result has 63.2 percent of original size [2023-12-02 18:45:49,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-12-02 18:45:49,285 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6709 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_6709) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))))) is different from false [2023-12-02 18:45:49,739 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6755 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_6709 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_6755)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (= (select (select (store .cse0 .cse1 v_ArrVal_6709) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) .cse1)))) is different from false [2023-12-02 18:45:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681025958] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:45:49,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:45:49,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2023-12-02 18:45:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359698979] [2023-12-02 18:45:49,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:45:49,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 18:45:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:45:49,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 18:45:49,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=567, Unknown=26, NotChecked=330, Total=1056 [2023-12-02 18:45:49,744 INFO L87 Difference]: Start difference. First operand 3770 states and 5787 transitions. Second operand has 23 states, 19 states have (on average 7.473684210526316) internal successors, (142), 23 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:46:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:46:11,895 INFO L93 Difference]: Finished difference Result 7591 states and 11896 transitions. [2023-12-02 18:46:11,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:46:11,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 7.473684210526316) internal successors, (142), 23 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 112 [2023-12-02 18:46:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:46:11,907 INFO L225 Difference]: With dead ends: 7591 [2023-12-02 18:46:11,907 INFO L226 Difference]: Without dead ends: 7591 [2023-12-02 18:46:11,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 317 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=145, Invalid=609, Unknown=26, NotChecked=342, Total=1122 [2023-12-02 18:46:11,908 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 2458 mSDsluCounter, 8310 mSDsCounter, 0 mSdLazyCounter, 8961 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2481 SdHoareTripleChecker+Valid, 9099 SdHoareTripleChecker+Invalid, 8993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 8961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:46:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2481 Valid, 9099 Invalid, 8993 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 8961 Invalid, 0 Unknown, 0 Unchecked, 21.8s Time] [2023-12-02 18:46:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7591 states. [2023-12-02 18:46:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7591 to 3769. [2023-12-02 18:46:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3769 states, 3091 states have (on average 1.8450339695891298) internal successors, (5703), 3729 states have internal predecessors, (5703), 38 states have call successors, (38), 5 states have call predecessors, (38), 6 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:46:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3769 states to 3769 states and 5784 transitions. [2023-12-02 18:46:11,962 INFO L78 Accepts]: Start accepts. Automaton has 3769 states and 5784 transitions. Word has length 112 [2023-12-02 18:46:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:46:11,963 INFO L495 AbstractCegarLoop]: Abstraction has 3769 states and 5784 transitions. [2023-12-02 18:46:11,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 7.473684210526316) internal successors, (142), 23 states have internal predecessors, (142), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:46:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 3769 states and 5784 transitions. [2023-12-02 18:46:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-12-02 18:46:11,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:46:11,964 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:46:11,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-12-02 18:46:12,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 18:46:12,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2023-12-02 18:46:12,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:12,565 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr87REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:46:12,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:46:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 873525264, now seen corresponding path program 1 times [2023-12-02 18:46:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:46:12,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286846124] [2023-12-02 18:46:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:12,566 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 [2023-12-02 18:46:12,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:46:12,567 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:46:12,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 18:46:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:46:13,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-02 18:46:13,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:46:13,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:46:13,804 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:46:13,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:46:13,811 INFO L378 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 6 treesize of output 5 [2023-12-02 18:46:13,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:46:13,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:46:13,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-02 18:46:13,971 INFO L378 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 9 treesize of output 3 [2023-12-02 18:46:14,773 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:46:14,774 INFO L378 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 62 treesize of output 57 [2023-12-02 18:46:14,781 INFO L378 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 30 treesize of output 13 [2023-12-02 18:46:14,940 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:46:14,940 INFO L378 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 62 treesize of output 57 [2023-12-02 18:46:14,956 INFO L378 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 30 treesize of output 13 [2023-12-02 18:46:14,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 18:46:14,983 INFO L378 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 9 treesize of output 3 [2023-12-02 18:46:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:46:15,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:46:15,215 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_7225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7225) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (forall ((v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:46:15,258 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (and (forall ((v_ArrVal_7225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_7225) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (forall ((v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd .cse2 (_ bv4 32)) (bvadd .cse2 (_ bv8 32)))))))) is different from false [2023-12-02 18:46:16,854 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_7317 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7225 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7316 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7317))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7316) .cse0 v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv8 32)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_7225) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) (forall ((v_ArrVal_7317 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7316 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7224 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7316) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7317) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7224) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd .cse3 (_ bv4 32)) (bvadd .cse3 (_ bv8 32))))))) is different from false [2023-12-02 18:46:16,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:46:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286846124] [2023-12-02 18:46:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286846124] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:46:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254784787] [2023-12-02 18:46:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:46:16,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:46:16,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:46:16,872 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:46:16,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 18:48:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:34,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-02 18:48:34,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:48:34,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:48:34,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:48:34,665 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:48:34,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:48:34,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:48:34,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:48:34,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-12-02 18:48:34,919 INFO L378 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 [2023-12-02 18:48:35,680 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:48:35,681 INFO L378 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 [2023-12-02 18:48:35,687 INFO L378 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 [2023-12-02 18:48:35,902 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:48:35,902 INFO L378 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 [2023-12-02 18:48:35,908 INFO L378 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 [2023-12-02 18:48:35,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:48:35,934 INFO L378 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 [2023-12-02 18:48:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:48:35,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:48:36,009 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_7787 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7787) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (forall ((v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (bvule (bvadd (_ bv4 32) .cse1) (bvadd (_ bv8 32) .cse1)))))) is different from false [2023-12-02 18:48:36,053 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (and (forall ((v_ArrVal_7787 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_7787) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (forall ((v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse2) (bvadd (_ bv8 32) .cse2))))))) is different from false [2023-12-02 18:48:37,731 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_7879 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7878 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7879) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7878) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_7879 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7878 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7787 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_7786 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7878))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_7879) .cse2 v_ArrVal_7786) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) (select |c_#length| (select (select (store .cse3 .cse2 v_ArrVal_7787) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))) is different from false [2023-12-02 18:48:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254784787] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:48:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950883515] [2023-12-02 18:48:37,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:48:37,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:48:37,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:48:37,743 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:48:37,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 18:48:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:48:38,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 111 conjunts are in the unsatisfiable core [2023-12-02 18:48:38,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:48:38,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:48:38,748 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:48:38,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:48:38,755 INFO L378 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 6 treesize of output 5 [2023-12-02 18:48:38,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:48:38,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:48:38,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-02 18:48:38,867 INFO L378 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 9 treesize of output 3 [2023-12-02 18:48:39,653 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:48:39,653 INFO L378 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 62 treesize of output 57 [2023-12-02 18:48:39,669 INFO L378 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 30 treesize of output 13 [2023-12-02 18:48:39,760 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:48:39,761 INFO L378 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 62 treesize of output 57 [2023-12-02 18:48:39,768 INFO L378 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 30 treesize of output 13 [2023-12-02 18:48:39,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 18:48:39,803 INFO L378 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 9 treesize of output 3 [2023-12-02 18:48:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:48:39,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:48:39,881 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_8349 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_8349) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2023-12-02 18:48:39,923 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32))))) (forall ((v_ArrVal_8349 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv8 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_8349) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))))))) is different from false [2023-12-02 18:48:41,427 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_8441 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8440 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8349 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_8441))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_8440) .cse0 v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_8349) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) (forall ((v_ArrVal_8441 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8440 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8348 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_8440) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_8441) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8348) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv4 32) .cse3) (bvadd (_ bv8 32) .cse3)))))) is different from false [2023-12-02 18:48:41,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950883515] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:48:41,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:48:41,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-02 18:48:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562807376] [2023-12-02 18:48:41,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:48:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:48:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:48:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:48:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=231, Unknown=9, NotChecked=342, Total=650 [2023-12-02 18:48:41,443 INFO L87 Difference]: Start difference. First operand 3769 states and 5784 transitions. Second operand has 15 states, 12 states have (on average 10.666666666666666) internal successors, (128), 15 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:49:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:49:02,204 INFO L93 Difference]: Finished difference Result 7589 states and 11887 transitions. [2023-12-02 18:49:02,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:49:02,205 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 10.666666666666666) internal successors, (128), 15 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2023-12-02 18:49:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:49:02,218 INFO L225 Difference]: With dead ends: 7589 [2023-12-02 18:49:02,218 INFO L226 Difference]: Without dead ends: 7589 [2023-12-02 18:49:02,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 322 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=378, Unknown=9, NotChecked=432, Total=930 [2023-12-02 18:49:02,219 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 3779 mSDsluCounter, 3386 mSDsCounter, 0 mSdLazyCounter, 7150 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3795 SdHoareTripleChecker+Valid, 4200 SdHoareTripleChecker+Invalid, 7187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 7150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:49:02,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3795 Valid, 4200 Invalid, 7187 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 7150 Invalid, 0 Unknown, 0 Unchecked, 20.3s Time] [2023-12-02 18:49:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2023-12-02 18:49:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 3768. [2023-12-02 18:49:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 3091 states have (on average 1.8440634098997088) internal successors, (5700), 3728 states have internal predecessors, (5700), 38 states have call successors, (38), 5 states have call predecessors, (38), 6 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:49:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 5781 transitions. [2023-12-02 18:49:02,315 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 5781 transitions. Word has length 112 [2023-12-02 18:49:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:49:02,316 INFO L495 AbstractCegarLoop]: Abstraction has 3768 states and 5781 transitions. [2023-12-02 18:49:02,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 10.666666666666666) internal successors, (128), 15 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:49:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 5781 transitions. [2023-12-02 18:49:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 18:49:02,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:49:02,318 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:49:02,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-12-02 18:49:02,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2023-12-02 18:49:02,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2023-12-02 18:49:02,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:49:02,919 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:49:02,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:49:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1942219804, now seen corresponding path program 1 times [2023-12-02 18:49:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:49:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264640168] [2023-12-02 18:49:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:49:02,921 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 [2023-12-02 18:49:02,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:49:02,922 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:49:02,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 18:49:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:49:04,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 18:49:04,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:49:04,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:49:04,359 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:49:04,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:49:04,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:49:04,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:49:05,407 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:49:05,407 INFO L378 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 44 treesize of output 43 [2023-12-02 18:49:05,569 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:49:05,569 INFO L378 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 44 treesize of output 43 [2023-12-02 18:49:05,681 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:49:05,682 INFO L378 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 44 treesize of output 43 [2023-12-02 18:49:05,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:49:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:49:05,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:49:05,830 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8881 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_8881) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1)))) is different from false [2023-12-02 18:49:05,844 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8881 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_8881) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))))) is different from false [2023-12-02 18:49:05,861 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8881 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8880 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_8880))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8881)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:49:05,877 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8881 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8880 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8880))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8881)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:49:06,401 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_8881 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8880 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_8927 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_8927))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8880)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_8881)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (_ bv0 1))) is different from false [2023-12-02 18:49:06,405 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:49:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264640168] [2023-12-02 18:49:06,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264640168] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:49:06,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1414967534] [2023-12-02 18:49:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:49:06,406 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:49:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:49:06,407 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:49:06,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2023-12-02 18:50:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:50:03,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-02 18:50:03,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:50:03,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:50:03,736 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:50:03,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:50:03,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:50:03,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:50:04,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 18:50:04,067 INFO L378 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 [2023-12-02 18:50:05,239 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:50:05,240 INFO L378 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 47 [2023-12-02 18:50:05,245 INFO L378 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 [2023-12-02 18:50:05,448 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:50:05,448 INFO L378 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 47 [2023-12-02 18:50:05,457 INFO L378 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 [2023-12-02 18:50:05,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:50:05,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 66 [2023-12-02 18:50:05,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 18:50:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:50:05,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:50:05,687 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9415 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_9415) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1)) (_ bv0 1)) (not (= (let ((.cse3 (bvadd |c_ULTIMATE.start_main_#t~mem42#1.offset| (_ bv7 32)))) (store (let ((.cse2 (bvadd (_ bv6 32) |c_ULTIMATE.start_main_#t~mem42#1.offset|))) (store (let ((.cse1 (bvadd |c_ULTIMATE.start_main_#t~mem42#1.offset| (_ bv5 32)))) (store (let ((.cse0 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_#t~mem42#1.offset|))) (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base|) .cse0 (select v_ArrVal_9415 .cse0))) .cse1 (select v_ArrVal_9415 .cse1))) .cse2 (select v_ArrVal_9415 .cse2))) .cse3 (select v_ArrVal_9415 .cse3))) v_ArrVal_9415)))) is different from false [2023-12-02 18:50:05,757 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9415 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (or (not (= (let ((.cse2 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~user~0#1.base|) .cse6))) (let ((.cse5 (bvadd .cse2 (_ bv7 32)))) (store (let ((.cse4 (bvadd .cse2 (_ bv6 32)))) (store (let ((.cse3 (bvadd .cse2 (_ bv5 32)))) (store (let ((.cse1 (bvadd (_ bv4 32) .cse2))) (store (select |c_#memory_$Pointer$.base| .cse0) .cse1 (select v_ArrVal_9415 .cse1))) .cse3 (select v_ArrVal_9415 .cse3))) .cse4 (select v_ArrVal_9415 .cse4))) .cse5 (select v_ArrVal_9415 .cse5)))) v_ArrVal_9415)) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_9415) |c_ULTIMATE.start_main_~user~0#1.base|) .cse6)) (_ bv1 1))))))) is different from false [2023-12-02 18:50:05,913 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9415 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9412 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_9412)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (or (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store .cse0 .cse1 v_ArrVal_9415) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)) (_ bv1 1))) (not (= (let ((.cse4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_9413) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse7 (bvadd .cse4 (_ bv7 32)))) (store (let ((.cse6 (bvadd (_ bv6 32) .cse4))) (store (let ((.cse5 (bvadd .cse4 (_ bv5 32)))) (store (let ((.cse3 (bvadd (_ bv4 32) .cse4))) (store (select .cse0 .cse1) .cse3 (select v_ArrVal_9415 .cse3))) .cse5 (select v_ArrVal_9415 .cse5))) .cse6 (select v_ArrVal_9415 .cse6))) .cse7 (select v_ArrVal_9415 .cse7)))) v_ArrVal_9415)))))) is different from false [2023-12-02 18:50:06,112 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9415 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9412 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse7 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse8))) (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse7 v_ArrVal_9412))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse8))) (or (not (= (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| .cse7 v_ArrVal_9413) |c_ULTIMATE.start_main_~user~0#1.base|) .cse8))) (let ((.cse6 (bvadd .cse3 (_ bv7 32)))) (store (let ((.cse5 (bvadd (_ bv6 32) .cse3))) (store (let ((.cse4 (bvadd .cse3 (_ bv5 32)))) (store (let ((.cse2 (bvadd (_ bv4 32) .cse3))) (store (select .cse0 .cse1) .cse2 (select v_ArrVal_9415 .cse2))) .cse4 (select v_ArrVal_9415 .cse4))) .cse5 (select v_ArrVal_9415 .cse5))) .cse6 (select v_ArrVal_9415 .cse6)))) v_ArrVal_9415)) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store .cse0 .cse1 v_ArrVal_9415) |c_ULTIMATE.start_main_~user~0#1.base|) .cse8)) (_ bv1 1))))))))) is different from false [2023-12-02 18:50:07,591 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9507 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9506 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9415 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9413 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9412 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_9507)) (.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse8 (select (select .cse9 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse0 (store .cse9 .cse8 v_ArrVal_9412))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (or (= (bvadd (select |c_#valid| (select (select (store .cse0 .cse1 v_ArrVal_9415) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)) (_ bv1 1)) (_ bv0 1)) (not (= (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_9506) .cse8 v_ArrVal_9413) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse7 (bvadd .cse4 (_ bv7 32)))) (store (let ((.cse6 (bvadd (_ bv6 32) .cse4))) (store (let ((.cse5 (bvadd .cse4 (_ bv5 32)))) (store (let ((.cse3 (bvadd (_ bv4 32) .cse4))) (store (select .cse0 .cse1) .cse3 (select v_ArrVal_9415 .cse3))) .cse5 (select v_ArrVal_9415 .cse5))) .cse6 (select v_ArrVal_9415 .cse6))) .cse7 (select v_ArrVal_9415 .cse7)))) v_ArrVal_9415)))))))) is different from false [2023-12-02 18:50:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1414967534] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:50:07,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318945318] [2023-12-02 18:50:07,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:50:07,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:50:07,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:50:07,609 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:50:07,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 18:50:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:50:08,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 18:50:08,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:50:08,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:50:08,512 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:50:08,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:50:08,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:50:09,182 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:09,182 INFO L378 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 44 treesize of output 43 [2023-12-02 18:50:09,317 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:09,318 INFO L378 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 44 treesize of output 43 [2023-12-02 18:50:09,406 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:09,407 INFO L378 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 44 treesize of output 43 [2023-12-02 18:50:09,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:50:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:50:09,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:50:09,437 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9946 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_9946) |c_ULTIMATE.start_main_~user~0#1.base|) (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:50:09,448 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9946 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_9946) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (_ bv0 1))) is different from false [2023-12-02 18:50:09,460 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9946 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9945 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_9945))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9946)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:50:09,472 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9946 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9945 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9945))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9946)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (_ bv0 1))) is different from false [2023-12-02 18:50:09,873 INFO L349 Elim1Store]: treesize reduction 7, result has 87.3 percent of original size [2023-12-02 18:50:09,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2023-12-02 18:50:09,885 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_9992 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9946 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_9945 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_9992))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9945)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_9946)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)) |c_ULTIMATE.start_main_#t~mem39#1.base|)) is different from false [2023-12-02 18:50:09,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318945318] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:50:09,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:50:09,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 29 [2023-12-02 18:50:09,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866292206] [2023-12-02 18:50:09,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:50:09,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 18:50:09,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:50:09,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 18:50:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=796, Unknown=15, NotChecked=1080, Total=2070 [2023-12-02 18:50:09,889 INFO L87 Difference]: Start difference. First operand 3768 states and 5781 transitions. Second operand has 30 states, 26 states have (on average 5.846153846153846) internal successors, (152), 29 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:50:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:50:29,902 INFO L93 Difference]: Finished difference Result 7589 states and 11890 transitions. [2023-12-02 18:50:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 18:50:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 5.846153846153846) internal successors, (152), 29 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 114 [2023-12-02 18:50:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:50:29,909 INFO L225 Difference]: With dead ends: 7589 [2023-12-02 18:50:29,909 INFO L226 Difference]: Without dead ends: 7589 [2023-12-02 18:50:29,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=219, Invalid=1016, Unknown=15, NotChecked=1200, Total=2450 [2023-12-02 18:50:29,910 INFO L413 NwaCegarLoop]: 787 mSDtfsCounter, 2451 mSDsluCounter, 8961 mSDsCounter, 0 mSdLazyCounter, 9818 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2474 SdHoareTripleChecker+Valid, 9748 SdHoareTripleChecker+Invalid, 9855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 9818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:50:29,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2474 Valid, 9748 Invalid, 9855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 9818 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2023-12-02 18:50:29,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7589 states. [2023-12-02 18:50:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7589 to 3767. [2023-12-02 18:50:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3091 states have (on average 1.843092850210288) internal successors, (5697), 3727 states have internal predecessors, (5697), 38 states have call successors, (38), 5 states have call predecessors, (38), 6 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:50:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 5778 transitions. [2023-12-02 18:50:29,952 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 5778 transitions. Word has length 114 [2023-12-02 18:50:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:50:29,952 INFO L495 AbstractCegarLoop]: Abstraction has 3767 states and 5778 transitions. [2023-12-02 18:50:29,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 5.846153846153846) internal successors, (152), 29 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 18:50:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 5778 transitions. [2023-12-02 18:50:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 18:50:29,953 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:50:29,953 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:50:29,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2023-12-02 18:50:30,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2023-12-02 18:50:30,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 18:50:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:50:30,554 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:50:30,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:50:30,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1942219805, now seen corresponding path program 1 times [2023-12-02 18:50:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:50:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623452860] [2023-12-02 18:50:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:50:30,555 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 [2023-12-02 18:50:30,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:50:30,556 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:50:30,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-12-02 18:50:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:50:31,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 114 conjunts are in the unsatisfiable core [2023-12-02 18:50:31,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:50:31,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:50:31,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:50:31,782 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:50:31,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:50:31,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:50:31,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:50:31,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-02 18:50:31,913 INFO L378 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 9 treesize of output 3 [2023-12-02 18:50:32,494 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:32,494 INFO L378 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 62 treesize of output 57 [2023-12-02 18:50:32,503 INFO L378 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 30 treesize of output 13 [2023-12-02 18:50:32,592 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:32,592 INFO L378 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 62 treesize of output 57 [2023-12-02 18:50:32,598 INFO L378 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 30 treesize of output 13 [2023-12-02 18:50:32,690 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:50:32,690 INFO L378 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 62 treesize of output 57 [2023-12-02 18:50:32,702 INFO L378 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 30 treesize of output 13 [2023-12-02 18:50:32,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 18:50:32,721 INFO L378 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 9 treesize of output 3 [2023-12-02 18:50:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:50:32,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:50:32,908 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_10478) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2023-12-02 18:50:32,941 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (and (forall ((v_ArrVal_10478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_10478) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (forall ((v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32)))))))) is different from false [2023-12-02 18:50:33,035 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_10476))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_10477) .cse0 v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_10478) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) (forall ((v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_10477) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_10476) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse3) (bvadd .cse3 (_ bv12 32))))))) is different from false [2023-12-02 18:50:33,210 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_10476))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_10477) .cse1 v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_10478) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))))) (forall ((v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_10477) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_10476) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse4 (_ bv8 32)) (bvadd .cse4 (_ bv12 32)))))))) is different from false [2023-12-02 18:50:35,262 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_10571 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10570 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_10571))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_10570) .cse1 v_ArrVal_10477) (select (select (store .cse2 .cse1 v_ArrVal_10476) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) v_ArrVal_10479))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_10571 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10570 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10476 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10477 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10478 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_10479 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_10571))) (let ((.cse4 (select (select .cse7 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (let ((.cse6 (store .cse7 .cse4 v_ArrVal_10476))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~user~0#1.base|) .cse3))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_10570) .cse4 v_ArrVal_10477) .cse5 v_ArrVal_10479) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3) (_ bv12 32)) (select |c_#length| (select (select (store .cse6 .cse5 v_ArrVal_10478) |c_ULTIMATE.start_main_~user~0#1.base|) .cse3)))))))))) is different from false [2023-12-02 18:50:35,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:50:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623452860] [2023-12-02 18:50:35,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623452860] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:50:35,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [615455328] [2023-12-02 18:50:35,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:50:35,280 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:50:35,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:50:35,281 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:50:35,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2023-12-02 18:51:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:42,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 117 conjunts are in the unsatisfiable core [2023-12-02 18:51:42,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:42,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:51:42,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:51:42,983 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:51:42,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:51:43,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 18:51:43,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:51:43,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-12-02 18:51:43,357 INFO L378 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 [2023-12-02 18:51:44,291 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:51:44,291 INFO L378 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 [2023-12-02 18:51:44,298 INFO L378 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 [2023-12-02 18:51:44,552 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:51:44,552 INFO L378 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 [2023-12-02 18:51:44,559 INFO L378 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 [2023-12-02 18:51:44,711 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:51:44,711 INFO L378 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 [2023-12-02 18:51:44,726 INFO L378 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 [2023-12-02 18:51:44,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 18:51:44,761 INFO L378 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 [2023-12-02 18:51:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:51:44,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:51:44,828 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_11057 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11057) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0)))) (forall ((v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (bvule (bvadd (_ bv8 32) .cse1) (bvadd .cse1 (_ bv12 32))))))) is different from false [2023-12-02 18:51:44,867 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse0 (_ bv8 32)) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_11057 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_11057) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))))))) is different from false [2023-12-02 18:51:44,990 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_11055 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11056 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11056) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11055) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_11055 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11056 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11057 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11055))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11056) .cse2 v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse2 v_ArrVal_11057) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))) is different from false [2023-12-02 18:51:45,123 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_11055 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11056 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11057 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_11055))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_11056) .cse1 v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_11057) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))))) (forall ((v_ArrVal_11055 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11056 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11058 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_11056) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_11055) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_11058) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse4 (_ bv8 32)) (bvadd .cse4 (_ bv12 32)))))))) is different from false [2023-12-02 18:51:48,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [615455328] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:48,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784111590] [2023-12-02 18:51:48,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:51:48,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:51:48,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:51:48,458 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:51:48,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-12-02 18:51:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:51:49,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 114 conjunts are in the unsatisfiable core [2023-12-02 18:51:49,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:51:49,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:51:49,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:51:49,592 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:51:49,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:51:49,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 18:51:49,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:51:49,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-12-02 18:51:49,733 INFO L378 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 9 treesize of output 3 [2023-12-02 18:51:50,888 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:51:50,888 INFO L378 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 62 treesize of output 57 [2023-12-02 18:51:50,897 INFO L378 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 30 treesize of output 13 [2023-12-02 18:51:51,028 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:51:51,028 INFO L378 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 62 treesize of output 57 [2023-12-02 18:51:51,037 INFO L378 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 30 treesize of output 13 [2023-12-02 18:51:51,128 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:51:51,128 INFO L378 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 62 treesize of output 57 [2023-12-02 18:51:51,149 INFO L378 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 30 treesize of output 13 [2023-12-02 18:51:51,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 18:51:51,179 INFO L378 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 9 treesize of output 3 [2023-12-02 18:51:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:51:51,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:51:51,260 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11637 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_11637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))) is different from false [2023-12-02 18:51:51,307 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11637 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_11637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))))))) is different from false [2023-12-02 18:51:51,451 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11635) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11634) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11637 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11634))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_11635) .cse2 v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse2 v_ArrVal_11637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))))))) is different from false [2023-12-02 18:51:51,553 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (and (forall ((v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11637 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_11634))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_11635) .cse1 v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_11637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))))) (forall ((v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_11635) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_11634) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse4 (_ bv8 32)) (bvadd .cse4 (_ bv12 32)))))))) is different from false [2023-12-02 18:51:54,251 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (and (forall ((v_ArrVal_11729 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11728 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11637 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_11729))) (let ((.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (let ((.cse3 (store .cse4 .cse0 v_ArrVal_11634))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_11728) .cse0 v_ArrVal_11635) .cse1 v_ArrVal_11636) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) (_ bv12 32)) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_11637) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2)))))))) (forall ((v_ArrVal_11729 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11635 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11636 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11634 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_11728 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_11729))) (let ((.cse6 (select (select .cse7 |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_11728) .cse6 v_ArrVal_11635) (select (select (store .cse7 .cse6 v_ArrVal_11634) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2) v_ArrVal_11636))) |c_ULTIMATE.start_main_~user~0#1.base|) .cse2))) (bvule (bvadd .cse5 (_ bv8 32)) (bvadd .cse5 (_ bv12 32))))))) is different from false [2023-12-02 18:51:54,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784111590] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:51:54,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:51:54,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2023-12-02 18:51:54,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430439201] [2023-12-02 18:51:54,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:51:54,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:51:54,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:51:54,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:51:54,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=321, Unknown=23, NotChecked=686, Total=1122 [2023-12-02 18:51:54,275 INFO L87 Difference]: Start difference. First operand 3767 states and 5778 transitions. Second operand has 17 states, 14 states have (on average 9.428571428571429) internal successors, (132), 17 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:52:38,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:52:38,500 INFO L93 Difference]: Finished difference Result 7587 states and 11881 transitions. [2023-12-02 18:52:38,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:52:38,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.428571428571429) internal successors, (132), 17 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2023-12-02 18:52:38,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:52:38,508 INFO L225 Difference]: With dead ends: 7587 [2023-12-02 18:52:38,508 INFO L226 Difference]: Without dead ends: 7587 [2023-12-02 18:52:38,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 326 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 14 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=146, Invalid=537, Unknown=23, NotChecked=854, Total=1560 [2023-12-02 18:52:38,509 INFO L413 NwaCegarLoop]: 812 mSDtfsCounter, 3769 mSDsluCounter, 5235 mSDsCounter, 0 mSdLazyCounter, 11470 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3785 SdHoareTripleChecker+Valid, 6047 SdHoareTripleChecker+Invalid, 11506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 11470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:52:38,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3785 Valid, 6047 Invalid, 11506 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 11470 Invalid, 0 Unknown, 0 Unchecked, 43.3s Time] [2023-12-02 18:52:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2023-12-02 18:52:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 3766. [2023-12-02 18:52:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3766 states, 3091 states have (on average 1.842122290520867) internal successors, (5694), 3726 states have internal predecessors, (5694), 38 states have call successors, (38), 5 states have call predecessors, (38), 6 states have return successors, (43), 35 states have call predecessors, (43), 38 states have call successors, (43) [2023-12-02 18:52:38,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3766 states to 3766 states and 5775 transitions. [2023-12-02 18:52:38,561 INFO L78 Accepts]: Start accepts. Automaton has 3766 states and 5775 transitions. Word has length 114 [2023-12-02 18:52:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:52:38,561 INFO L495 AbstractCegarLoop]: Abstraction has 3766 states and 5775 transitions. [2023-12-02 18:52:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.428571428571429) internal successors, (132), 17 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:52:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3766 states and 5775 transitions. [2023-12-02 18:52:38,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 18:52:38,562 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:52:38,562 INFO L195 NwaCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:52:38,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2023-12-02 18:52:38,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-12-02 18:52:38,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2023-12-02 18:52:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:52:39,163 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 987 more)] === [2023-12-02 18:52:39,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:52:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1834481916, now seen corresponding path program 1 times [2023-12-02 18:52:39,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:52:39,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832148323] [2023-12-02 18:52:39,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:52:39,164 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 [2023-12-02 18:52:39,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:52:39,165 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 18:52:39,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2023-12-02 18:52:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:52:40,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 18:52:40,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:52:40,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-12-02 18:52:40,651 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:52:40,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:52:40,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 18:52:40,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 18:52:42,279 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:52:42,280 INFO L378 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 44 treesize of output 43 [2023-12-02 18:52:42,485 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:52:42,485 INFO L378 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 44 treesize of output 43 [2023-12-02 18:52:42,644 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:52:42,644 INFO L378 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 44 treesize of output 43 [2023-12-02 18:52:42,806 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:52:42,806 INFO L378 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 44 treesize of output 43 [2023-12-02 18:52:42,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-12-02 18:52:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2023-12-02 18:52:42,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:52:45,125 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select |c_#valid| (let ((.cse0 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse0) v_ArrVal_12185) |c_ULTIMATE.start_main_~user~0#1.base|) .cse0))) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:52:45,148 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12184 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem42#1.base| v_ArrVal_12184))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12185)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:52:45,171 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12184 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12184))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12185)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:52:45,195 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12184 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12183 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem41#1.base| v_ArrVal_12183))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12184)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12185)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:52:45,224 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12184 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12183 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12183))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12184)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12185)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1))) (_ bv1 1)))) is different from false [2023-12-02 18:52:45,788 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_12231 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12184 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12185 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_12183 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select |c_#valid| (let ((.cse1 (bvadd (_ bv8 32) |c_ULTIMATE.start_main_~user~0#1.offset|))) (select (select (let ((.cse0 (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem39#1.base| v_ArrVal_12231))) (store .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12183)))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12184)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~user~0#1.base|) .cse1) v_ArrVal_12185)) |c_ULTIMATE.start_main_~user~0#1.base|) .cse1)))) (_ bv0 1))) is different from false [2023-12-02 18:52:45,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:52:45,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832148323] [2023-12-02 18:52:45,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832148323] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:52:45,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [448460424] [2023-12-02 18:52:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:52:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:52:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:52:45,796 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:52:45,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00a5964b-0302-4c91-a02d-9256bd508635/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process